pic: Wide base robot CAD

[CNettles11]

Originally Posted by artdutra04

1. What is the gear ratio for the drive base? Are the CIM shafts long enough to do what you propose?

2. Why is each wheel individually powered? If the gear ratios are what they appear to be (AndyMark CIMple Box), why not just mount that on the chassis and run roller chain to the wheels?

3. You should move your wheels to as close to the front/back ends of the robot as possible to lengthen the wheelbase. If you actually built a FRC robot with this drive base as shown, whenever you would rapidly change direction, at best the robot will tip enough for the frame will dig into the carpet momentarily, at worst you will entirely tip over.

1) The gear ratio is the same as the 2011 KoP CIMple Box, The CIM shafts aren't long enough to use normal gears. I've been brainstorming a way to either have the gears cantilevered off of the CIM shaft somehow or to just have the CIM motors mounted over the frame rails instead of through the frame rails.

2)I was trying to save as much weight as possible in this design and calculated from the Autodesk Inventor material properties that it would be lighter to have a gear on each wheel instead of using the gearboxes.

3)My train of thought was that if this robot were to have 8 inch wheels on it instead of 4 inch wheels, the wheels would be touching the ground in the same place and there would be no difference between 4 and 8 inch wheels with this wheelbase.

This feedback is greatly appreciated!