[glengeniii]

How can I assign a M number to this macro I found that is for the auto tool zero button. I would like to be able to use the button to zero the tool, and I would also like to assign a M-number so that immediately after a tool change, the the macro will be ran, the tool will be zeroed and the program then continue.

Example :
M28
T3 M06 G43 H3
M99991 (Auto zero's tool)
M1 (press cycle start to continue)
G0 z.375
......

Also, I would like to know if after the probe is triggered, does the z axis de-accelerate normally, or does it come to an abrupt stop (like when an e-stop is triggered). I'm afraid the I'll lose steps in absolute coordinates on the z axis with my stepper system.

Here is the macro I found:

Put a user DRO on the screen using Mach's screen utility, Screen4. Assigned it OEM code 1151

Also put a LED for Probe and one for Pause or Dwell. These I will explain later. See the screen grab below as pic.

Assigned the following macro to the "Auto Tool Zero" button.

PlateThickness = GetUserDRO(1151) 'Z-plate thickness DRO

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 P5" ' this delay gives me time to get from computer to hold probe in place
Code "G31Z-40 F500" '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 axact 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, PlateThickness) 'set the Z axis DRO to whatever is set as plate thickness
Code "G4 P0.25" 'Pause for Dro to update.
Code "G0 Z25.4" 'put the Z retract height you want here
Code "(Z axis is now zeroed)" 'puts this message in the status bar
Else
Code "(Z-Plate is grounded, check connection and try again)" 'this goes in the status bar if aplicable
Exit Sub
End If

[ger21]

Save the macro as Mxxx.m1s and pu it in Mach3\macros\yourprofile\

Not sure about the 2nd part, but you can set the feedrate low, so you shouldn't have a problem.

[carbideuk]

hi that seems so simple but it does nothing in my screenset I get not yet implemented message in my ststus bar. am I missing something?

[ger21]

If you created an M Code, you need to edit the screen in a screen designer so the button calls that M-Code.

Or, you use Operator > Edit Button Script, then click on the button, and add the code right to the button.

[carbideuk]

many thanks i have created the m code ok and it works fine I am still not sure how to apply it to a button in the screen set i was using the blue screen but the auto tool zero button seemed to be locked it was not available from operator/edit button/script. however i have gone back to my initial 1024 screen and now i was able to apply the script to the auto tool zero button.

Hurray!! many many thanks