[Oblarg]

Originally Posted by dellagd

As I'm sure some of you guys are I have been having some fun lately going through CAD'ing different possible drive train designs. I have a few concerns though.

Three questions:

1) What is a good goal for total weight of the drive train? This would include all frame, wheel, axle, gearing, and motors.

2) I've seen lots of discussion on the smallest you should make your pulleys on a belt driven drive train. Would I be safe to use 18T Pulleys on an exact c-c distance setup with 15mm belts? I know you definitely shouldn't go that small with 9mm.

3) Should I be using the WCP Belt Calc to get me exact c-c distance or do I need to do some more calculations?

Hopefully you drive train guys out there can give me a hand. Thanks!

You can find the rated torques for HTD belts here. You should be able to calculate the peak torque you could see in your drive train from your robot weight, wheel size, and wheel COF. Bear in mind that these ratings are a bit conservative - since the service life of belts in FRC is so short, you can likely push it a bit.

The WCP belt calc works fine.