Help with mach3 center finding script

[irving2008]

HI
THANKS JEFF
ANSWERING YOUR QUESTION
YES MY MACH 3 IS SETUP FOR METRIC
THIS IS THE BUTTON SCRIPT I NEED TO EDIT

Rem VBScript To center probe inside a pipe
If GetOemLed (825) <> 0 Then 'Check to see if the probe is already grounded or faulty
Code "(Probe plate is grounded, check connection and try again)"
Else
FeedCurrent = GetOemDRO(818) 'Get the current settings
XCurrent = GetDro(0)
YCurrent = GetDro(1)
Code "G4 P1" 'Pause 1 second to give time to position probe plate
Code "F4" 'slow feed rate to 4 ipm
Rem Probe left

XNew = Xcurrent - 3 'probe 3 inches to left
Code "G31 X" &XNew
While IsMoving() 'wait for the move to finish
Wend
XPos1 = GetVar(2000) 'get the probe touch location
Code "G0 X" &XCurrent 'rapid move back to start point
Rem Probe right

XNew = XCurrent + 3 'probe 3 inches to right
Code "G31 X" &XNew
While IsMoving()
Wend
XPos2 = GetVar(2000)
XCenter = (XPos1 + XPos2) / 2 'center is midway between XPos1 and XPos2
Code "G0 X" &XCenter 'rapid move to the x center location
Rem Probe up
YNew = YCurrent + 3
Code "G31 Y" &YNew
While IsMoving()
Wend
YPos1 = GetVar(2001)
Code "G0 Y" &YCurrent
Rem Probe down

YNew = YCurrent - 3
Code "G31 Y" &YNew
While IsMoving()
Wend
YPos2 = GetVar(2001)
YCenter = (YPos1 + YPos2) / 2
Rem move to the center

Code "G0 Y" &YCenter
While IsMoving ()
Wend
Code "F" &FeedCurrent 'restore starting feed rate
End If

OK, I'm no expert on Mach3 but I can write VBScript! This script appears to use an external probe and an external DRO - I'm assuming you have those and that they work and that you have elsewhere verified you can retrieve the DRO values . If thats not the case then this isnt going to work ever.

Assuming the above, the only lines that need to be changed are where it subtracts and adds 3 to the current values of X and Y, if Mach3 is set for metric I would assume these should be 75 (for 75mm), e.g.

XNew = Xcurrent - 3 'probe 3 inches to left

should be:

XNew = Xcurrent - 75 'probe 75mm to left

Similarly the 'F4' command for the feed rate should be 'F100' for 100mm/min