Quote Originally Posted by russell View Post

Checked the alignment of the spindle to the column:
. found the spindle is parallel to thee column within 2 thou over 8 in. However the head is skewed giving 20 thou variation in 8 in when measured as above. I'll have to separate the two head castings and re-align.

Russell.
Hi Russell
Thanks for sharing your build, I'm enjoying following it!
Have you had a chance to address the misalignment yet? I have the same problem but am living with it at the moment. Any experience you can pass on will be gratefully received!
For powering the z axis I'm a bit embarrassed to admit that so far I've just bunged the motor on instead of the handwheel, there's at least 1.5mm of backlash through the rack and pinion, but the repeatability is pretty good, I just have the clearance plane in cambam set to 3mm.
Looking forward to the next installment!
Ian