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Originally Posted by JFettig
Yup, I got mine from homier.com
140 oz is not nearly enough, you need between 300 and 400 for best results.
The Z axis ballscrew is mounted to the top of the column and supported at the bottom, the ballnuts mount to the side of the head. The rack and pinion is completely gone.
Jon
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Too bad, I just bought 4 PowerMax II from eBay. I was planning to buy a Sherline mill and convert it to CNC. After doing some research, I found out the accessories for Grizzly mini mill are much cheaper than Sherline's.
Going back to the z axis mod. Can you tell me the model and the spec of the ball screw and ball nut that you use? A few close up pictures of the ball nut mount would be nice.
I found a website selling Grizzly mill CNC conversion plan for $50.
http://www.stirlingsteele.com/millplans.html
Thanks,
Tommy