Center to Center with belts

[Mk.32]

Originally Posted by craigboez

Very nice arrangement, we're working on something similar for an offseason project. Two questions:

1. Do you mean you milled the GT2 pulleys? If so, can you provide some details on what is required to do such a thing. Are there specific CAD tools, special cutting tools, etc that make life easier?
2. It sounds like you didn't have any issues with belts skipping/ratcheting, even though 15mm belt sounds like a "safer choice" for a drivetrain. Using the 9mm did you drive it hard, go from full forward to full reverse, push much, etc without issues?

Thanks Really happy with this drive.

What I meant in my post was I CNC milled the bearing holes in the rails so that the C-C distance was a really tight tolerance. (I would think 1/32 off would be to much).

However I did machine my own pulleys, more info: http://www.chiefdelphi.com/media/photos/38380
In short just a tiny (3/32th) square endmill + 3/8 alum plate + cnc. The pulley cad was downloaded from SDPSI and I used just my regular CAM software to come up with the tool path.

We did not have any issues with skipping and ratcheting. And the people that have seen me drive can vouch we pushed the drive as hard as we could, with doing all the above. Also to test I pretty much rammed into a test wall and stalled the motors and the belts still didn't ratchet.