Re: [CAD_CAM_EDM_DRO] Re: Spindle alternative from noise view

Peter Reilley wrote:

> Jon;
>
> I always wondered about this mounting scheme. Is the quill
> guide tight enough to prevent any rotation of the quill. The only
> thing preventing the quill from rotating is the quill scale and
> automatic trip mechanism mounted on the front of the head.
> There is no adjustment for wear. Even .001' of slop would give
> about .003' Y axis movement. Is that good enough?
>
>

Ah, well, my machine is not a stock Bridgeport, far from it. I have a
ball screw attached
where the usual stop ring went, and so it likely acts as a pretty stiff
guide preventing rotation of the
quill. A good point, though, on a stock Bridgeport head the quill may
not be tightly restrained
from rotation.

I know that this works well, as I have done some circuit board drilling
with .018" carbide
drills, and even .001" shift would have broken those for sure.

Jon