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Originally Posted by HPA_Robotics_13
So how is team 1072 making sure that the motor doesn't stall? I suppose you have to have the torque from the arm when the arm is in the position you want, transferred to some other mechanism. With our arm design, and the way that team 833 has played FIRST in the past, I know that our arm will need to be up in the air many many times, for long periods of time.
So if you do a gear reduction from the motor to your arms pivot point this will reduce the strain on the motor at stall? is 7:1 enough? Also, if you put a heatsink on the motor along with a muffin fan, can you make up for the problem of heat enough that there shouldn't be a problem or are there other issues than the heat?
What is the reason that this is not an issue for the other motors provided?
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We're not using it for rotation, so our problem is much simpler. Since the new specs of the van door came out, we redesigned our elevator to be powered by 2 fisher prices. Basically we're using two of them at a reletivly low spool diameter to make SURE that it won't stall. I think our grabber would actually break before it stalls.
EDIT: I just remembered that one solution we came up with in our brainstorming (at one point were were thinking of doing a rotating arm), we were going to extend the bar past the pivot point and attach a cable to the back end, and a point equally far away from the pivot at the front of the arm. A cable would go down to a spool, wrap around it a bunch of times, and then go back up the other attachment point. That may pose entanglement issues though. Just a though.