Re: [CAD_CAM_EDM_DRO] Re: Limit Switches ???

At 05:28 AM 5/31/02 +0100, you wrote:

>
>That sounds funky. My lathe has only just stopped 'electrically sensing' me
>with 220v. I found out someone had undone the earth on the plug for some
>reason. How hard would it be to make such a probe anyway?

Pretty easy. I digitize with electrical contact method. I insulate the
mount of a dial indicator from machine, connect to aux input. The tip of
the indicator is the probing point. The indicator mechanism serves as
over-run protection. Software polls the aux input and makes appropriate
moves depending on open/closed status, hence finding the exact point of
contact. Dial needle doesn't even flicker when it touches down. Software
also writes to file commands corresponding to the required moves to
duplicate the part later. Then the indicator is replaced with tool having
same tip config. Voila. I can also record the coords of the points if all I
want is a record of the profile.

Regards, Hoyt


Anti-virus request: Please do not add this email addy to address books
Belfab CNC - http://www.freeyellow.com/members/belfab/belfab.html
US Best MC - http://www.freeyellow.com/members/batwings/best.html
Camping/Caving - http://www.freeyellow.com/members/batwings/caving.html
Where's Curtis LeMay when we really need him??