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-   -   2264 dual fp lift gearbox. (http://www.chiefdelphi.com/forums/showthread.php?t=68968)

vivek16 27-08-2008 23:20

2264 dual fp lift gearbox.
 
Well, I finally got the darn thing built!









Here is a link to a video of it in action:
http://s200.photobucket.com/albums/a...t=DSCN7925.flv

It could use some grease but it works. :)

thanks, Vivek

cdennisxlx2 28-08-2008 00:02

Re: 2264 dual fp lift gearbox.
 
Very nice guys, great design and a great machining job.

Richard McClellan 28-08-2008 00:35

Re: 2264 dual fp lift gearbox.
 
How did you make those linear (but curved) slides? It looks kind of like a garage door guide with rollers in it. Looks cool!

Qbranch 28-08-2008 00:43

Re: 2264 dual fp lift gearbox.
 
FP motors really belt out the Wo when you let them run in their happy-RPM-zone. Great Design!

We used a pair of FP's to run our speedy arm up and down this year.

-q

=Martin=Taylor= 28-08-2008 01:01

Re: 2264 dual fp lift gearbox.
 
Cool. Does it actually toss the ball or just lift it up?



We used 2 CIMs in our lift. 11 feet in 2 seconds is scary :ahh:

,4lex S. 28-08-2008 10:53

Re: 2264 dual fp lift gearbox.
 
Wow, that is an impressive bit of design and execution. I was thinking about getting the new members to design something like that for the coming year, and after seeing the effectiveness of this one... thats a definite.

One question though; have you had any issues yet with the shaft collars at the top basically acting as plate spacers, or have they behaved themselves?

vivek16 28-08-2008 11:52

Re: 2264 dual fp lift gearbox.
 
The sides are garage rail. They were donated to the team and were quite effective.

Thanks, The side plates were waterjet (the bearing holes were put in manually) and the gears were from AM. I did spend a couple of months designing this thing. If we were to pull this off during build season, the process would have to be expedited tenfold for it to be done on time. It was a really good learning experience though.

thanks, Vivek

vivek16 28-08-2008 11:53

Re: 2264 dual fp lift gearbox.
 
Quote:

Originally Posted by ,4lex S. (Post 763126)
Wow, that is an impressive bit of design and execution. I was thinking about getting the new members to design something like that for the coming year, and after seeing the effectiveness of this one... thats a definite.

One question though; have you had any issues yet with the shaft collars at the top basically acting as plate spacers, or have they behaved themselves?

Actually, there are 5 other standoffs spaced around the gearbox. Those were just to hold the idler sprockets in place.

thanks, Vivek

AndyB 28-08-2008 12:35

Re: 2264 dual fp lift gearbox.
 
so pretty... alright, im jealous.

Hey, I recognize that drive...

ducttapedude 28-08-2008 15:46

Re: 2264 dual fp lift gearbox.
 
Quote:

Originally Posted by vivek16 (Post 763136)
The sides are garage rail. They were donated to the team and were quite effective.

Thanks, The side plates were waterjet (the bearing holes were put in manually) and the gears were from AM. I did spend a couple of months designing this thing. If we were to pull this off during build season, the process would have to be expedited tenfold for it to be done on time. It was a really good learning experience though.

thanks, Vivek

From what it sounds like/looks like you machined out the holes for the bearings and used a couple that didn't have flanges on them.

Our team for numerous years...just so you know for an option, has waterjetted out plates and just reamed out the holes, even the bearing holes and it's always been fine, we've never had a gearbox fail.

Also, flanged bearings everyhwere can really make something easier to assemble, and to dissasemble.

Just some thoughts that might be helpful later.
It looks like a really nice design, very good drawing, and just a plain pretty piece. :)

Alex Cormier 28-08-2008 16:29

Re: 2264 dual fp lift gearbox.
 
Quote:

Originally Posted by vivek16 (Post 763136)
The sides are garage rail. They were donated to the team and were quite effective.

Thanks, The side plates were waterjet (the bearing holes were put in manually) and the gears were from AM. I did spend a couple of months designing this thing. If we were to pull this off during build season, the process would have to be expedited tenfold for it to be done on time. It was a really good learning experience though.

thanks, Vivek

So what did the robot look like? Was there a different upper structure or just a different way to launch the ball?

AndyB 28-08-2008 17:44

Re: 2264 dual fp lift gearbox.
 
Quote:

Originally Posted by Alex Cormier (Post 763197)
So what did the robot look like? Was there a different upper structure or just a different way to launch the ball?

The robot looked the exact same. They were having trouble with their lift and decided to swap out the gearbox. The also changed their drive system from 5 omni wheels to a more traditional 2 wheel-2 omni drive.

vivek16 28-08-2008 18:38

Re: 2264 dual fp lift gearbox.
 
Quote:

Originally Posted by AndyB (Post 763212)
The robot looked the exact same. They were having trouble with their lift and decided to swap out the gearbox. The also changed their drive system from 5 omni wheels to a more traditional 2 wheel-2 omni drive.

yeah, we had 3 CIM's on the base and 1 CIM on our lift. We swapped the lift CIM out for the fps with the new gearbox. We now have a tank drive with 2 CIM's per side. Much better torque. The CIM's don't get as warm anymore :D.

I'm serious, we could cook hotdogs on them before.

-Vivek

bigbeezy 28-08-2008 18:51

Re: 2264 dual fp lift gearbox.
 
is that 3/8" aluminum plate on the gearbox? or something close? It looks really thick. What was the purpous for using that particular thickness rather than 1/4" (assuming that its not 1/4")

great cading, looks great

vivek16 28-08-2008 19:08

Re: 2264 dual fp lift gearbox.
 
It actually is 1/4. All of my pics are zoomed in a lot with high res so that might make it look thicker.

-Vivek

bigbeezy 28-08-2008 20:06

Re: 2264 dual fp lift gearbox.
 
ok well nevermind. still looks great. and i have to say great quality pictures

vivek16 28-08-2008 22:05

Re: 2264 dual fp lift gearbox.
 
Quote:

Originally Posted by AndyB (Post 763148)
so pretty... alright, im jealous.

Hey, I recognize that drive...

Haha, its an effective drive. What can I say?

Quote:

Wow, that is an impressive bit of design and execution. I was thinking about getting the new members to design something like that for the coming year, and after seeing the effectiveness of this one... thats a definite.
Thanks, if you need help please let me know. I couldn't have done it without CD's help. Mainly Molten (Jason), Craig Hickman, Jeff from 801, Chris L from 1114, and Andy Baker. There are many more but it really was a great learning experience. It was also my first major project in Inventor/CAD. It really helped, I feel a lot more confident about my ability to use Inventor. And to think 6 months ago, I would have been completely clueless about this stuff.

thanks, Vivek

Mark Holschuh 28-08-2008 22:40

Re: 2264 dual fp lift gearbox.
 
Great work! Its nice to see that your team kept active over the summer.

vivek16 28-08-2008 22:45

Re: 2264 dual fp lift gearbox.
 
Quote:

Originally Posted by Mark Holschuh (Post 763256)
Great work! Its nice to see that your team kept active over the summer.

Thanks, it has been a blast. How has your team been?

-Vivek

R.C. 29-08-2008 19:53

Re: 2264 dual fp lift gearbox.
 
What gears did you use and what were the specs on them.

vivek16 29-08-2008 21:30

Re: 2264 dual fp lift gearbox.
 
Quote:

Originally Posted by rc_cola1323 (Post 763369)
What gears did you use and what were the specs on them.

They were AM gears. 20dp. I used 2 12 teeth gears, 2 14, 3 50 tooth, and 1 45 tooth gear.

They came prebroached and are a good deal.

-Vivek

R.C. 29-08-2008 21:57

Re: 2264 dual fp lift gearbox.
 
Did you ever find the out how much torque you got out of the setup and what was the final rpms for the setup. BTW, it is a sweet setup.

vivek16 29-08-2008 23:56

Re: 2264 dual fp lift gearbox.
 
Quote:

Originally Posted by rc_cola1323 (Post 763377)
Did you ever find the out how much torque you got out of the setup and what was the final rpms for the setup. BTW, it is a sweet setup.

Yeah, this thing gets some serious torque. 2 fps through a 48:1 reduction get about 48 foot pounds if I'm doing my math right. 2(5.72*48)? Yeah. Final RPMs was around 333 I believe. I'm not taking efficiency or load into the equation but its pretty insane.

-Vivek

R.C. 30-08-2008 00:03

Re: 2264 dual fp lift gearbox.
 
I really like this design and how you incorporated the fisher price motors. I kinda wanted to make something, but a quick question how thick was the aluminum around the bearings and how thick were the lines connecting everything

vivek16 30-08-2008 00:12

Re: 2264 dual fp lift gearbox.
 
.25", I offset the bearing holes by .25 inches and worked around that. It took a while to get the webbing right but it's worth it. I made the top outer edges .375 but it really doesn't need that. .25 is good for the job.

-Vivek

AustinSchuh 30-08-2008 01:11

Re: 2264 dual fp lift gearbox.
 
Quote:

Originally Posted by vivek16 (Post 763376)
They were AM gears. 20dp. I used 2 12 teeth gears, 2 14, 3 50 tooth, and 1 45 tooth gear.
-Vivek

Impressive gearbox!

How did you interface to the FP motor? It sounds like you used AM components to do it. AM planetary gearbox? The gear that comes on the shaft of the FP? (If so, which off the shelf gears did you use to interface with that one?) I would have to guess from your pictures that you found the correct gear to interface to the FP themselves, but I can't really tell.

vivek16 30-08-2008 23:08

Re: 2264 dual fp lift gearbox.
 
Actually, Andy made me some 12 tooth gears with a 3mm bore. I later bored them out with a #30 bit since that was a good pressfit. I used medium loctite when pressing them on.

-Vivek

p.s. abrasive pads make everything shinier


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