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Unread 23-06-2013, 03:43
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Travis Covington Travis Covington is offline
Engineering Mentor
FRC #0254
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Re: 254 telescoping arm design choices?

Quote:
Originally Posted by smart1 View Post
I am curious to know what type of belt 254 used this year and why they chose it. I'm also interested what the rollers are made of. Thanks
The belt is a GT2 5mm pitch x 15mm wide gates timing belt. We used it because it was the smallest available size to allow for a moderate Factor of Safety for one arm to lift the entire robot.

The rollers are simply sleeve bushings (SAE 841 oil impregnated bronze) on an aluminum shaft. We wanted to use delrin rollers on the shafts, but had no desire to machine them ourselves. The bronze rollers were not ideal, but they worked fine.

Hope this helps.
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-Travis Covington

2008-2017 - Engineering Mentor of Team 254
2001-2008 - Engineering Mentor of Team 968
1998-2001 - Mechanical Director/Driver/Member of Team 115