Re: [CAD_CAM_EDM_DRO] Z axis conversion

Wally K wrote:

> I tend to agree with your "intrinsically crappy situation" statment.
> I keep going around in circles trying to figure out how to power the
> Z axis. All methodes seem to be bad. People that have seen the
> front quill methode of conversion tell me that the attachment screw
> to the quill always comes loose. I would not mind modifing my J head
> if i could come up with a good solution. And i still wonder if
> moving the knee is a good idea or not, in terms of wear. And or
> replacing the acme knee screw with a ball screw.

Mine has not come loose in 2 years of use. There is a tiny bit of
flex in the assembly, which translates into about .001" of backlash.
See my page at http://www.artsci.wustl.edu/~jmelson/CNCconv.html
the 8th picture is the quill mechanism. There were no modifications
to the J head at all required. I did remove a lot of parts related to the
auto feed stop, and used all those holes to attach the thing.

Jon