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Unread 24-11-2014, 20:49
Dunngeon Dunngeon is offline
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Re: pic: CV Robotics WCD 6wd Drivebase Prototype

Quote:
Originally Posted by JorgeReyes View Post
I noticed how the 3 cims are really close to each other. How were you able to achieve this because I found that while its possible to get a small gap by using a smaller tooth gear, it wasn't possible to get such a small gap because you are limited by the bearing size (.375X.875 flanged bearing) which interferes with the placement of the cim motors.
There were 3 solutions

The first was use plate thicker than the Bearing, we went this way because we had 3/8 plate left over from last year and it was quicker than waiting for thinner stock to arrive

The second was to make cim-spacers, which would offset the CIM face. Then pocket out the required curve in the spacer to make the bearing fit. A little bit hacky, but I've tried it before. Another important note is it increases the overall length of the gearbox, pinching the bellypan even more

The third was to flip the bearing around, then use the overlap from the cims to hold the bearing in the hole (aside from the press fit).

We chose the first simply because we didn't want to waste time on the CNC. In the future, with a single reduction, I'd prefer 1/4in plate and method 3........ Depending on the game next year, I'd actually prefer a 2-speed over the single reduction.

In other news, I got the CNC plasma cutter dialed in and thus far I haven't seen any warp. I cut 5 of the diamonds into a test strip, running at ~45-50 amps and 130IPM. There wasn't any warp, but perhaps more interestingly, the cut edge was cool to the touch immediately after cutting. I'll be cutting the bellypan next Monday, and I'll document that more throughly.
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Last edited by Dunngeon : 24-11-2014 at 20:52.
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