pic: WCD

[DampRobot]

Originally Posted by Joey Milia

Just one thing on the DT, I can't see but I just want to make sure you have the bearing blocks really well connected inside the tube. On a prototype last year we just had 3/8 plate on each side with spacers and they would wouldn't always be lined up correctly.

I'm interested to hear this. What was the root of the problem (ie, if stresses caused undesirable misalignment, what was the cause), and what undesirable effect did this cause? Also, could you describe your setup? What changes did you make in your 2012 drive?

I ask because we're contemplating doing something very similar for our 2013 drive. Here's a screenshot of the setup we're thinking of: http://puu.sh/1H1fU. We would have 2 3/8" plates on either side of the tubing, pocketed so they fit over 2x1 tubing. They would be kept parallel by the 4 10-32 button heads running between the plates, the shaft itself, and the tensioning screw in each plate.