Motors not running full speed?

[billbo911]

Originally Posted by team3511

The speed difference is noticeable. Last year we could spin the tires in place if we really wanted, now it's hardly moving fast enough to keep up with someone walking.

We're using the CIM motors and toughboxes from andymark. Not sure of the gear ratios.

Will do more testing on the Jags' outputs tomorrow.

Assuming everything other than the ToughBox is from the KOP:


Let's start with some basic math. Last year's KOP transmission used a 4.66:1 ratio. It drove 8" wheels through a 2.17:1 chain sprocket reduction. So the overall reduction was 10.1:1 to 8" wheels. So for every revolution the motor makes, the wheel turns 2.49".

An AndyMark ToughBox has 12.75:1 reduction. Add to that the 2.17:1 chain sprocket reduction and the overall drive train reduction would be 27.66:1 driving 6" wheels. So for every motor revolution you get .68 inches of travel.

Yep, way slower. But, you might be able to climb a wall with that drive train!