WHAT manual  

(;-) TP

Well, there seem to be several manuals

So.....

Hang on a minute, you may have something...

Does mach only allow the signals through when the button is on AND code is running I.e.making a cut??

I had put the THC into test mode which sends out a continuous arc ok signal plus alternating up / down signals.

I presumed this would then activate the z axis when the THC on button is pressed regardless of a cut being made.

If so then this sort of stuff really should be in the manual.

What about the DRO not setting correctly after G28.1?

What about the DRO not setting correctly after G28.1?

Anyone

It has been mentioned to add

While ismoving()
Wend

After each call to set DRO to zero, but how can that be added if the calls come for the sheetcam post, adding a g4 delay does not work, same result.

Post the file that you are running where it does not set the dro  correctly.

I have NEVER seen that here. In a running cut file  yes , due to lost steps. But a single G28.1 routine? I have never seen it do that. 

The while ismoving() has nothing to do with the Gcode side of Mach3. It is a CB function.

(;-) TP

I was using this to test the g28.1 method of probing...

G28.1 Z3.00 F250 (probe surface)
G92 Z0 (reset DRO)
G00 Z4.00 (move up by limit switch offset)
G92 Z0 (set zero)
G00 Z5.00 (move to some arbitrary point to measure the torch gap with a 5mm spacer)

Seems nice and simple, if i type it in by hand in the manual screen on Mach, it all works perfectly. leaves the Z DRO at 5.0000mm

But if i run it from a .tap file containing just that code (plus M30 at the end) it works but leaves the Z DRO reading a meaningless 11.4799mm every time???

Can this be fixed???

I have tried putting a delay after the DRO reset lines but no change.

Do you have a Safe Z setting in play ? If so that last move it may make is to go to the Safe Z position.

I will test your code but do NOT see a problem with it.

Be right back, (;-) TP

Not that I know of, at least I have not set any afik.

I do not see any problem with your G28.1 code here It moves to Z5.00 just as the Gcode commands.

(;-) TP