I recently stumbled across Brett's tool length touch-off macro, and made some "enhancements", so I thought I'd pass it along to anyone who cares.

It appeared to me the original would not work correctly in all circumstances, as it did an explicit G90, but never checked to see if G91 was already in effect.  So, I fixed that so that it will work whether G90 or G91 was in effect, and restore the entry state.  I also changed the way the offset is determined, to simplify it logically.  In theory, the only changes someone should need to make is to change the PlateThickness RetractClearance and ProbeFeed variables defined at the top of the file.

Regards,
Ray L.

Thanks Ray, I'll have to check this out this weekend. The macro I posted did need a few tweaks.

Brett

Thanks Ray, I'll have to check this out this weekend. The macro I posted did need a few tweaks.

Brett

Brett,

   Great!  You can tell me if it works on an actual machine!  I've just simulated it!  :-)

Regards,
Ray L.

  Will do.

Brett

I just got off my lazy butt and made myself a VERY complex and sophisticated touch plate - a 1" x 2" piece of copper-clad FR-4, with a wire soldered to one side.  This, and the macro, work like a charm.  I touched off several times, and the machine position corresponding to the point of contact came out *exactly* the same, to the tenth, every time.  Very cool!

Regards,
Ray L.