Re: [CAD_CAM_EDM_DRO] Grizzly - Re: consider resurrecting a d ead CNC

pioneer_12mw wrote:

>One last gray area that I need to attack is the different treatment
>that seems to be given to the Z-Axis. I see that on my mill, the
>chuck is held upwards against the backlash via the drill retraction
>spring. Should this tension be increased to keep it from catching and
>being pulled down [into the work] or should it be removed to allow
>gravity to keep it down? Otherwise, am I missing something obvious
>about how the Z-Axis is handled?
>
>

You would do much better to move the whole head, and leave the quill locked
for CNC operation. The particular design of this machine (I think we
are talking
about the 850 Lb machine with either dovetail or rectangular column and the
"geared head" - is that right?) makes it VERY hard to do a quill drive
properly.

I think a servo might be a better way to go with that big head, though.

Jon