30-01-2014, 18:33
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no bag, vex only, final destination
AKA: Pinecone
 FRC #0228 (GUS Robotics); FRC #2170 (Titanium Tomahawks) Team Role: Mentor
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Join Date: Dec 2008
Rookie Year: 2006
Location: Glastonbury, CT
Posts: 7,630
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Re: Window Motor will not lift ball anymore. It did, but it wont any more.
Are you gearing the arm directly to the window motor? This is bad bad bad. You need at the very least a healthy sprocket reduction.
When we used window motors on our 2011 arm, even with a reduction and counterbalancing the motors would wear out about once per regional. Basically they would get very hot and then just stop working like yours seems to have. I would not do a window motor arm again unless it was very short and / or a ton of reduction was added to the motor.
With the high number of COTS gearboxes that are available to accomplish high reductions, you have a number of other options to consider that use a higher power motor more safely. You will likely need to combine products (e.g. a VersaPlanetary + a spur gearbox) but it's very doable.s
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