adjust z while milling

hi, as it is not very easy to adjust the height z to mill a printed circuit I would like to be able to adjust + or - 0.1 mm while working, in steps of 0.01 mm maybe with a manual encoder.
the system is closed loop with servo dc, just an idea to understand if you can.
thank you
Mauro

Look at the offset component. You hook it between motion and your pid (or however you have your system setup)

linuxcnc.org/docs/html/man/man9/offset.9.html

then you can send it offset amounts that motion doesn't know about. You probably want to put a limit3 before it.

sam

thank you ! it seems just what I need

I looked to see some examples but all refer to moveoff ..
this is the Z section of my hal, I wrote next to the signals to intercept in my opinion.
can you take a look?
thank you
Mauro

thanks Sam and Andy, I did with offset, very simple to use just as I meant
with a 24 cpr mechanical bourns encoder I can change z 0.001 mm in pitch.
if someone interested in the file there are the changes I made.
regards
Mauro

andypugh wrote:

Probekins was written for this. I don't know if ir ever properly worked.

wiki.linuxcnc.org/cgi-bin/wiki.pl?ProbeKins

Something like that and the External Offsets branch would work.

Just for the record, I use probekins on my router sometimes, and it works great as long as you know and follow the limitations.

forum.linuxcnc.org/10-advanced-configura...sing-probe2stl#30130