Calypso CNC User Forums

I use MSM pro with Mach3 in standard G45. and manual tool change with master tool. It works great!

But what I want to do is to define a constant X-Zero and Y-Zero point on my table. It will not be the default home because I need to allow for space to my touch plate. I have a fixed jig to always align all stock regardless their size to this specific point. This means my z-0 and y-0 will remain constant and I only needs to set my height. This will help me also to restart any work in case of power failure.

I recon I need to use G55 to define this offset. What I also want to know is then how to use this?

Hi,
When you set a zero point for a Work coordinate, the action is applied to whatever current work coordinate is active.
By default in mach that is G54.
If you want to set zero for G55, just select G55 (via a button in MSM or typing G55 in the MDI line) before setting the WC zero.

Then in your gcode make G55 active at the start of the program and you're all set.

Dave