'*************************************************************************************************************
'************************************     FIND X/Y CENTER (EXTERNAL)    **************************************
'************************************      A TOUCH SCRIPT FOR MACH3     **************************************
'******FONT**************************     FOR BOTH INCH AND MM UNITS    **************************************
'*********Courier********************  CHARLIE SARSFIELD REV14 JUN/2018 **************************************
'************************************    WWW.YOUTUBE.COM/SUNNY5RISING   **************************************
'************************************        SUNNY5RISE@GMAIL.COM       **************************************
'*************************************************************************************************************
'***************** NOTES BEFORE LAUNCHING:				                      ****************
'*****************   Z ZERO MUST ALREADY BE SET TO TOP OF PART OR ABOVE PATH OBSTACLES.       ****************
'*****************   PROBE MUST BE PLACED AT NEGATIVE SIDE OF AXIS AT USER PREFERRED Z HEIGHT.****************
'*****************   APPROXIMATE SPAN INPUT SHOULD BE SET AT PART SIZE OR SLIGHTLY LARGER.    ****************
'*****************   TO USE DEFAULT PROBE & GAGE VALUES, SET RELEVANT DRO(S) TO ZERO.         ****************
'*****************   TO USE A GAGE VALUE OF ZERO, ENTER A NEGATIVE VALUE IN THICKNESS DRO.    ****************
'*************************************************************************************************************
'----- USER VARIABLES ----------------------------------------------------------------------------------------
If GetParam("Units") = 0 Then
 'METRIC VALUES
 VarUnits = "  MM"
 VarMaxDistance = 25.4		'MAX TRAVEL BEFORE ALARM 
 VarFeedRate = 127		'MM/MIN FEEDRATE FOR APPROACH
 VarStandOff = 1.27		'STANDOFF DISTANCE * RECOMMENDED SETTING 1.27
 VarProbeDia = 3.175		'DEFAULT PROBE DIAMETER | EDGE FINDER DIA. DRO PRECEDENCE
 VarGageThick = 0		'DEFAULT GAGE THICKNESS | GAGE THICKNESS DRO PRECEDENCE
 VarApproxSpan = 0		'DEFAULT APPROXIMATE PART SPAN * OPTIONAL
 VarSafetyGap = 6.35		'DEFAULT SAFETY GAP (EXTRA SPAN BEYOND APPROXIMATE SPAN) MIN RCMD:3.05
Else
 'SAE VALUES
 VarUnits = " INCH"
 VarMaxDistance = 1.0		'MAX TRAVEL BEFORE ALARM
 VarFeedRate = 5		'INCH/MIN FEEDRATE FOR APPROACH 
 VarStandOff = 0.05		'STANDOFF DISTANCE * RECOMMENDED SETTING 0.05
 VarProbeDia = 0.125		'DEFAULT PROBE DIAMETER | EDGE FINDER DIA. DRO PRECEDENCE
 VarGageThick = 0		'DEFAULT GAGE THICKNESS | GAGE THICKNESS DRO PRECEDENCE
 VarApproxSpan = 0		'DEFAULT APPROXIMATE PART SPAN * OPTIONAL 
 VarSafetyGap = 0.250		'DEFAULT SAFETY GAP (EXTRA SPAN BEYOND APPROXIMATE SPAN) MIN RCMD:0.120
End If

VarRateOrRapid = 1		'DEFAULT POSITIONING MOVEMENT: 0=SAFETY RATE (FEEDRATE * 2)  1=RAPID
VarWhichAxis = 0		'DEFAULT AXIS CHOICE: 0=X  1=Y
VarSpanHold = 3			'DEFAULT SECONDS TO PAUSE MOVEMENT UPON REACHING SPAN LOCATION

VarDelayInSec = 0		'DEFAULT SECONDS TO DELAY MOTION AFTER BUTTON CLICK
VarBeepOrSpeak = 2		'COUNTDOWN AUDIO: 0=NONE 1=BEEP 2=SPEAK 
VarSecOfAudio = 5		'COUNTDOWN SECOND AT WHICH AUDIO BEGINS

VarCompleteAudio = 3		'END SIGNAL: 0=NONE 1=Beep 2=SPEAK 3=WAV_AUDIO_FILE
VarWavAudioFile = "C:\MACH3\ToolCompleteSND1.wav" 'AUDIO FILE & PATH

'*************************************************************************************************************
'*************************************************************************************************************

'----- GET INITIAL ENVIRONMENT SETTINGS FOR LATER REINSTATEMENT ----------------------------------------------
VarInitialLinearMode = GetOemDRO(819)        'LINEAR MODE  G00/G01
VarInitialDistMode = GetOemLED(48)           'DISTANCE MODE G90/G91    
VarInitialFeedRate = GetOemDRO(818)          'FEEDRATE
VarInitialInhibit = GetParam("ZInhibitOn")   'Z INHIBIT STATUS  OFF/ON
VarInitialXScale = GetParam("XScale")	     'X SCALE VALUE
VarInitialYScale = GetParam("YScale")	     'Y SCALE VALUE
VarInitialZScale = GetParam("ZScale")	     'Z SCALE VALUE
VarInitialFRO = GetOemDRO(821)		     'FEEDRATE OVERRIDE PERCENTAGE
Message ""			             'CLEAR STATUS LINE TEXT

'----- CHECK DIGITIZE STATE; 0=CLEAR 1=ACTIVE ----------------------------------------------------------------
If GetOemLED (825) <> 0 Then 
 MachMsg("Digitize Status Not Clear. Check Probe/Connections And Try Again!","*** ERROR! ***",0)
 End		'END SCRIPT
End If

'----- RETRIEVE PROBE DIAMETER AND GAGE THICKNESS ------------------------------------------------------------
If VarProbeDia = 0 And GetOEMDRO(1000) = 0 Then
 MachMsg("Coffee First, Then Provide Probe Diameter And Try Again.","*** ERROR! ***",0)
 Message "Find Center CANCELED"   'DISPLAY MESSAGE
 End				  'END SCRIPT
Else
 If GetOEMDRO(1000) <> 0 Then VarProbeDia = Abs(GetOEMDRO(1000))   'CHECK AND GET FINDER DIA DRO VALUE IF USED
End If

If GetOEMDRO(1001) <> 0 Then		   'CHECK FOR GAGE THICKNESS VALUE
 Select Case InStr(1,GetOEMDRO(1001),"-")  'CHECK IF NEGATIVE IS USED
  Case 0				   'NEG NOT PRESENT
    VarGageThick = Abs(GetOEMDRO(1001))	   'SET GAGE THICKNESS TO DRO VALUE
  Case 1				   'NEG IS PRESENT
    VarGageThick = 0			   'SET GAGE THICKNESS TO ZERO
 End Select         
End If
Select Case GetParam("Units")		   'SET UNITS FOR STATUS LINE DISPLAY
 Case 0					   'MM
  VarMsgUnits = "mm"
 Case 1				   	   'INCH
  VarMsgUnits = "in"
End Select
'FORMAT STATUS LINE TEXT
VarStatusMsg = "Probe: " &VarProbeDia &VarMsgUnits &"   Gage: " &VarGageThick &VarMsgUnits

'----- RUN DIALOG SUBROUTINE ---------------------------------------------------------------------------------
RunTheThing

'----- ACTIVATE TIME DELAY IF USED ---------------------------------------------------------------------------
If VarDelayInSec <> 0 Then COUNTDOWN

'----- CANCEL SCALE, FEEDRATE OVERRIDE, Z INHIBIT, AND CALC VARIABLES ----------------------------------------
SetParam("XScale",1.0)			     'SET X SCALE TO 1.0
SetParam("YScale",1.0)			     'SET Y SCALE TO 1.0
SetParam("ZScale",1.0)			     'SET Z SCALE TO 1.0
SetParam("ZInhibitOn",0)        	     'TURN Z INHIBIT OFF
DoOemButton(1014)			     'CANCEL FEED OVERRIDE
VarInitialZ = GetOemDRO(802)		     'GET STARTING Z LOCATION
Var2ndDist = VarMaxDistance + VarSafetyGap   'CALCULATE 2ND PROBE MAX DISTANCE
VarSafetyRate = "F" &VarFeedRate * 2	     'SETUP SAFETY POSITIONING FEEDRATE
If VarRateOrRapid = 0 Then VarLinearMode = "G1" Else VarLinearMode = "G0"   'SETUP LINEAR MODE

'----- RUN CHOSEN AXIS SUBROUTINE 0=X  1=Y -------------------------------------------------------------------
If VarWhichAxis = 0 Then RunXCenter Else RunYCenter

'----- REINSTATE ----- RUN END AUDIO ----- DISPLAY SPAN ------------------------------------------------------
RETURNSTATE                     'CALL REINSTATE SUBROUTINE
Select Case VarCompleteAudio	'PLAY SELECTED END AUDIO
 Case 1				'OPTION BEEP
   Beep
 Case 2				'OPTION SPEAK
   Speak("Tool Zero Complete.")
 Case 3				'OPTION WAV_AUDIO_FILE
   PlayWave(VarWavAudioFile)
End Select
Sleep 500			'DELAY 1/2 SEC
Select Case VarWhichAxis	'DISPLAY SPECS FOR RELEVANT AXIS/AXES 
 Case 0 'X
  Message VarStatusMsg &"     X Span:" &VarSpanX    'STATUS MSG X
 Case 1	'Y
  Message VarStatusMsg &"     Y Span:" &VarSpanY    'STATUS MSG Y
End Select
End	  'SCRIPT RUN COMPLETE

'******************************************* SUBROUTINES BELOW ***********************************************

'----- SUBROUTINE FOR COUNTDOWN DELAY ------------------------------------------------------------------------
Sub COUNTDOWN
 VarDelayInSec = Abs(VarDelayInSec)
 Do Until VarDelayInSec = 0		'LOOP UNTIL SECONDS = ZERO 
   Message VarStatusMsg &"     Delay: " &VarDelayInSec 'DISPLAY SECONDS VALUE IN STATUS LINE
   If VarDelayInSec < VarSecOfAudio + 1 Then
     Select Case VarBeepOrSpeak	
      Case 1 'OPTION BEEP
       Beep
      Case 2 'OPTION SPEAK 
       Speak(VarDelayInSec)	
     End Select
   End If
  Sleep 1000 	  'PAUSE 1 SEC.
  VarDelayInSec = VarDelayInSec - 1	'REDUCE SECONDS BY 1 AFTER EACH LOOP
 Loop
End Sub

'----- SUBROUTINE TO RETURN INITIAL SETTINGS -----------------------------------------------------------------
Sub RETURNSTATE
 'REINSTATE INITIAL FEEDRATE
 Code "F" &VarInitialFeedRate        
 
 'REINSTATE DISTANCE MODE  0=G91  -1=G90
 If VarInitialDistMode = 0 Then Code "G91" Else Code "G90"
 
 'REINSTATE LINEAR MODE  0=G00  1=G01
 If VarInitialLinearMode = 0 Then Code "G00" Else Code "G01"

 'REINSTATE Z INHIBIT STATUS 0=OFF 1=ON
 If VarInitialInhibit = 1 Then SetParam("ZInhibitOn",1)

 'SET X SCALE TO INITIAL VALUE
 If VarInitialXScale <> 1.0 Then SetParam("XScale",VarInitialXScale)

 'SET Y SCALE TO INITIAL VALUE
 If VarInitialYScale <> 1.0 Then SetParam("YScale",VarInitialYScale)

 'SET Z SCALE TO INITIAL VALUE
 If VarInitialZScale <> 1.0 Then SetParam("ZScale",VarInitialZScale)

 'SET FEEDRATE OVERRIDE TO INITIAL VALUE
 If VarInitialFRO <> 100 Then SetOemDRO(821,VarInitialFRO)
End Sub 

'----- DIALOG SUBROUTINE FOR SPAN LENGTH, AXIS CHOICE, AND TIME DELAY ----------------------------------------
Sub RunTheThing
 Dim ApproxText$ (0)		  'DECLARE 1 ITEM ARRAY FOR APPROXIMATE SPAN
  ApproxText (0) = VarApproxSpan  'FILL ARRAY 1

 Dim UnitList$ (0)		  'DECLARE 1 ITEM ARRAY FOR UNIT LISTBOX
  UnitList (0) = VarUnits	  'FILL ARRAY 1

 'SETUP DIALOG CONTROLS	
 Begin Dialog AxisSpanChoice 110,130,"Find Center (External)", .EnableIt
  Text 25,1,100,30, "*** WARNING ***" 
  Text 7,11,115,15, "Z0 Must Be Above Obstacles!"
  TextBox 15,32,35,10, ApproxText$(),.ApproxTxt
  ListBox 64,32,25,10, UnitList$(),.Listbox1
  GroupBox 8,22,95,57,"Set Approx. Span",.GroupBox1
  OptionGroup .grp1 
   OptionButton 15, 45, 30, 10, "X Axis" 
   OptionButton 15, 55, 30, 10, "Y Axis" 	
  OKButton 57,50,37,12, .OkBtn
  CheckBox 19,67,70,10, "Rapid Positioning", .Check1
  Text 18,83,100,15, "Delay" 
  TextBox 42,83,30,10, .SecText
  Text 75,83,30,15, "Seconds"
  Text 4,100,50,15, "Span Hold" 
  TextBox 42,100,30,10, .HoldText
  Text 75,100,30,15, "Seconds"
  Text 3,117,50,15, "Safety Gap"
  TextBox 42,117,30,10, .GapTxt
 End Dialog

 Dim Dlg1 As AxisSpanChoice
 Dlg1.grp1 = VarWhichAxis	 'LOAD DEFAULT AXIS
 Dlg1.ApproxTxt = VarApproxSpan  'LOAD APPROX SPAN TEXTBOX WITH DEFAULT VALUE
 Dlg1.Check1 = VarRateOrRapid	 'SET CHECKBOX TO DEFAULT
 Dlg1.SecText = VarDelayInSec	 'LOAD SECONDS TEXTBOX WITH DEFAULT VALUE
 Dlg1.HoldText = VarSpanHold	 'LOAD SPAN HOLD SECONDS WITH DEFAULT VALUE
 Dlg1.GapTxt = Format(VarSafetyGap,"##0.000")	 'LOAD SAFETY GAP 
 Message VarStatusMsg		 'SHOW STATUS MESSAGE OF PROBE/GAGE
 Button = Dialog (Dlg1)		 'SHOW DIALOG AND WAIT FOR BUTTON REPLY

 If Button = 0 Then		 'IF CLOSE BUTTON
  Message "Find Center CANCELED" 'DISPLAY MESSAGE
  End				 'END SCRIPT
 End If	

 'CHECK THAT APPROX SPAN WAS ENTERED NUMERIC
 If IsNumeric(Dlg1.ApproxTxt) = False Then
  MachMsg("*****  APPROXIMATE SPAN MUST BE ENTERED IN NUMERIC FORMAT! *****", _
  "  Substance Abuse Is Not Recommended  ",0)
  RunTheThing			 'RESTART SUB
 End If

 'CHECK THAT SECONDS WAS ENTERED NUMERIC
 If IsNumeric(Dlg1.SecText) = True Then
  VarDelayInSec = Int(Dlg1.SecText)
 Else
  MachMsg("*****  SECONDS MUST BE ENTERED IN NUMERIC FORMAT! *****", _
  "  Stronger Coffee Is Recommended  ",0)
  RunTheThing			 'RESTART SUB
 End If

  'CHECK THAT HOLD SECONDS WAS ENTERED NUMERIC
 If IsNumeric(Dlg1.HoldText) = True Then
  VarSpanHold = Int(Dlg1.HoldText)
 Else
  MachMsg("*****  SECONDS MUST BE ENTERED IN NUMERIC FORMAT! *****", _
  "  Substance Abuse Is Not Recommended  ",0)
  RunTheThing			 'RESTART SUB
 End If

 VarApproxSpan = Dlg1.ApproxTxt	 'APPROXIMATE SPAN 
 VarWhichAxis = Dlg1.grp1	 'AXIS OPTION CHOICE 0=X  1=Y
 VarRateOrRapid = Dlg1.Check1	 'POSITIONING MODE 0=SAFETYRATE  1=RAPID
 VarSafetyGap = Dlg1.GapTxt	 'SAFETY GAP
 
 'CHECK THAT SPAN IS NOT ENTERED AS ZERO
 If VarApproxSpan = 0 Then
  MachMsg("*****  SPAN CANNOT BE ZERO *****", _
  "Stronger Coffee Is Recommended",0)
  RunTheThing			 'RESTART SUB
 End If
End Sub

'----- DIALOG FUNCTION TO ENABLE/DISABLE CONTROLS ------------------------------------------------------------
Function EnableIt( ControlID$, Action%, SuppValue%) 
 Select Case Action%
  Case 1 'SETTINGS FOR DIALOG START
   If VarApproxSpan = 0 Then DlgEnable "OkBtn",0 Else DlgEnable "OkBtn",1
  Case 3 'SETTINGS IF TEXTBOX CONTENT CHANGES
  If ControlID$ = "ApproxTxt" Then
    If SuppValue% = 0 Then DlgEnable "OkBtn",0 Else DlgEnable "OkBtn",1 
  End If
 End Select
End Function

'----- X AXIS SUBROUTINE -------------------------------------------------------------------------------------
Sub RunXCenter
 SetOemDRO(800,0)  		'ZERO X AXIS DRO
 Sleep 200			'DELAY TO ALLOW DRO TO CHANGE
 Message VarStatusMsg &"     X Center Running..."
 Code "G90 G31 X" &VarMaxDistance &"F" &VarFeedRate	'MOVE IN X POS DIRECTION
  While IsMoving()		'WAIT UNTIL MOVE IS COMPLETE BEFORE PROCEEDING
   Wend
 If GetVar(2000) >= (VarMaxDistance - .001) Then 'GET CONTACT POSITION AND TEST FOR MAX TRAVEL   
  MachMsg("Maximum Travel Reached. Reposition X Axis Closer To Part And Try Again!","*** OOPS! ***",0)
  Message ""
  RETURNSTATE                    'CALL REINSTATE SUBROUTINE
  End
 Else
  Beep
  Code "G90 G0 X" &GetVar(2000)	'MOVE TO CONTACT POINT DUE TO OVERRUN
   While IsMoving()
    Wend
  SetOemDRO(800,0)		'ZERO X AXIS DRO
  Sleep 200
  Code "G90" &VarLinearMode &"X-" &VarStandOff &VarSafetyRate	'MOVE TO X- STANDOFF
   While IsMoving ()
    Wend
 End If
 Code "G90" &VarLinearMode &"Z" &VarStandOff &VarSafetyRate	'MOVE TO Z STANDOFF
  While IsMoving ()
   Wend
 VarSpanLocation = (VarSafetyGap+VarProbeDia+(VarGageThick*2)+CDbl(VarApproxSpan)) 'CALC SPAN LOCATION
 Code "G90" &VarLinearMode &"X" &VarSpanLocation &VarSafetyRate 'MOVE TO SPAN LOCATION
  While IsMoving ()
   Wend
 VarSpanDro = GetOemDRO(800) - Var2ndDist    'CAPTURE SPAN LOCATION DRO AND CALC SPAN2   
 VarDelayInSec = VarSpanHold	'SAFETY DELAY
 COUNTDOWN			'CALL COUNTDOWN SUBROUTINE
 Message VarStatusMsg &"     X Center Continuing..."
 Code "G90" &VarLinearMode &"Z" &VarInitialZ &VarSafetyRate	'MOVE DOWN TO PREVIOUS Z LOCATION
  While IsMoving()		'WAIT UNTIL MOVE IS COMPLETE BEFORE PROCEEDING
   Wend
 Code "G91 G31 X-" &Var2ndDist &"F" &VarFeedRate	'MOVE IN X NEG DIRECTION
  While IsMoving()		'WAIT UNTIL MOVE IS COMPLETE BEFORE PROCEEDING
   Wend
 Beep
 If GetVar(2000) <= (VarSpanDro + .001) Then 'GET CONTACT POSITION AND TEST FOR MAX TRAVEL   
  MachMsg("Maximum Travel Reached. Reposition And Try Again!","*** OOPS! ***",0)
  Message "Find Center CANCELED" 'DISPLAY MESSAGE
  End				 'END SCRIPT
 End  If
 Code "G90 G0 X" &GetVar(2000)	'MOVE TO CONTACT POINT DUE TO OVERRUN
  While IsMoving()
   Wend
 VarSpanHit = GetVar(2000)/2	'CALCULATE CENTER X LOCATION
 VarSpanCalc = GetVar(2000)	'GET SPAN HIT DISTANCE FOR STATUS
 Code "G91" &VarLinearMode &"X+" &VarStandOff &VarSafetyRate	'MOVE TO X+ STANDOFF
  While IsMoving()
   Wend
 Code "G90" &VarLinearMode &"Z" &VarStandOff &VarSafetyRate	'MOVE TO Z STANDOFF
  While IsMoving()
   Wend
 Code "G90" &VarLinearMode &"X" &VarSpanHit &VarSafetyRate	'MOVE TO X CENTER
  While IsMoving()
   Wend
 Select Case GetParam("Units")		'SET INFORMATION FOR STATUS LINE DISPLAY
  Case 0  'MM
    VarSpanX = Format(VarSpanCalc-VarProbeDia-(VarGageThick*2),"###0.000") 'CALCULATE SPAN FOR STATUS
  Case 1  'INCH
    VarSpanX = Format(VarSpanCalc-VarProbeDia-(VarGageThick*2),"##0.0000") 'CALCULATE SPAN FOR STATUS
 End Select
 SetOemDRO(800,0)  		'ZERO X AXIS DRO
 Sleep 200
End Sub

'----- Y AXIS SUBROUTINE -------------------------------------------------------------------------------------
Sub RunYCenter
 SetOemDRO(801,0)  		'ZERO Y AXIS DRO
 Sleep 200			'DELAY TO ALLOW DRO TO CHANGE
 Message VarStatusMsg &"     Y Center Running..."
 Code "G90 G31 Y" &VarMaxDistance &"F" &VarFeedRate	'MOVE IN Y POS DIRECTION
  While IsMoving()		'WAIT UNTIL MOVE IS COMPLETE BEFORE PROCEEDING
   Wend
 If GetVar(2001) >= (VarMaxDistance - .001) Then 'GET CONTACT POSITION AND TEST FOR MAX TRAVEL   
  MachMsg("Maximum Travel Reached. Reposition Y Axis Closer To Part And Try Again!","*** OOPS! ***",0)
  Message ""
  RETURNSTATE                    'CALL REINSTATE SUBROUTINE
  End
 Else
  Beep
  Code "G90 G0 Y" &GetVar(2001) 	'MOVE TO CONTACT POINT DUE TO OVERRUN
   While IsMoving()
    Wend
  SetOemDRO(801,0)		'ZERO Y AXIS DRO
  Sleep 200
  Code "G90" &VarLinearMode &"Y-" &VarStandOff &VarSafetyRate	'MOVE TO Y- STANDOFF
   While IsMoving ()
    Wend
 End If
 Code "G90" &VarLinearMode &"Z" &VarStandOff &VarSafetyRate	'MOVE TO Z STANDOFF
  While IsMoving ()
   Wend
 VarSpanLocation = (VarSafetyGap+VarProbeDia+(VarGageThick*2)+CDbl(VarApproxSpan)) 'CALC SPAN LOCATION
 Code "G90" &VarLinearMode &"Y" &VarSpanLocation &VarSafetyRate 'MOVE TO SPAN LOCATION
  While IsMoving ()
   Wend
 VarSpanDro = GetOemDRO(801) - Var2ndDist     'CAPTURE SPAN LOCATION DRO AND CALC SPAN2   
 VarDelayInSec = VarSpanHold	'SAFETY DELAY
 COUNTDOWN			'CALL COUNTDOWN SUBROUTINE
 Message VarStatusMsg &"     Y Center Continuing..."
 Code "G90" &VarLinearMode &"Z" &VarInitialZ &VarSafetyRate	'MOVE DOWN TO PREVIOUS Z LOCATION
  While IsMoving()		'WAIT UNTIL MOVE IS COMPLETE BEFORE PROCEEDING
   Wend
 Code "G91 G31 Y-" &Var2ndDist &"F" &VarFeedRate	'MOVE IN Y NEG DIRECTION
  While IsMoving()		'WAIT UNTIL MOVE IS COMPLETE BEFORE PROCEEDING
   Wend
 Beep
 If GetVar(2001) <= (VarSpanDro + .001) Then 'GET CONTACT POSITION AND TEST FOR MAX TRAVEL   
  MachMsg("Maximum Travel Reached. Reposition And Try Again!","*** OOPS! ***",0)
  Message "Find Center CANCELED" 'DISPLAY MESSAGE
  End				 'END SCRIPT
 End  If
 Code "G90 G0 Y" &GetVar(2001)	'MOVE TO CONTACT POINT DUE TO OVERRUN
  While IsMoving()
   Wend
 VarSpanHit = GetVar(2001)/2	'CALCULATE CENTER Y LOCATION
 VarSpanCalc = GetVar(2001)	'GET SPAN HIT DISTANCE FOR STATUS
 Code "G91" &VarLinearMode &"Y+" &VarStandOff &VarSafetyRate	'MOVE TO Y+ STANDOFF
  While IsMoving()
   Wend
 Code "G90" &VarLinearMode &"Z" &VarStandOff &VarSafetyRate	'MOVE TO Z STANDOFF
  While IsMoving()
   Wend
 Code "G90" &VarLinearMode &"Y" &VarSpanHit &VarSafetyRate	'MOVE TO Y CENTER
  While IsMoving()
   Wend
 Select Case GetParam("Units")		'SET INFORMATION FOR STATUS LINE DISPLAY
  Case 0  'MM
    VarSpanY = Format(VarSpanCalc-VarProbeDia-(VarGageThick*2),"###0.000") 'CALCULATE SPAN FOR STATUS
  Case 1  'INCH
    VarSpanY = Format(VarSpanCalc-VarProbeDia-(VarGageThick*2),"##0.0000") 'CALCULATE SPAN FOR STATUS
 End Select
 SetOemDRO(801,0)  		'ZERO Y AXIS DRO
 Sleep 200
End Sub
'*************************************************************************************************************