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Unread 15-09-2014, 00:49
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FRC #1197 (Torbots)
Team Role: Engineer
 
Join Date: Jan 2005
Rookie Year: 2003
Location: SoCal
Posts: 19,725
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Re: Gearing Mini CIMs

Quote:
Originally Posted by DarkRune View Post
My team's running a small scale build season in the off season, and we're going to be using mini CIMS for the pickup. The necessary ration is 20:1, but I haven't really dealt with gears before.
Quote:
Originally Posted by TylerS View Post
A mini-cim is overkill for picking up and I am saying that from a team who used one for our pickup.
That last depends on what is being picked up... That said, 310 RPM and 20ft/lb (the reduction result) is a stronger pickup than most, I'd say (and likely slower--a fast intake with a good grip and sufficient torque is better than a slow but way-too-powerful intake). Try the BAG motor (700 RPM and 5 ft/lb, as reduced) or a BaneBots motor, or use a lesser reduction. For an intake, I'd generally go BaneBots with a BB gearbox as having a smaller footprint and lower weight, and it's not terribly hard to get the right gear ratio for the pickup off of that gearbox if the gearbox isn't exact.
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Past teams:
2003-2007: FRC0330 BeachBots
2008: FRC1135 Shmoebotics
2012: FRC4046 Schroedinger's Dragons

"Rockets are tricky..."--Elon Musk