Dan, are you the one that keeps emailing me about the probing?
If so, I reply the same day, and then get another email weeks later??
Edge probing works like this:
If you have a slow feed rate set, the probe should back away 1/4 the probe diameter, and then probe at the slower rate.
In the X+ direction, the back away move is this:
Code "G0 X" & XHit-ProbeD/4
You can change the ProbeD/4 to any numeric amount you want.
Code "G0 X" & XHit-0.5
will back up 0.5inches (or mm's).
If no slow probe feedrate is set, the probe will back up by the XY Clearance amount.
The second slow probe will back up to the position the probe was in when the operation started.
Here's the block of code where the above line occurs.
If FRate2=0 Then
Code "G0 X" & XHit-Clearance
While IsMoving()
Wend
Else
Code "G0 X" & XHit-ProbeD/4 While IsMoving()
Wend
End If
The manual lists the macros for each operation.
http://www.thecncwoodworker.com/downloads/mach3/2010%20Probing%20Manual.pdf