I'm so frustrated, I thought I was finally getting on top of this before suddenly I cant get one toolpath strategy to work.
Basically I home the spindle, select the G55 offset load the g-code and regen the toolpath. Then when I start the g-code the spindle goes to the correct x,y coordinates but then travels often to z=0 or near to it but then tries to go z effectively positive which it obviously cant do. It does this for all the g-code files which I have used successfully before so it must be a setting in mach3.
Ive attached a file.
Please help.