Move to toolchange postion

Good day all

Have mill with air cylinder for toolchange.
Like to have Z axis move to home/limit switch when pushing a button, retract a little and activate air cylinder for as long as push button is activated. regards Wilfried

hi
first you can define this position in the ini
then Linuxcnc got 4 preprogrammed position on G-code
www.linuxcnc.org/docs/html/gcode/g-code.html#gcode:g30-g30.1

so there are many ways to do it

Sure, know about G30 etc.. but how do i get it to listen to a pushbutton?
example

net toolchange <= hm2_5i20.0.gpio.054.in_not => halui.jog.selected.plus ??????
how to select ???

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