late van door question

[JKsenior05]

ok well first thanks for the feed back

second in response to the first reply

"You cannot drill, cut, or otherwise modify the casing of the motor. Not only is it against the rules, it is a safety hazard and a good way to destroy the motor." - Cory

5.3.4.1 Kit of Parts Rules
<R31> So that every robot’s maximum power level is the same, the motors in the kit may not be modified except
as follows:
•It is acceptable to modify the mounting brackets and/or other structural parts of the motors (output
shaft, housing, etc.) as long as the electrical system is not modified and the integral mechanical
system of the moving parts (bearings, bushings, worm gear output stages, etc.) is not changed or
removed.


I maybe wrong iam not sure on how its defined but those words allow for the possibilty possibilty of making ventalation holes in the housing/casing of the van door motor to vent hot air and yes you are right about it possibly posing a safety hazard so i was just wondering if it was a practical solution and if the housing/casing cant be removed or is filled with oil its out of the question but i dont know about those facts and the team doesnt want to risk damageing the motor without confidence that it will/should work

third reply number two

cdawzrd

We are using the motor to drive a bike chain and pair of gears. We built a fixed posting tower in the front and then attached the pivot point of the arm to the top.
The smaller of the two gears was placed at the bottem and the large at the top. I believe the math with accounting for arm length and tetra weight it came out to be gearing to something like a 1 to 3 or 1 to 4 ratio. Anway we have enough speed and torque to raise a tetra and hold it in place fairly quickly. But as metioned before the motor becomes rather warm and then slows down before stopping for several seconds. Thermal protection we believe. We came up with several ideas to fix it, adding a small counterweight ( but we have move part of the frame to make it work), adding a second motor to give it a boost ( however very time consuming), and of course finding a way to cool the motor so that the thermal protection dosnt kick in so soon. Then let the motor finish cooling off in between matches. Any thoughts? much apprecaited