Quote:
Originally Posted by Classified*
We will be driving plate sprockets using the bolt circle. They will be taking heavy load. We are going to be getting about 400 oz-in of torque out of the motor and we are supporting them on the opposite end with a 1/2" shaft so they are not cantilevered.
Thanks for the link! I think I will try it at practice tonight. We need the bolt circle but I can easily modify the cad for that. I am a little concerned about 3D printing them though. We have a mediocre 3d printer that is capable of making them, but they will be taking heavy load. Do you have more experience in this in order to know if 3d printing will be strong enough for high-load applications? (We have only used our 3D printer for parts once before I was on the team and I was told they broke)
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If you have an older 3d printer you are more than likely printing with PLA. We have done some heavy loading with PLA but you have to make them very think, print as a "solid" (which it really isn't) and have many replacements because they will break under match conditions.
In my opinion for a heavy load you are better off making your own axle out of some metal stock. Especially if you are considering hanging your robot from this motor. It is meant to hold up a car window roughly 20 lbs, depending on the car.
I think making a 1/4" axle with a 1/4" to 1/2" hex adapter would be a good solution. Also you will be better off putting a bearing on both sides of the axel.
Such as the 1/4" hex axle comes out of the motor. Then the hex adapter, support structure with a 1/2" hex bearing, rest of the 1/2" axle connected to whatever, then the other support and 1/2" hex bearing.
Hope this made sense,
Looking forward to some pictures of this mechanism.
Good luck with this, keep us informed.
Aloha!