2264 dual fp lift gearbox.

[vivek16]

Well, I finally got the darn thing built!

http://i200.photobucket.com/albums/aa287/vivek_chittineni/FINALRENDER.jpg

http://i200.photobucket.com/albums/aa287/vivek_chittineni/DSCN7921.jpg

http://i200.photobucket.com/albums/aa287/vivek_chittineni/DSCN7923-1.jpg

http://i200.photobucket.com/albums/aa287/vivek_chittineni/DSCN7924-1.jpg

Here is a link to a video of it in action:
http://s200.photobucket.com/albums/aa287/vivek_chittineni/?action=view&current=DSCN7925.flv

It could use some grease but it works. :)

thanks, Vivek

[cdennisxlx2]

Very nice guys, great design and a great machining job.

[Richard McClellan]

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]

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=]

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.]

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]

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]

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]

so pretty... alright, im jealous.

Hey, I recognize that drive...

[ducttapedude]

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]

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]

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]

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]

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]

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]

ok well nevermind. still looks great. and i have to say great quality pictures

[vivek16]

so pretty... alright, im jealous.

Hey, I recognize that drive...

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

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]

Great work! Its nice to see that your team kept active over the summer.

[vivek16]

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.]

What gears did you use and what were the specs on them.

[vivek16]

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.]

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]

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.]

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]

.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]

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]

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