Team 4926 Swerve Drive CAD

[NowlingPro]

Originally Posted by Cothron Theiss

May want to move this thread to Robot Showcase or Technical Discussion. A lot of people aren't subscribed to the CAD forum, so not many people won't see this.

How would I do that?

Originally Posted by Chak

Looks good. Nice detail on the CAD. At first I thought it was too bulky, and then I realized I've been looking at asid61's swerves for too long and that this is fine.

A lot of the bulkiness comes from the shifter. I'm not sure about shifting speeds by crashing spinning gears into each other. I vaguely remember someone prototyping that awhile back. Did it go well?

The chain run from the shifter to the swerve module goes on shafts from 2 separate parts. Do you have the manufacturing tolerances to make sure that these 2 parts line up? If not, might as well add a tensioner.

On the swerve module, it looks like you're doing a lot screwing into the side of .25" sheet aluminum. You can make the bolt bigger and your life easier by cutting a cross into the side of things and slipping a regular nut in there (no tapping!) like this: http://www.instructables.com/id/How-...tted-Insert-N/
That link is good for other stuff too.

Do you plan on actually making this, or is it a practice thing?

I remember seeing an initial prototype that worked well, but not heavy lifting.

I was thinking of ways I could add a tensioner, but I could not find a simple solution. Any suggestions on tensioners? I have never designed with one in my 3 years of FRC experience.

I really like using the nuts like that! I will be doing a redesign and updating the model here soon!

This is intended to be one of two drive drivetrains that we use this coming season. Depending on the game, we will be going with a tank drive or this swerve drive.

Thanks for the feedback!

[Peyton Yeung]

Originally Posted by NowlingPro

This is intended to be one of two drive drivetrains that we use this coming season. Depending on the game, we will be going with a tank drive or this swerve drive.

Thanks for the feedback!

I'd highly suggest not selecting a drivetrain during the build season that you haven't physically prototyped in the offseason. This is my opinion for all drivetrains not just swerve. While CAD is great for getting the feel of a design, the build and software for a swerve drive can be taxing.