The following work of accuracy adjusting is most important. Most of this part need work with the dialgage and stone ruler used former. I connected a stepper motor controller I DIYed before and make the adjusting quicker. I took only one picture during the adjusting. other steps were pretty similiar.



Now I show the last accuracy testing report:

(all error within full travel distance)

X travel plate error: 0.02mm
Y travel plate error: 0.01mm
X-Y perpendicularity: 0.01mm
Z-X perpendicularity: 0.01mm
Z-Y Perpendicularity: 0.01mm

Totally I'm very satisfied with the error result. I can test the spindle to worktable perpendicularity now. so have to wait the spindle unit.

I'm sure if the grinding works of the worktable could be better, the X travel error should be within 0.01mm also. I could also do some manual fixing work with oilstone also to make it <0.01mm,,, but it will take some long time. so I just leave it as it is now.

Nex I will just dissamble the machine and paint the main structure. And then assemble it again. I will measure the errors again when assembling again to make sure of same--or even better---just if I'd like to cost more time on it