Probe centering macro: G60 or WCS?

sinned6915

I was looking at DiaBase's probe centering macro and it utilizes G60 memory store/recall for positions. It also has some interesting commented out gcode variable calls which got me to thinking about what might be the best approach.

Is there a difference in memory or processing speed using variables or stored memory?

Its quite a novel approch and well documented- finding a coarse X center followed by fine Y and then fine X center.

M291 P"Bed will now move. Is Probe inside cavity?" R"Crash Check" S3

M561

M574 X1 Y1 S2; configured to use Probe


; var local.probeTipRadius = 3 ; in mm

M400
G60 S1                                     ; Save start position to slot 1


; Probe in X direction ("coarse")
M558 K0 F150
G38.2 X{move.axes[0].userPosition + 6} P0 ; Adjust the + n amount to the travel limit (expected hole diameter is an upper bound)
M400
G60 S2                                     ; Save +X position to slot 2
G0 X0 R1 F300                              ; Return X to start position (disengage the probe) (slot 1)
G38.2 X{move.axes[0].userPosition - 6} P0 ; Ajust the - n amount to the travel limit
G53 G0 X{move.axes[0].machinePosition + ((state.restorePoints[2].coords[0] - move.axes[0].machinePosition) / 2.0)} ; Move to pretty good X-value of hole center

; Probe in Y direction ("fine")
G38.2 Y{move.axes[1].userPosition + 8} P0 ; Adjust the + n amount to the travel limit
M400
G60 S3                                     ; Save +Y position to slot 3
G0 Y0 R1 F300                              ; Return Y to start position (disengage the probe) (slot 1)
G38.2 Y{move.axes[1].userPosition - 8} P0 ; Adjust the - n amount to the travel limit
; M400
; var global.yHoleDiameter = {state.restorePoint[3].coords[1] - move.axes[1].userPosition + (2.0 * local.probeTipRadius)}
G53 G0 Y{move.axes[1].machinePosition + ((state.restorePoints[3].coords[1] - move.axes[1].machinePosition) / 2.0)} F300; Move to very good Y-value of hole center

M400
G60 S1                                     ; Save "pretty good X" and "very good Y" position to slot 1
M558 K0 F100
; Probe in X direction ("fine")
G38.2 X{move.axes[0].userPosition + 8} P0 ; Adjust the + n amount to the travel limit
M400
G60 S4                                     ; Save +X position to slot 4
G0 X0 R1 F300                              ; Return X to pretty good center position (disengage the probe) (slot 1)
G38.2 X{move.axes[0].userPosition - 8} P0 ; Ajust the - n amount to the travel limit
; M400
; var global.xHoleDiameter = {state.restorePoint[4] - move.axes[0].userPosition + (2.0 * local.probeTipRadius)}
; var global.averageHoleDiameter = {(global.xHoleDiameter + global.yHoleDiameter) / 2.0}
; var global.diameterDifference = {global.xHoleDiameter - global.yHoleDiameter}
G53 G0 X{move.axes[0].machinePosition + ((state.restorePoints[4].coords[0] - move.axes[0].machinePosition) / 2.0)} F300; Move to very good X-value of hole center
M558 K0 F150