[Mr.Chips]

DIY 13 year old CNC, Mach3, Gecko 540, ESS Smoothstepper, C25S BOB. The last month or so was running out of paper to set the Z zero height (LOL) and decided to find some mach3 Z auto zero code.
Here is the Z axis code that I found after installing it worked as expected, but the next time after hitting AUTO TOOL ZERO it woukd pause doe aproximately 5 seconds and raise about 1/4" and the Z display woud change to +1.000.

This is a single touch code, I would prefer a double touch, but at this point ill settle for a single touch.
Any Suggestions.
Thanks
Hager

CurrentFeed = GetOemDRO(818) 'Get the current feedrate to return to later
CurrentAbsInc = GetOemLED(48) 'Get the current G90/G91 state
CurrentGmode = GetOemDRO(819) 'Get the current G0/G1 state

If GetOemLed (825)=0 Then 'Check to see if the probe is already grounded or faulty
DoOEMButton (1010) 'zero the Z axis so the probe move will start from here
Code "G4 P3" ' this delay gives me time to get from computer to hold probe in place
Code "G90 G31Z-4. F4" 'probing move, can set the feed rate here as well as how far to move
While IsMoving() 'wait while it happens
Wend
ZProbePos = GetVar(2002) 'get the exact point the probe was hit
Code "G0 Z" &ZProbePos 'go back to that point, always a very small amount of overrun
While IsMoving ()
Wend
Call SetDro (2, .756) ' change .060 to your plate thickness and then adjust for final accuracy
Sleep 200 'Pause for Dro to update.
Code "G1 Z1. F50" 'put the Z retract height you want here, must be greater than the touch plate thickness
While IsMoving ()
Wend
Code "(Z axis is now zeroed)" 'puts this message in the status bar
Code "F" &CurrentFeed 'Returns to prior feed rate
Else
Code "(Z-Plate is grounded, check connection and try again)" 'this goes in the status bar if applicable
End If
If CurrentAbsInc = 0 Then 'if G91 was in effect before then return to it
Code "G91"
End If
If CurrentGMode = 0 Then 'if G0 was in effect before then return to it
Code "G0"
End If

[MrMetric]

I'm thinking that you may have intended to post this in a different forum. The one you have selected here is for Dyna Mechtronics machines. Most of these machines, except for the smaller ones, are probably still using the original controls, not Mach. The code you are running looks like it is probably some Mach specific macro language, which most of us here will probably not natively know.

I am sure there is a Mach forum here on cnczone that can probably net you more/better answers to your question than you'll get here.... Best of luck in your search and I hope you solve your problem.