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Unread 04-11-2013, 20:27
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BurkeHalderman BurkeHalderman is offline
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Re: pic: Team 3266 Sheet Metal Drivetrain

Quote:
Originally Posted by AdamHeard View Post
For that price, I'd buy these pulleys from AM and bolt them to this hub from WCP.
From searching through the forums and reading all the posts about belt drives it was my understanding the GT2 profile and 9mm wide belts were the preferred setup for a FRC application, while the AM pulleys are HTD pulleys made for 15mm wide belts I would like to use the GT2 9mm belts as their smaller but the AM solution is tempting. Do you think the different profiles would have a noticeable difference?

Quote:
Originally Posted by Chris is me View Post
This is very similar to 2168's drivetrain this year. Check them out if you can.

I don't think having CIM relief pockets in the belly pan is going to drastically compromise rigidity. Being able to "drop out" the transmission can be really useful. You may want to make the cutouts around that access hole a little less aggressive, and possibly consider an additional cross member if your manipulator won't already serve that purpose. The Andymark Cross Hex stuff that comes with those gearboxes in the kit would be an easy way to add some cross support.
It is actually heavily influenced from 2168's 2013 drivetrain. The credit for the pulley hub design belongs to them, and the weight reduction was influenced from their 2011 drivetrain. They were nice enough to send me their 2013 CAD and I learned a lot about sheet metal construction from taking it apart and figuring out how it all went together.

And that is the reason I have the pockets in the belly pan, so the gearboxes can be dropped out of the bottom of the frame for easy maintenance. As far as being a little less aggressive do you mean making the pocketing smaller?
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[2010-2014]: FRC 3266 Robots-R-Us: Founder and Alumni
2010 (5-5-1): Buckeye Regional; Driver
2011 (4-5-0): Buckeye Regional; CORI; CAGE Match; Drivetrain/Manipulator Operator
2012 (7-13-0): Buckeye Regional; Queen City Regional; CAGE Match; BPRC; Drivetrain Operator
2013 (25-15-1): Queen City Regional; Buckeye Regional; Crossroads Regional; CORI; Ohio State Champs; CAGE Match; BPRC; Drivetrain Operator
2014 (21-10-0): Crossroads Regional; Queen City Regional; Designer; Mechanical/Design Mentor

Founding an FRC team as an 8th grader sure wasn't easy, but it was totally worth it.

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