Backlash, Version 2.0 Design Concept

So I have backlash! I did not know how to measure it until I posted over on the CNCZonne. It was suggested that I cut a pattern in an attempt to figure out my backlash problems.

Backlash measurement pattern.

So I cut out he piece and measured it. It turns out that I have zero backlash in the Y direction, however I have 0.0155in of backlash in the X direction. I then examined my machine and found the cause to be my lead screw nut. It seems to have significant play. I will have to make another nut and see if that eliminates my problems.

backlash test piece, two 1" squares joined together.

I also have been working on a proof of concept for my next machines linear bearings. As I said int he previous post, I recently bought 3/8" V groove bearings. I used my CNC machine to cut out two end pieces out have a cutting board to hold 3/4" aluminum square tubing. It seems that this concept will work well! The two aluminum rails are extremely parrellel, only varying from one end to the other by a few thousandths of an in! If I correct that backlash problem I have, it could be even better!

This new machine is going to be awesome!