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Unread 14-03-2012, 22:57
RRLedford RRLedford is offline
FTC 3507 Robo Theosis -- FRC 3135
AKA: Dick Ledford
FRC #3135 (Robotic Colonels)
Team Role: Mentor
 
Join Date: Jan 2010
Rookie Year: 2009
Location: Chicago, IL USA
Posts: 286
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Re: Cim-Sim gearbox for shooter questions

Quote:
Originally Posted by Ether View Post
Yes.

2.7 speed reduction on a 19300 rpm motor driving 8" wheels => high torque on pinion.

How much engagement was left of the pinion into the first-stage gear in the CIM-U-LATOR with those spacers?


The gear overlap was still >80% since we pressed the pinion on less far down the shaft to anticipate this. I was kind of suspecting over-torque was the culprit. We have the option to do a 2:1 further reduction by going 15 to 30 with the belt pulley pair, but will even this be enough? We could also add a flywheel to reduce the level of braking torque that the squished ball effect applies to the motors. We can also add a 2nd gearbox driving the other side of the wheel shaft to divide the torque loading that the motors see a factor of two.

Any suggestions on what order woulf be best for trying these options?

-Dick Ledford
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