I have a 6 wheel drive robot. And I use #25 chain to power all the wheels on each side.
(Small sprocket is 22t, large sprockets are 66t)
The 66t sprockets are all anchored to large 10" wheels
The 22t sprocket is fixed onto the CIM gearbox shaft.
Without the yellow idler rollers, the middle sprocket would have very poor chain contact.
However, I am experiencing two problems using this setup:
The chain still skips mainly due to the 22t sprocket being very small with few contact teeths. It stops if the chain is extremely tight, but that creates an enormous amount of friction. I am barley able to push the robot around when it is powered off due to the friction in the system.
The chain eats away at the plastic rollers slowly. I tried metal rollers, and those are being eaten away too. Perhaps I should try idler sprockets?
Thanks in advance
*note that this is a non-competition robot for fun. Hence all the custom non-legal parts