Build in error checking and adjustment

My machines were assembled and adjusted according to the instructions on the manual. The accuracy and repeatability were good for most manual operations, but not CNC running, especially the backlash problem. Although sherline provides the anti-backlash nuts on all axes, if you want ‘zero’ backlash, you may need to adjust the nut after several runs.

Before dealing with the backlash problem, I decided to check and adjust the machines first.

The major equipments for me to perform checking are:

Mitutoyo No.513-401 dial test indicator
Earth-Chain magnetic base
China made 4”x2.5” square
Riken 6” precision level
SPI 3/8” edge and center finder

And the model of my lathe and mill are 4410 and 2010