Re: How did you use the FP motors?
 

http://web.mit.edu/first/www/05media/crunch_001.jpg

Actually, those were toasted and later replaced with 12V's. Our arm runs on dual FP's with gearboxes and a ~16:1 sprocket reduction for extremely high torque. (~400 ft.-lbs. at max efficiency?)

Re: How did you use the FP motors?
 

Re: How did you use the FP motors?
 

234 used ours to lift our arm.
we also had to use the 12V motors.

Re: How did you use the FP motors?
 

We used 2 of them to winch up our arm. We can fully extend it in about 3-4 seconds (15 ft).

Re: How did you use the FP motors?
 

We didn't need them, we thought of using them but we went with a window motor instead.

Dave

Re: How did you use the FP motors?
 

We used an FP motor for the first time this year, to power our ball screw extension.

Picture 1

Picture 2

Re: How did you use the FP motors?
 

They power our arm.

Re: How did you use the FP motors?
 

469 decided to use their Fisher-Prices to power the winch- a critical element for raising and lowering our arm. They are coupled on opposite ends of a single shaft that carries a worm. It's speed is then reduced through a worm gear reduction (1:30) which rotates a drum to collect or release cable. I do not have pictures of it, but you can see it in action at Great Lakes, Detroit, and Atlanta.

_Alex

Re: How did you use the FP motors?
 

FP's are being used to rotate our bumper/secondary drive system and to drive the wheels on the secondary drive system.

Re: How did you use the FP motors?
 

To power the bottom two joints in our arm. The lowest is fp on DeWalt 15:1 driving a 20:1 worm driving a 19 to 92 tooth #35 chain 92 tooth drives the arm. Total ratio is 1452:1. Next is fp on DeWalt 15:1 to (20:1 worm has to be assembled at buckeye) then 30 to 135 in #25 arm walks around the sprocket. Total is 1300:1. Tried to use fp at 47:1 and 11 tooth to 135, (567:1) too aggressive and has issues with anti-back drive pins, may have let some smoke out of the motor, good thing we are coming with spares. At least there is less work to be done this year compared to last. We are limiting the fp's to 9 volts RMS in software. Last joint is jidico and globe directly linked on a 19 tooth driving a 135 in #25 chain. (987:1 if you start with the globe). Crossing our fingers and hoping our scale was off by at least 5 lbs.

Re: How did you use the FP motors?
 

We used two FP's to power our 5 foot arm to pick up tetras. We made a custom gearbox to give 270:1 reduction and then a 9 tooth sprocket to a 60 tooth sprocket to gives a total reduction of 1800:1. It works very well so far, even with limiting in programming to 9.6 Volts. We'll replace them with the 12 V motors at competition in a few days - and be very well set.

Here's a pic of them ...