pic: 3 CIM WCD Ball Shifter CAD

[nathannfm]

Originally Posted by Bryce2471

I think the WCP gearbox only has one web that goes vertically to the bottom of the CIM. That is what this configuration has as well. Here is a close up of the CIM mount:
https://scontent-a.xx.fbcdn.net/hpho...e9&oe=54D168FA

Ah, this clears it up, most of that webbing was not visible in the original render and that makes me much happier about the support of the CIM.

Originally Posted by Jared

The biggest change you should make is using the 0.75" boss on the front of the CIM to help locate the CIM. It'll increase the positional accuracy of the CIM by quite a bit, and it'll make the part even stronger.

This sounds like a good idea but I would caution that you should know the tolerances of that boss and the tolerances of the equipment used to cut the hole in the plate. We made our first waterjet part ever a few weeks ago with a 0.750" hole for the boss and suprise suprise it comes back and the CIM won't fit.

Originally Posted by Bryce2471

Here's a pic of it:
https://fbcdn-sphotos-f-a.akamaihd.n...d4841aad532276

Would this be all steel? I know the ball capture area is steel on the VexPro model presumably for wear reasons. Also, I know it would be pretty difficult to machine but I would recommend a fillet at the hex to round transition as that looks like its a pretty big stress riser.
Related to this component, if you make the hex shaft attach to the ball shifter with a pin or through bolt instead of making it one part it would make removal of the gearbox pretty simple. Just pull the pin, retract the shaft toward the outside of the robot and pull the gearbox either out the top or bottom.

Originally Posted by Chris is me

For those reading who want to learn, more on pocketing in this great video: https://www.youtube.com/watch?v=wGmsnD0KQMs

Also, just to comment on that video I prefer the "sketch fillet" tool to the 3D fillet tool as it crashes much less, trims your lines for you, and contains all your pocketing features in one "Cut-Extrude". Also, if it crashes you are already in sketch mode to fix it.