Hi

I am trying to get dual extruder working nicely with mach3. I made work offset so that when switching to another extruder it applys offset. Thats ok.

 Now I would need to the extruder to suck filament for about 6mm when switching extruder. But how? A and B "channels"  values are increasing all the time when printing.

So how I make for example A channel value 6mm smaller when changing to B and then add 6mm back to the value when changing back to A?