Best posts made by Jengland

I'm trying to set up an autocalibration routine for my CNC that runs on startup and was thinking it would be possible to drive a tool into an axes probe in a known location and save that as a tool offset then drive it into a second probe of a known distance to probe X and calculate the sterps/mm from that. does anyone believe this to be possible

@markz thanks that solved it

Has anyone been able to get a traditional tool length setter (one that sits at a known X Y position and sits above the bed) to work with programs that require semi-auto tool changes eg that use multiple tools? I've been struggling to set it up in a way that is consistent between changes.