[davek0974]

Im trying to get g28.1 working on my plasma table build, it's all getting there except for the dro's, here's the code...

G28.1 z3.00 f250 - probe the surface
G92 z0 - set DRO zero
G00 z4 - move to switch offset
G92 z0 - set DRO zero
G00 z1 - move to pierce height

This works perfectly if entered by hand into mach3 one line at a time, however, if run programmatically from g-code it leaves the z axis DRO at some odd reading like 8.4499

Is there a way to fix this?

Thanks

[davek0974]

Anyone?

[rbjem]

Maybe try putting some dwells (G4 P100) inbetween lines.

Sent from my SPH-L720 using Tapatalk 2

[davek0974]

Maybe try putting some dwells (G4 P100) inbetween lines.

Sent from my SPH-L720 using Tapatalk 2

I tried that but apart from slowing it down, did not work.

I have just found this in a thread

While IsMoving()
Wend

After each DRO reset, I will tomorrow when I'm back at work.

Dave

[ger21]

You can't use While...IsMoving in the g-code.

You'd need to create an M code macro containing your code, and use it there.

Then, in your g-code, you'd have:

G28.1 z3.00 f250 - probe the surface
Mxxx

The M Code would be something like:

Code "G92 z0"
While IsMoving()
Wend

Code "G00 z4"
While IsMoving()
Wend

Code "G92 z0"
While IsMoving()
Wend

Code "G00 z1"
While IsMoving()
Wend

[davek0974]

Ok, interesting, I will try that

Where you have "code". I take it that you actually type "code.." In the macro as it is shown?

[ger21]

Exactly as it's shown. Save as Mxxx.m1s, in the \Mach3\macros\yourprofilename\ folder

[davek0974]

Brilliant, don't suppose you know how to call a macro from within a sheetcam post?

[davek0974]

All fixed, on the mach3 config page there is a tick box "g28.1 at end of program" this was ticked, don't know what it's for but it upsets the z DRO at the end of a run, clearing it solved the issue.