Quote:
Originally Posted by steelerborn
Although I haven't tried this on an FRC bot but one application could be for rotating a turret.
If you had a fairly long Face Width on the gears with a good ABS plastic you will probably be okay. If you wanted just a limited range on the turret you could just print out part of the large gear to drive the turret (90 degrees or something).
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This is a great application. 3824 prints ALOT. For Rebound Rumble they needed a large lazy Suzan for passing their ball thru a turret. They printed a large v-groove bearing (10" ID) that had a belt pulley integrated into the same part (e.g. Bearing and pulley were combined). It was secured by 3 mating bearings space 120 degrees apart.
As for gears and pulleys, they work great but I'd suggest using Andy Mark hubs if you are using the gears for power. You design your gear and have a hole in the center large enough for the hub. Use bolts to secure the hub to your pulley or gear then transmit power to a keyed shaft thru the hub. They've also used the same approach for couplings to window motors and fisher price gear boxes.
I'll try to dig up pictures. If you have a printer and you use belt drive, you should never have to order a belt hubs. Print out whatever pitch, diameter, width.. You need.