Re: [CAD_CAM_EDM_DRO] Re: Z axis conversion

dave engvall wrote:

> I strongly considered using a rod off the quill. That is....bolt a rod to the extension off the quill and use a bearing at the top
> of the rod to keep it running absolutely vertical. Drive a horizontal arm off of this with the ballscrew. This allows one to get the
> driving force as close as possible to the center of the quill; something I think will minimized the torqueing of the quill.

I tried to measure quill deflection off axis due to the quill drive by
the side bolt. I can't measure it with a .0001" test indicator. And,
I have a REALLY beat J-head that looks like somebody used the
quill as an anvil! (Due to chips wedged into the quill when retracting -
my J head was originally used as an auxilliary head on a gantry bed
contouring machine.)

Jon