pal wrote:Thank you. But if I clear and save 0 work offsets, current coords / machine coords still have a positive value. When the machine cords button is red, the zero all button doesn’t zero X axis, neither does the the individual blue zero button. I can’t manually enter 0.000 for X, when I press enter it reverts back to the g54 offset. Seems I’m just chasing myself round and round.
You can't zero the Machine Coordinates with the zero button(s).
To Zero Machine Coordinates, you need to home the axis. That's the only way to zero them.
Machine coordinates is the G53 coordinate system. Setting the G54 offsets to zero has no effect on Machine Coordinates.
In regards to Machine/Work Coordinates, UCCNC is EXACTLY the same as Mach3. Not sure how you could use Mach3 for over 10 years, and not understand this.
Try watching the Homing, Limits and Offsets video here. Maybe it will help you to understand the process. As I said, UCCNC offsets and Machine Coordinates work EXACTLY as they do in Mach3.https://www.machsupport.com/videos/