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Unread 20-02-2013, 20:14
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AKA: Simon Bohn
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Re: Banebots RS775-12 and 775-18

I guess I still don't get it. The power of a RS775-12 is in the range of 75 W while the 775-18 is 270 W. If the one on the PG71 is closer to a 775-12 then shouldn't its power be around there?

I should probably explain more the issue we're having. We were using a PG71 with an AM9015 to rotate and hold the position of our shooter (think motor hooked up directly to the side of it, rotating the whole shooter/hopper assembly). We had a PID loop running with a potentiometer directly to the jaguar but due to some mechanical stupidity managed to mangle the pot (rotated beyond its range). We switched to manual control and after about 10 minutes of use, the motor started smoking. I guess my first question should be to ask why do you guys think this happened.

I understand that it was our own bad design and mechanical disadvantage that caused the problem but at this point, our only solutions are workarounds. Our current thought is to put on a PG188 and let the increase in torque traded for speed that we didn't need help us.

I guess the other question to ask is general motor theory: What goes on inside the motor current and heat wise when we run it at say 30% to hold a position? Does it depend on how much load is actually put on it? How would we calculate this based on the lever we've created?