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-   -   VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products (http://www.chiefdelphi.com/forums/showthread.php?t=109868)

Bob Steele 06-12-2012 16:50

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Ricky Q. (Post 1199271)
Bob,

I sent you a PM. My inkling is that your Country Selector at the top right of the site is not on the US.

Ricky

Got your PM... It must have been a different issue than the Country selector..or the Cache
It only messed with me when I was logged in to my VEX account. When I logged off it worked fine.

Now all is right...even when logged in... after the fix you applied...
thanks for helping..

R

Jared Russell 06-12-2012 16:59

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
How are wedgetop and roughtop designed to be attached to the traction wheels? Drill some through holes and use rivets?

EDIT: BTW, I noticed that product 217-2712 was not listed in the "Specifications" section of this page: http://www.vexrobotics.com/vexpro/ge...pro-gears.html

skimoose 06-12-2012 17:26

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Allison (Post 1199268)
I am interested in the weight of the Ball shifter in it's different configurations. The website listed the weight at 2.5 lbs. Is that the 2 stage version with the mounting bracket? How much does it weigh when you add the third stage?

Thanks

Allison

If you check the bottom of the page below the CAD files you can note that the two stage package is 2.50 lbs., and the three stage gearbox is 3.05 lbs.

JVN can clarify, but I would assume those weights are fully dressed with the mounting bracket and the pneumatic cylinder.

Congratulations to everyone at IFI, the entire product line is simply amazing, I already have a long shopping list. Christmas came early this year!

The VEXpro line may just cause more traffic here on CD, than a 2013 FRC game hint! :yikes:

JVN 06-12-2012 18:05

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Interesting phenomenon we're seeing...
We've had a few VEXpro Ball Shifter sales, and most of these orders include a pneumatic pancake cylinder, and encoder mounts.

These are included.
Every ball shifter includes the pneumatic cylinder, all the hardware to mount it, and all the hardware for encoder mounting.

I've asked out web-team to try to be more clear on the product page.

-John

AdamHeard 06-12-2012 18:09

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1199301)
Interesting phenomenon we're seeing...
We've had a few VEXpro Ball Shifter sales, and most of these orders include a pneumatic pancake cylinder, and encoder mounts.

These are included.
Every ball shifter includes the pneumatic cylinder, all the hardware to mount it, and all the hardware for encoder mounting.

I've asked out web-team to try to be more clear on the product page.

-John

I've thoroughly read all the product pages along with a few other team members, and for the items like the ballshifters, it is a bit confusing during the first read. A lot of the items could be a bit more clearly displayed probably. If myself and other experienced members need a double take to figure out what's going on, I'm sure the casual team will be confused by the pages.

Andrew Lawrence 06-12-2012 19:20

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Can you post the dimensions of the VersaHub? Definitely looks like something we'll be using in the near future.

David Doerr 06-12-2012 19:23

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by AdamHeard (Post 1199302)
I've thoroughly read all the product pages along with a few other team members, and for the items like the ballshifters, it is a bit confusing during the first read...

I agree. A close read reveals that the pneumatic and encoder hardware kits are included with the shifter. Those items should probably have "(included with the base kit)" or something similar added to the description.

I hope if you order the optional gear kit along with the 3-stage shifter you get both the 60:24 and 64:20 gear sets - because that's what I did and that's what I wanted...

DampRobot 06-12-2012 19:40

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
JVN, can you comment on the material of the Ball Shifter casing? I assume it is some sort of plastic. I've had a lot of trouble with polycarb sideplates making motors overheat in drive gearboxes in the past. Have you tested for this? Also, any plan to sell aluminium versions of the casing (as side plates with spacers)?

JVN 06-12-2012 19:48

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by DampRobot (Post 1199339)
JVN, can you comment on the material of the Ball Shifter casing? I assume it is some sort of plastic. I've had a lot of trouble with polycarb sideplates making motors overheat in drive gearboxes in the past. Have you tested for this? Also, any plan to sell aluminium versions of the casing (as side plates with spacers)?

The Ball Shifter casing is Glass-Filled Nylon. I've never heard of motors overheating as you've described. We are not planning to sell an aluminum version, or a side-plate + spacer version -- though the design does lend itself to teams being able to make their own.

-John

DampRobot 06-12-2012 19:54

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1199346)
The Ball Shifter casing is Glass-Filled Nylon. I've never heard of motors overheating as you've described. We are not planning to sell an aluminum version, or a side-plate + spacer version -- though the design does lend itself to teams being able to make their own.

-John

Funny, we've often had problems with Fischer Prices overheating in the drive, and many teams use fans on their practice robots to keep their CIMs from overheating (even with aluminium side plates). A little surprising, but interesting nonetheless.

scottandme 06-12-2012 20:16

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Are the parts lists for the 2 and 3 stage ball shifters mixed up?

The 2 stage lists "Ball Shifter Long Output Shaft Assembly with 60t and 44t Ball Shifter Gears"

The 3 stage lists "Ball Shifter Short Output Shaft Assembly with 60t and 44t Ball Shifter Gears"

The images (and CAD) show the 2 stage with a shorter output shaft than the 3 stage, which I assume is correct.

Any ideas for using the 3-stage shifter for a WCD/direct driven center wheel? The lower housing hex standoffs look like they will interfere with putting a 16T #25 sprocket on the drive axle to power the front/rear wheels. Turning the gearbox sideways would work, but that eats up >2" of ground clearance, meaning at least 6" wheels would be required.

MichaelBick 06-12-2012 20:52

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by scottandme (Post 1199384)
Are the parts lists for the 2 and 3 stage ball shifters mixed up?

The 2 stage lists "Ball Shifter Long Output Shaft Assembly with 60t and 44t Ball Shifter Gears"

The 3 stage lists "Ball Shifter Short Output Shaft Assembly with 60t and 44t Ball Shifter Gears"

The images (and CAD) show the 2 stage with a shorter output shaft than the 3 stage, which I assume is correct.

Any ideas for using the 3-stage shifter for a WCD/direct driven center wheel? The lower housing hex standoffs look like they will interfere with putting a 16T #25 sprocket on the drive axle to power the front/rear wheels. Turning the gearbox sideways would work, but that eats up >2" of ground clearance, meaning at least 6" wheels would be required.

As far as I've seen, to get a reasonably speedy robot, you need to use 6" wheels anyways. The ball shifter ratios really aren't built for direct driving 4" wheels. That said, the 3rd stage is really versatile. There are a a lot more options that you can get by switching out the 2 default 3rd stage gears ratios for different gears.

David Doerr 06-12-2012 21:04

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by scottandme (Post 1199384)
Any ideas for using the 3-stage shifter for a WCD/direct driven center wheel? The lower housing hex standoffs look like they will interfere with putting a 16T #25 sprocket on the drive axle to power the front/rear wheels. Turning the gearbox sideways would work, but that eats up >2" of ground clearance, meaning at least 6" wheels would be required.

How about turning the gearbox upside-down so the CIMs are on the bottom?

David Doerr 06-12-2012 21:05

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by MICHAELABICK (Post 1199414)
As far as I've seen, to get a reasonably speedy robot, you need to use 6" wheels anyways. The ball shifter ratios really aren't built for direct driving 4" wheels.

What ratio would you want to have in order to drive 4" wheels?

MichaelBick 06-12-2012 21:08

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by David Doerr (Post 1199423)
What ratio would you want to have in order to drive 4" wheels?

IIRC a 30T vex gear and a custom 54T gear make a nice 15-16 FPS(assuming no friction).

AlecMataloni 06-12-2012 21:19

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
For anyone interested, a friend of mine made a consolidated zip folder with STEP files for every available vexpro product that was just released.

He's hosting it on his google drive: https://docs.google.com/file/d/0Bx6d...FyZTdQSlE/edit

Beware: Google Drive has a download cap, so if someone were to mirror this, that would be appreciated.

Joe G. 06-12-2012 21:25

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by David Doerr (Post 1199423)
What ratio would you want to have in order to drive 4" wheels?

Or, the new VEXpro 34t and 50t will cover the right C-C distance, and provide a theoretical 16.17 fps in high gear.

scottandme 06-12-2012 21:27

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by David Doerr (Post 1199422)
How about turning the gearbox upside-down so the CIMs are on the bottom?

That's the orientation I was looking at.

With 5" wheels, the 60:24 3rd stage would give you speeds of 5.5 ft/s and 12.6 ft/s (probably ~4.5 and ~10.2 after accounting for 80% of theoretical). Current draw would be right under 40A at stall in low gear, which is ideal. Would have been near perfect for the 2012 game.

Playing with making aluminum plates to replace the housing, will be heavier but at least mounting will be easier.

David Doerr 06-12-2012 21:40

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by scottandme (Post 1199434)
That's the orientation I was looking at.

Now I see what you mean. None of the hex standoffs seem positioned optimally for driving the front/rear wheels on a WCD.

dcarr 06-12-2012 21:51

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by AlecMataloni (Post 1199429)
Beware: Google Drive has a download cap, so if someone were to mirror this, that would be appreciated.

http://www.team3309.org/VexPRO_CAD.zip

AlecMataloni 06-12-2012 22:03

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by dcarr (Post 1199448)

Thank you!

Walter Deitzler 06-12-2012 23:07

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Are going to be any assembly instruction videos (attaching the wheel to the hub, hub to sprocket) going up by any chance? I feel like it might be helpful to some teams decided whether or not to go with these or not, knowing how to put them together is great.

Overall, this is a GREAT thing, and I would like to thank IFI for it.

(I am almost happy that all of my CAD on the school computers went down, now I can redesign everything using these over winter break)

ParkerF 06-12-2012 23:45

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by LedLover96 (Post 1199472)
Are going to be any assembly instruction videos (attaching the wheel to the hub, hub to sprocket) going up by any chance? I feel like it might be helpful to some teams decided whether or not to go with these or not, knowing how to put them together is great.

Overall, this is a GREAT thing, and I would like to thank IFI for it.

(I am almost happy that all of my CAD on the school computers went down, now I can redesign everything using these over winter break)

The VersaHub page has really good views of how everything works. The hub protrusions literally just fall into the matching recesses and you slap some bolts into it. It really is that easy.

timytamy 07-12-2012 06:13

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Curious about what kind of lead time/cut off you will have for international orders. Will you be able to ship to Aus before kickoff? If so when is the cut off date.

Ricky Q. 07-12-2012 07:43

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Allison (Post 1199268)
I am interested in the weight of the Ball shifter in it's different configurations. The website listed the weight at 2.5 lbs. Is that the 2 stage version with the mounting bracket? How much does it weigh when you add the third stage?

Thanks

Allison

The 2-Stage and 3-Stage weights listed on the product page are with everything but motors, including the pneumatic cylinder.

Ricky Q. 07-12-2012 07:46

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by David Doerr (Post 1199325)
I hope if you order the optional gear kit along with the 3-stage shifter you get both the 60:24 and 64:20 gear sets - because that's what I did and that's what I wanted...

Yes, you will be getting both gear sets.

Brandon Holley 07-12-2012 07:50

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Can one of you comment on how much assembly is required for the ball shifter upon receipt of it?

-Brando

ttldomination 07-12-2012 10:07

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Jared341 (Post 1199285)
How are wedgetop and roughtop designed to be attached to the traction wheels? Drill some through holes and use rivets?

EDIT: BTW, I noticed that product 217-2712 was not listed in the "Specifications" section of this page: http://www.vexrobotics.com/vexpro/ge...pro-gears.html

Bumping this question. I know many teams opt to use their own nitrile tread, whether its for functionality or aesthetics.

- Sunny G.

Dave Campbell 07-12-2012 10:10

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
THANKS for this awesome resource! I have tears of joy in my eyes....
Students - let this be a lesson in business applications of engineering - Both VEX (IFI) and AndyMark are fantastic companies serving an exploding market. Your challenge is to figure out what is next and build your own excellent company.

Paul Copioli 07-12-2012 10:28

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Brandon Holley (Post 1199510)
Can one of you comment on how much assembly is required for the ball shifter upon receipt of it?

Brandon,

The main ball shift shaft, which contains the two ball shift gears, shift engagement balls, retaining ring, and shifting axle is all preassembled. The customer has to assemble the cluster shaft and two gears on the cluster shaft, insert the ball shift shaft with 2 bearings, and assemble the housings and motors. Additionally, the user has to assemble the 2 standoffs for the shifer and the pneumatic cylinder. If the user wants to use encoders, then that hardware must be assembled too.

The user does not have to deal with the ball shift mechanism as that will be pre-assembled.

Paul

sdcantrell56 07-12-2012 10:44

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Paul,

Would it be possible to buy just the shifter shaft and all the associated hardware without the two gears? We would love to do the ball shifting but would prefer different gear ratios and would just machine our own gears most likely from your other gear options.

pfreivald 07-12-2012 10:59

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
I have a simple question, only necessary because our computer lab is closed and I don't have any CAD software on my classroom PC... (Not for lack of trying, mind...):

How wide are the mecanum wheels with/without hubs on them? We're in the process of upgrading our octocanum drive platform and are wondering how much redesign would be necessary for these wheels/hubs.

Thanks!

Patrick

JVN 07-12-2012 11:20

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by pfreivald (Post 1199538)
I have a simple question, only necessary because our computer lab is closed and I don't have any CAD software on my classroom PC... (Not for lack of trying, mind...):

How wide are the mecanum wheels with/without hubs on them? We're in the process of upgrading our octocanum drive platform and are wondering how much redesign would be necessary for these wheels/hubs.

Thanks!

Patrick

Hi Patrick,
We're going to be posting individual part drawings with key dimensions in the coming weeks (we posted the STEP files to help people get started).

The Mecanum wheels are both about 2.3" wide. The widest point is roller-roller.

-John

Walter Deitzler 07-12-2012 11:27

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Are the screws for the VersaHubs included the the purchase? Or do we have to buy those separately?

pfreivald 07-12-2012 11:28

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1199539)
Hi Patrick,
We're going to be posting individual part drawings with key dimensions in the coming weeks (we posted the STEP files to help people get started).

The Mecanum wheels are both about 2.3" wide. The widest point is roller-roller.

-John

Excellent, thank you.

JVN 07-12-2012 11:37

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by LedLover96 (Post 1199540)
Are the screws for the VersaHubs included the the purchase? Or do we have to buy those separately?

The mounting hardware is not included with the hub.

JB 07-12-2012 12:17

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Nuttyman54 (Post 1199255)
John, are there any plans to provide an adapter for gates belt pulleys to the versahub system? I could see that being a very popular addition.

I am also very curious about this, I think a lot of teams are going to start using belts in the future and was wondering if there were plans to make any "versahub" styled pulleys. Would love some insight if possible.

pfreivald 07-12-2012 12:24

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by jb1403 (Post 1199547)
I am also very curious about this, I think a lot of teams are going to start using belts in the future and was wondering if there were plans to make any "versahub" styled pulleys. Would love some insight if possible.

If you hex broach the Gates pulley, then all you need is a clip ring or a spacer and you're good to go, right? (It's possible -- always -- that I'm missing something...)

JB 07-12-2012 12:38

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by pfreivald (Post 1199549)
If you hex broach the Gates pulley, then all you need is a clip ring or a spacer and you're good to go, right? (It's possible -- always -- that I'm missing something...)

Yes that should work... but it would be cool to have it lock in place the the gears do, just a thought. On a side note I absolutely love the entire product line and can't with to see these things in action.

Chris is me 07-12-2012 12:58

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by jb1403 (Post 1199552)
Yes that should work... but it would be cool to have it lock in place the the gears do, just a thought. On a side note I absolutely love the entire product line and can't with to see these things in action.

I don't really get what this adapter would do. If you're going through a hex broached pulley, you already have a system to both transmit torque and pilot your sprocket. If you wanted to go dead axle, you'd have to mill VersaPockets yourself. I don't really see how you could add something to make it work.

Either way, you need to machine the Gates part, so pick your poison.

Jared Russell 07-12-2012 13:13

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Yeah, a 5mm pitch, 15mm wide GT2 pulley (say 30 tooth? something big enough to have a 1.125 bore and VersaKeys) that was injection molded out of glass-filled nylon would be a fantastic addition. See what you've done to me VexPro...now all I want is more!

Timz3082 07-12-2012 14:36

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1199544)
The mounting hardware is not included with the hub.

Just wondering if a selection of #8 bolts will be available through vex pro? It would simplify the wondering process and cut on shipping costs!

I also just wanted to say, nice work! You can tell that the whole line has room for expansion, and the available products, well, are irresistible!

Great job guys, you will be a major player this year, and I expect to see VexPro items on all winning robots ;)

JVN 07-12-2012 14:41

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Timz3082 (Post 1199571)
Just wondering if a selection of #8 bolts will be available through vex pro? It would simplify the wondering process and cut on shipping costs!

We have a few of those available already. :)
http://www.vexrobotics.com/vex/produ...rews-8-32.html

Every VEX Robotics Design System screw is 8-32.

Akash Rastogi 07-12-2012 15:34

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
I was interested in the mecanum wheels for a personal project and was wondering what type of rubber is used for the rollers as well as the hardness. Is it a material someone can commonly find and use to cast a mold?

Thanks!

M. Mellott 07-12-2012 15:38

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Love the new product lines, especially the VersaPlanetary Gearboxes! Do these gearboxes require any grease/lubricant, and if so, is it already applied to the gearbox when we receive it? I didn't see this mentioned in the product description, so I wanted to be sure.

Many thanks and much success on this new venture!

Ricky Q. 07-12-2012 16:06

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by timytamy (Post 1199504)
Curious about what kind of lead time/cut off you will have for international orders. Will you be able to ship to Aus before kickoff? If so when is the cut off date.

We will be able to ship items before kickoff, but please keep in mind the extended shipping times for international orders.

Shoot me a PM or contact our sales team directly and we can work with you.

Best,
Ricky

PAR_WIG1350 07-12-2012 16:24

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by scottandme (Post 1199434)
Current draw would be right under 40A at stall in low gear, which is ideal. Would have been near perfect for the 2012 game.

Current draw at stall does not change based on the gearbox. That means the stall current is 133 Amps per CIM at 12 volts.

=Martin=Taylor= 07-12-2012 17:57

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
About the VersaWheels:

Quote:

Custom "W" tread pattern is specially designed to maximize traction on FRC carpet.
I'm interested to hear more about the reasoning and research behind this.

There has been a lot of talk on these forums about the interaction between tread shape and the carpet.

Given the weight and cost, I would love to use these.

Andrew Lawrence 07-12-2012 20:24

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
I'm having problems with the .STEP file for the VersaWheel. It opens fine, except I keep getting the error telling me to 'check entities'. I'm using Solidworks 2013 on Windows 7 (run via Bootcamp on a Macbook). Everything else worked perfectly except the wheel. Is anyone else having this problem? If someone has successfully converted the .STEP file to a .sldprt file, I'd like to see if I can open that without error, since I haven't gotten far enough to the point where I can save as a .sldprt file.

Thanks!

O'Sancheski 07-12-2012 20:37

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by SuperNerd256 (Post 1199698)
I'm having problems with the .STEP file for the VersaWheel. It opens fine, except I keep getting the error telling me to 'check entities'. I'm using Solidworks 2013 on Windows 7 (run via Bootcamp on a Macbook). Everything else worked perfectly except the wheel. Is anyone else having this problem? If someone has successfully converted the .STEP file to a .sldprt file, I'd like to see if I can open that without error, since I haven't gotten far enough to the point where I can save as a .sldprt file.

Thanks!

When I downloaded the .step file it came with a separate folder labeled MAC OSX. I don't have a Mac so I couldn't tell you if that would solve the issue.

Andrew Lawrence 07-12-2012 20:39

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by O'Sancheski (Post 1199702)
When I downloaded the .step file it came with a separate folder labeled MAC OSX. I don't have a Mac so I couldn't tell you if that would solve the issue.

I noticed that, and when I tried opening the attached .step file, Soludworks stopped responding before it even started parsing the file.

O'Sancheski 07-12-2012 22:05

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by SuperNerd256 (Post 1199704)
I noticed that, and when I tried opening the attached .step file, Soludworks stopped responding before it even started parsing the file.

Just try opening the regular .step file.

Andrew Lawrence 08-12-2012 00:00

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by O'Sancheski (Post 1199733)
Just try opening the regular .step file.

Got it working thanks to Brandon Liatys. Thanks for the help, though.

NickCrispie 08-12-2012 00:25

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
What pressure is it designed to have if used with the 3/4" bore pancake pneumatic pistons?

ttldomination 08-12-2012 00:55

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Still wondering on how the Roughtop/Wedgetops will attach to these wheels..? I suppose it's a drill and rivet thing for now. :(

- Sunny G.

Brandon Holley 08-12-2012 04:50

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Paul Copioli (Post 1199531)
The user does not have to deal with the ball shift mechanism as that will be pre-assembled.

Paul

Thats awesome Paul. Thanks for the info.

-Brando

JVN 08-12-2012 11:38

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by ttldomination (Post 1199802)
Still wondering on how the Roughtop/Wedgetops will attach to these wheels..? I suppose it's a drill and rivet thing for now. :(

- Sunny G.

While the traction wheels are designed to use their own tires (which, I think lots of people will be VERY happy with once they have the opportunity to play with them) you can easily attach traditional roughtop or wedgetop treads.

The method I used:
1. Assemble the wheel.
2. Cut the tread to length.
3. Hold the tread in place with a few zip ties or a belt.
4. Drill holes through the ends of the tread through the wheel rim using a small pilot bit.
5. Fasten the tread to the wheel using rivets, or self-tapping plastic screws.
6. Remove the zip-ties.

I am experimenting with some self-tapping screws that work REALLY well. While I would personally use the VEXpro traction tires, we will make sure there will be good options available for those who want to use their own tread.

-John

AdamHeard 08-12-2012 12:14

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1199842)
While the traction wheels are designed to use their own tires (which, I think lots of people will be VERY happy with once they have the opportunity to play with them) you can easily attach traditional roughtop or wedgetop treads.

The method I used:
1. Assemble the wheel.
2. Cut the tread to length.
3. Hold the tread in place with a few zip ties or a belt.
4. Drill holes through the ends of the tread through the wheel rim using a small pilot bit.
5. Fasten the tread to the wheel using rivets, or self-tapping plastic screws.
6. Remove the zip-ties.

I am experimenting with some self-tapping screws that work REALLY well. While I would personally use the VEXpro traction tires, we will make sure there will be good options available for those who want to use their own tread.

-John

The tires are very exciting to me, I can't wait for the results of your traction tests!

dag0620 08-12-2012 12:33

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Just want to add in my excitement for this! Being from an electrical background I'm obviously more excited about the Jag's and Victor 888's, but still very awesome!

Thanks Vex and IFI!!!

Redo91 08-12-2012 14:41

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
I am really excited to see the supply of gears available. There isn't anyone that I know of with such a large range of gears for the prices they have.

ksafin 08-12-2012 20:15

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Wow, this is mind blowing.

Huge thanks to IFI & Vex.

On another note, what say you all about the Mecanum wheels on VexPro? Significantly cheaper, so I'm wondering there's any tradeoff or if this is just a godsend.

JVN 08-12-2012 20:44

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by ksafin (Post 1199959)
On another note, what say you all about the Mecanum wheels on VexPro? Significantly cheaper, so I'm wondering there's any tradeoff or if this is just a godsend.

It's funny... we actually had this discussion during the pricing meeting.
"If we go with that price, will people think they're crappy? Should we just price them higher and make sure that people understand the quality level we're going for?"

We decided to go with the low price and hope that the community will understand that just because they're inexpensive, doesn't mean they're cheap.

-John

ksafin 08-12-2012 20:55

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1199972)
It's funny... we actually had this discussion during the pricing meeting.
"If we go with that price, will people think they're crappy? Should we just price them higher and make sure that people understand the quality level we're going for?"

We decided to go with the low price and hope that the community will understand that just because they're inexpensive, doesn't mean they're cheap.

-John

Haha, interesting coincidence :)

Well, that's just phenomenal! We're a second year team with a tight budget but were giving a strong look at using mecanums this season (barring any circumstances that would make it a bad choice in the game this year) but the pricetag of over $400 was hefty one.

Glad to see some great quality wheels at an even greater quality price - can't wait to get our hands on some!

pfreivald 08-12-2012 21:01

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1199972)
It's funny... we actually had this discussion during the pricing meeting.
"If we go with that price, will people think they're crappy? Should we just price them higher and make sure that people understand the quality level we're going for?"

We decided to go with the low price and hope that the community will understand that just because they're inexpensive, doesn't mean they're cheap.

-John

Great to hear! We're now re-designing our already re-designed octocanum drive to incorporate the IFI mecanum wheels. Expect an order next week! :)

Kevin Kolodziej 09-12-2012 00:48

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1199232)
Hi Kevin,
It is tough to provide a load capacity on something like a wheel. I can tell you that these were designed with FRC applications in mind. They're built to be tough, and survive even the worst of what FRC teams will throw at them.

They're not built to be used as an all-terrain wheel-chair or something... they might work for that, but that isn't their designed usage.

Does that kind of answer your question? Is there a specific value you're interested in?

-John

Hi John,

I think others and you have fleshed out most of the ideas behind this, but I do still have a few questions about longevity of the mecanum wheels. Are the rollers molded directly to the axle? What material is that axle? I expect it will be able to handle normal driving conditions just fine but what about after 3 or 4 competitions...can rollers be replaced? More importantly, can an axle be replaced if it is bent? The body and spokes of the wheel does not concern me at all. We've had bent and bound rollers before but they were easily replaced.

Thanks for all the information you and the rest of the VexPro team are providing on these products!!

Kev

JVN 09-12-2012 23:31

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1199227)
4. Yes, the hexes will all be aligned with the VersaKey pattern in a common configuration. Mounting multiple hubs on the same wheel will "just work."

-John

All,
I've been updated on this -- though this was our original intent, it proved cost prohibitive to do this. The hexes and VersaKeys will NOT be consistently aligned.

-John

AdamHeard 09-12-2012 23:37

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1200285)
All,
I've been updated on this -- though this was our original intent, it proved cost prohibitive to do this. The hexes and VersaKeys will NOT be consistently aligned.

-John

IF this is the case, what is your recomended method for mounting a 4x2 traction wheel live axle. A single hub?

thefro526 09-12-2012 23:39

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1200285)
All,
I've been updated on this -- though this was our original intent, it proved cost prohibitive to do this. The hexes and VersaKeys will NOT be consistently aligned.

-John

John, Now that the hexes and Versakeys will not be consistently aligned, how would you recommend doing the following:



(Picture is of a gear being used on one side of a wheel, versakey on the other, just in case the photo gets removed/updated to reflect changes)

Would you replace one of the hex hubs with a bearing hubs and then rely on the gear's hex and VersaKeys to transmit Torque?

Andrew Lawrence 09-12-2012 23:40

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Do you plan on releasing different sizes and widths for the VersaWheels?

nahstobor 09-12-2012 23:51

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
When will the CAD model of the Single Speed, single reduction transmissions be available?

JVN 09-12-2012 23:54

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by AdamHeard (Post 1200286)
IF this is the case, what is your recomended method for mounting a 4x2 traction wheel live axle. A single hub?

A single hub is more than enough to transfer the torque. So I would recommend a single hub, and a hex bearing for piloting on the other side.

JVN 09-12-2012 23:57

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by SuperNerd256 (Post 1200288)
Do you plan on releasing different sizes and widths for the VersaWheels?

Not for this season. We made the VersaWheel in a very universal size which we thought teams would use -- for other sizes we have the traction wheels:
http://www.vexrobotics.com/vexpro/wh...on-wheels.html

JVN 10-12-2012 00:00

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by thefro526 (Post 1200287)
John, Now that the hexes and Versakeys will not be consistently aligned, how would you recommend doing the following:



(Picture is of a gear being used on one side of a wheel, versakey on the other, just in case the photo gets removed/updated to reflect changes)

Would you replace one the hex hub with a bearing hub and the rely on the gear's hex and VersaKeys to transmit Torque?

Yes, that's exactly what I'd do. The single gear is more than enough to transmit the torque. You may just need a pilot on the other side, depending on the width of the wheel.

-John

Aren_Hill 10-12-2012 00:11

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Turns out a 1/2" hex bearing on the other side to pilot is more cost effective than another hub anyways.

Paul Copioli 10-12-2012 03:01

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by AdamHeard (Post 1200286)
IF this is the case, what is your recomended method for mounting a 4x2 traction wheel live axle. A single hub?

The hub designs are such that only one side needs a Versahub to transfer the torque. We initially intended that the hex would be timed to a certain VersaHub feature, but we quickly realized that we could not meet our pricing targets with such a requirement so we relaxed the requirement.

Our reasoning for relaxing the requirement was that since the full torque load could be taken by one hub, then a hex bearing can be used on the other side if you are worried about deflection. As it turns out, the bearing solution is less expensive for the customer anyway.

Paul

AdamHeard 10-12-2012 11:16

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Paul Copioli (Post 1200331)
The hub designs are such that only one side needs a Versahub to transfer the torque. We initially intended that the hex would be timed to a certain VersaHub feature, but we quickly realized that we could not meet our pricing targets with such a requirement so we relaxed the requirement.

Our reasoning for relaxing the requirement was that since the full torque load could be taken by one hub, then a hex bearing can be used on the other side if you are worried about deflection. As it turns out, the bearing solution is less expensive for the customer anyway.

Paul

Thanks. I wasn't worried about torque, but supporting the shaft on the other side. For some reason I thought the wheel bores were 1.25, not 1.125. What you and John suggest is a really clean solution, I like it.

Jared Russell 10-12-2012 11:35

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by AdamHeard (Post 1200365)
Thanks. I wasn't worried about torque, but supporting the shaft on the other side. For some reason I thought the wheel bores were 1.25, not 1.125. What you and John suggest is a really clean solution, I like it.

It's also a great use for the handful of seized hex bearings we have collected through the years.

JVN 10-12-2012 11:45

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
A few people asked about whether we would sell the shifter shafts independently. The answer is "yes" and they're already live on the site (linked from the kit contents section of the Ball Shifter page).

Short Output Shaft (w/ gears) -- as used in the 3-stage gearbox.
http://www.vexrobotics.com/vexpro/ge.../217-2793.html
Without gears... just the shaft:
http://www.vexrobotics.com/vexpro/ge.../217-2791.html

Long Output Shaft (w/ gears) -- as used in the 2-stage gearbox.
http://www.vexrobotics.com/vexpro/ge.../217-2792.html
Without gears... just the shaft:
http://www.vexrobotics.com/vexpro/ge.../217-2790.html

-John

Donut 10-12-2012 12:42

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1200285)
All,
I've been updated on this -- though this was our original intent, it proved cost prohibitive to do this. The hexes and VersaKeys will NOT be consistently aligned.

-John

Does this apply to the 1/2" keyed hubs as well? I am assuming so but wanted to confirm anyway.

JVN 10-12-2012 13:07

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Donut (Post 1200467)
Does this apply to the 1/2" keyed hubs as well? I am assuming so but wanted to confirm anyway.

Yes, this applies to those.

M. Mellott 10-12-2012 13:17

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Bumping this post/question...

Quote:

Originally Posted by M. Mellott (Post 1199582)
Love the new product lines, especially the VersaPlanetary Gearboxes! Do these gearboxes require any grease/lubricant, and if so, is it already applied to the gearbox when we receive it? I didn't see this mentioned in the product description, so I wanted to be sure.

Many thanks and much success on this new venture!


Andy Baker 10-12-2012 13:42

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Paul Copioli (Post 1200331)
We initially intended that the hex would be timed to a certain VersaHub feature, but we quickly realized that we could not meet our pricing targets with such a requirement so we relaxed the requirement.

Paul

For those folks who need this alignment requirement, the hubs at AndyMark meet this need. Previously, our hubs did not align with the holes, but they do now. I pulled 19 off of our shelf and put them on a Cross Hex Tube. These are in stock now:



Sincerely,
Andy Baker

AllenGregoryIV 10-12-2012 13:51

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
JVN or Paul, can you explain how the VersaPlanetary motor connectors work? I've looked through the CAD and I see the set screw, the collar type thing with the slit and the place that it goes. My real question, "is the setscrew the only thing keeping the motor engaged?" I do like the access holes for the setscrew, and that you can swap motors with out removing the gearbox from the robot.

I'm excited to get VEXpro parts in.

JVN 10-12-2012 14:24

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Kevin Kolodziej (Post 1200020)
I think others and you have fleshed out most of the ideas behind this, but I do still have a few questions about longevity of the mecanum wheels. Are the rollers molded directly to the axle? What material is that axle? I expect it will be able to handle normal driving conditions just fine but what about after 3 or 4 competitions...can rollers be replaced? More importantly, can an axle be replaced if it is bent? The body and spokes of the wheel does not concern me at all. We've had bent and bound rollers before but they were easily replaced.

Hi Kevin,
The axle is 5mm #45 steel. If you check out the CAD model, you can see how the axle is supported much further out than you might expect due to some creative design of the cast aluminum roller support; the bending moment on these axles is greatly reduced. We experimented with this geometry when designing the Mecanum Wheels for the VEX Robotics Design System, and liked it so much we carried it forward to the VEXpro line.



The rollers will be made from rubber co-molded onto a plastic shell. The shaft is knurled on each end and press-fit into two of these plastic shells. We will offer a replacement roller-assembly pack which includes some TBD quantity of roller-axle-bracket assemblies.



Yes, we expect it to handle 3-4 competitions "no problem." Yes, we will provide a mechanism to replace the rollers if you want fresh ones.

Does that answer your question somewhat? I will have quantitative load ratings for you sometime in the coming weeks.

-John

JVN 10-12-2012 15:33

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by M. Mellott (Post 1199582)
Love the new product lines, especially the VersaPlanetary Gearboxes! Do these gearboxes require any grease/lubricant, and if so, is it already applied to the gearbox when we receive it?

Mike,
For our gearboxes with aluminum gears, the teflon infused ceramic coating greatly increases the wear resistance of the gears. That said, teams should probably apply a light coating of white lithium grease to ensure longevity. We know many of you will want to be able to use these items for many years, and this will help make that possible.

The VersaPlanetary gearboxes use high-strength hardened steel gears.

At this time, we are not planning to grease the gears before shipping.

-John

billbo911 10-12-2012 16:21

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
John,
With the addition of all these great new gearing options, is it possible you might want to make a newer version of your "JVN-DesignCalc.xls" that is defaulted with the "Ball Shifter" specs?
I know I can work with the current version by dropping in the numbers, but having the default already have the basics in there would make things even better, IMHO.

ksafin 10-12-2012 19:59

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Hey, I have a quick inquiry about the Mecanum wheels..

I read on the description that they're optimized for the FRC carpet. This is good and all, but how do they fare on other surfaces, like concrete? We like to demo our robots in the courtyard of our school, which is concrete.

I'm just concerned that the rubber rollers may not fare too well, and I'd love to know before I put in my order.

Thanks!

Paul Copioli 10-12-2012 20:30

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by AllenGregoryIV (Post 1200508)
JVN or Paul, can you explain how the VersaPlanetary motor connectors work? I've looked through the CAD and I see the set screw, the collar type thing with the slit and the place that it goes. My real question, "is the setscrew the only thing keeping the motor engaged?" I do like the access holes for the setscrew, and that you can swap motors with out removing the gearbox from the robot.

I'm excited to get VEXpro parts in.


Allen,

The motor connection that the VP uses is one of the more counter intuitive engineered items I have come across in my time as an engineer. This technology is used on industrial robotic gear boxes all over the world and is becoming the common adapter for high rigidity, low backlash applications.

There are two basic principles at work:

(1) The motor pilot is not used, but the shaft is actually used as the pilot.

(2) The set screw really isn't used as normal set screw (clamping on a rigid shaft). It is used as a clamping lever to squeeze the C-coupling into an ellipse.

The C-coupler (collar type thing with the slit) and the input collar (the thing the C-coupler fits into are precision machined for an exact slight clearance. In addition, you use a specific C-coupler based on the motor shaft diameter. There is a different coupler for 3mm, 1/8", 1/8" with knurl, and 5mm shafts all with the same OD so they fit in the input collar. The clamping screw is tightened (don't really need that much tightening torque) and turns the C-coupler into an ellipse which locks it in place with no backlash. I have accidentally hand tightened a coupler before and it still locks solid. It took me over 9 months of rigorous testing when I was at FANUC to approve this technology for use on our robots, but after the testing I was sold. easy for replacing bad motors, easy for replacing the gear sets, and no more press fitting gears on motor shafts.

Now for high end motors like industrial robots use, this next benefit really isn't a benefit, but for some of the less expensive, non-high tolerance motors we use in FRC, I have found that this next benefit is really helpful:

Since you do not have to completely clamp the motor face to the VP mounting face, any shaft runnout misalignment between the motor shaft and motor mounting face is completely mitigated by just hand tightening the mounting motor plate mounting screws. Since the screws only act to keep the motor case from spinning, they only need a little loctite and hand tightening.

We will have detailed diagrams on how this all works prior to kickoff.

Paul

ksafin 10-12-2012 21:41

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Was the question of belt sprockets w/ VersaHubs already addressed? We want to use belts this year, how would this work with VersaHubs?

Aren_Hill 10-12-2012 21:48

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by ksafin (Post 1200754)
Was the question of belt sprockets w/ VersaHubs already addressed? We want to use belts this year, how would this work with VersaHubs?

All of the CAD models are available, if I end up using pulleys with them for any reason I will just be machining the versahub pattern into my own pulleys. But I've got CNC access.

With a lathe you could bore out a pulley to fit over one of the versahub bosses and put a bolt pattern in it if you just have access to manual machines.

JB987 10-12-2012 21:49

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by ksafin (Post 1200754)
Was the question of belt sprockets w/ VersaHubs already addressed? We want to use belts this year, how would this work with VersaHubs?

If you are using a live axle and hex or key the sprocket depending on use of keyed shaft or hex shaft, you wouldn't have to worry about attaching the sprockets...a dead axle set up can be done but the alignment and placement of mounting holes needed to modify a sprocket can be challenging.

Kevin Kolodziej 11-12-2012 00:37

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1200516)
Does that answer your question somewhat? I will have quantitative load ratings for you sometime in the coming weeks.

-John

John,

Consider my questions answered! Thanks for all the detailed information. I did pick around the CAD file a little bit, but I wasn't quite sure what all was what. Now I just have to convince the team that mecanums aren't as bad as everyone says they are (you'd think our track record with them would be enough...but no) :D

AllenGregoryIV 11-12-2012 01:39

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Paul Copioli (Post 1200707)
Allen,

The motor connection that the VP uses is one of the more counter intuitive engineered items I have come across in my time as an engineer. This technology is used on industrial robotic gear boxes all over the world and is becoming the common adapter for high rigidity, low backlash applications.
...
Paul

Thanks for the explanation Paul, That's how I sort of thought it worked and I figured you guys knew something (a lot of things) I didn't. It seems like the perfect solution for FRC robots and it should make it so much easier for teams. My need for an arbor press in the pits just halved. The wheel bearings aren't press fits, right? I might be completely done with the arbor press if that's true.

Paul Copioli 11-12-2012 02:33

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Wheel bearings are not press fits. They are light transition fits, where if the bearing is at its largest and the wheel is at its smallest you may have to press it in by hand.

The tolerances are such that the worst case is a 0.0005" interference. The way the plastic geometry is designed will allow even this interference case to be hand pressed.

Tristan Lall 11-12-2012 05:21

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by Paul Copioli (Post 1200707)
Since you do not have to completely clamp the motor face to the VP mounting face, any shaft runnout misalignment between the motor shaft and motor mounting face is completely mitigated by just hand tightening the mounting motor plate mounting screws. Since the screws only act to keep the motor case from spinning, they only need a little loctite and hand tightening.

Am I understanding correctly that the motor is essentially floating, and any shaft runout is taken up by the flexure of the motor shaft, the play in the bearing and the play in the spline?

(And it works fine without a fancy spherical-race bearing, because the runout is so small?)

smistthegreat 11-12-2012 21:44

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by nahstobor (Post 1200291)
When will the CAD model of the Single Speed, single reduction transmissions be available?

Bumping this question, because I haven't seen an answer to it yet. Apologies if it's been answered, but I couldn't find a response in this thread and the model isn't on the website.

DonRotolo 11-12-2012 22:49

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
JVN & team:

For the ball shifter, the recommended Grayhill 63R encoders seem to be a bit expensive, about $65 or so. The US Digital encoders are half that. Why is the Grayhill encoder recommended?

If we choose the US Digital encoder, do you expect it to be 'easy' to mount to the shifter?

Concerning the 2-stage ball shifter with long output shaft, am I correct in assuming a (1/2") hex bearing might be needed to support the far end of the shaft, and that it is not included?

Thanks,
Don

NobleActual 11-12-2012 22:54

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
One of the first things I thought.....hmmmm seems a lot like apple's video's!

Amazing products though, and awesome prices, it'll really be interesting this year to see what teams decide to build or buy. I think they'll be some tough choices!

JVN 11-12-2012 22:55

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by DonRotolo (Post 1201140)
JVN & team:

For the ball shifter, the recommended Grayhill 63R encoders seem to be a bit expensive, about $65 or so. The US Digital encoders are half that. Why is the Grayhill encoder recommended?

If we choose the US Digital encoder, do you expect it to be 'easy' to mount to the shifter?

Concerning the 2-stage ball shifter with long output shaft, am I correct in assuming a (1/2") hex bearing might be needed to support the far end of the shaft, and that it is not included?

Thanks,
Don

Hi Don,
We have provided mounting in the kit for both encoders. We don't prefer one or the other, but of the myriad of Grayhill encoders, that model is the one we recommend.

If you look on the shifter page you can see we have CAD files posted showing the shifter with each encoder type mounted (one CAD model with Grayhill, one with US Digital).

Concerning the long output shaft on the 3-stage:
It depends on the loading application. What do you intend?
That shaft is double supported by 1/2" bearings, so many applications would not require additional support.

-John

DonRotolo 12-12-2012 22:46

Re: VEX Robotics Relaunches VEXpro Product Line with over 120 New & Improved Products
 
Quote:

Originally Posted by JVN (Post 1201147)
Concerning the long output shaft on the 3-stage:
It depends on the loading application. What do you intend?
That shaft is double supported by 1/2" bearings, so many applications would not require additional support.

More hypothetical than anything. Perhaps a better wording would be "IF I wanted to support the far end of the shaft, would a half inch hex bearing be appropriate?"

Thanks for the other responses John, that's really helpful information.


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