Re: [CAD_CAM_EDM_DRO] Mounting Limit switches to a BP clone (knee mill)

We drilled near the table surfaces to mount a DRO on a mill and on the
cross slide to mount a new tooling setup. I think the bolt size was
10-24. The cast iron on these machines is much easier to tap than steel
would be.

Kim

On Wed, 2003-07-09 at 09:42, Peter R wrote:
> Hi gang,
>
> Has anyone drilled and tapped a hole into the table of a knee mill? I'm
> not sure if just the sliding surfaces are hardened or all over? By
> delicate scratching, it doesn't appear to be hardened.
>
> I've previously used unsealed microswitches (mounted to the cast iron)
> for my limit switches and while they have lasted well in most locations,
> one of the switch positions always catches drips of way oil and over
> time seems to go intermittant in its closure point - causing problems
> with zeroing the X axis. I've just ordered some sealed limit switches
> from Digikey but they are smaller and have a roller rather than the long
> lever of my existing switches. The best and cleanest mounting location
> will require me to drill a small hole in the side of the table just
> obove the sliding surface to mount an actuator arm. This new location
> will also give me an additional 3" of table travel in the X direction -
> which never goes astray! Has anyone drilled into the table? Having
> just broken a tap in stainless steel - I will figure another way if all
> the surfaces are hardened.
>
> Thanks & Cheers, Peter
>
>
>
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Kim Lux <lux@...>