Quote:
Originally Posted by ctt956
I have decided to go with two CIM motors, as I'm familiar with them and they have gearboxes, controllers, etc. easily available. The duty cycle isn't much of an issue, as they won't be running long or working as hard as they do sometimes in FRC. I think I'm going to go with BaneBots 220 gearboxes, or maybe Toughbox Micros. The BaneBots seem more durable, but the Toughbox has higher torque(I think? 12.75:1 vs. 4:1). I know I would probably need bearings and mounting brackets, but would I need any additional hardware to mount the AndyMark 8" Pneumatic Wheels to either of those gearboxes? The link for the hubs doesn't work. The wheels' load capacity is listed at 120 lbs., but that's for one, I'm assuming. So two would have a capacity of 240 lbs. I know robots weigh more than that with a battery and bumpers... |
The AM pneumatic wheels have a 1" through-hole and a 1.875" 6-bolt circle; hubs will be required to mate these to any gearbox with an output shaft. For the TB micro, this will be a 1/2" hex shaft, for TB mini it will be 1/2" hex or 1/2" round keyed shaft depending on what you order, for BaneBots 220 it will be a 1/2" round keyed shaft. The hub from AM is
http://www.andymark.com/Hub-p/am-0096a.htm or
http://www.andymark.com/500ex-1-2-in...-p/am-2568.htm for hex;
http://www.andymark.com/Hub-p/am-0077a.htm for round keyed. I added the TB mini into the mix because it is only a couple of dollars more than the TB micro, and can be upgraded to a second CIM very easily; unless you are really sure that you're going to have enough capability with one CIM per gearbox, it makes sense to hedge the bet and get the 2-motor capable boxes. Also note that the Banebots gearboxes can be stacked, so you can have gear ratios of 4:1, 16:1, or 64:1, though each reduction comes at an increase in weight and cost.