Zeroing Macro For Carbide3D BitZero

CthulhuLabs

So I am in the process of converting my Shapeoko CNC to use a Duet 3 6HC running 3.3-rc3 RRF. I have the motion system working great. I am now moving onto getting the probes I have for it working. The first one I am working on is their BitZero:

https://shop.carbide3d.com/collections/accessories/products/bitzero-v2?variant=32936948236349

which is similar to the OpenBuilds XYZ Probe. I want to mimic the way Carbide3D has the probe working in their Carbide Motion software. They have you

Insert a precision ground dowel pin into your spindle instead of a cutter
Align the BitZero on the corner of your workpiece
Attach the Magnetic lead to the dowel pin
Then you jog spindle so the dowel pin so that it is in the hole
Start the probing sequence
The spindle moves to the right till the dowel pin touches the right wall of the hole
The spindle moves to the left till the dowel pin touches the left wall of the hole
The spindle moves to the spot exactly in the middle of the two and sets that as work X zero
The spindle moves towards the back of the machine till the dowel pin touches the back wall of the hole
The spindle moves towards the front of the machine till the dowel ping touches the front wall of the hole
The spindle moves to the spot exactly in the middle of the two and sets that as work Y zero
The spindle raises till it is above the probe plate
The spindle moves about 20mm in both X and Y towards machine home
The spindle dives till the dowel pin touches the probe plate
The Z position minus the thickness of the probe plate is saved as the work Z zero

This seems like the perfect job for Gcode Meta Commands. Here is what I have so far:

M291 P"Please insert a dowel pin into your spindle and jog it so the dowel pin is in the BitZero's hole" R"BitZero" S3 X1 Y1 Z1

var XMaxPos = 0;
var XMinPos = 0;
var XZeroPos = 0;
var YMaxPos = 0;
var YMinPos = 0;
var YZeroPos = 0;

var CoordSystem = 20;

; If the printer hasnt been homed, home it
if !move.axes[0].homed || !move.axes[1].homed || !move.axes[2].homed
	G28
	
G21							; Metric

; Find X Zero
G91							; Relative positioning
G38.2 P0 X50 F100					; Seek right along X until contact with probe plate
set var.XMaxPos = {move.axes[0].machinePosition}	; Save our current X position as the max

G38.2 P0 X-50 F100					; Seek left along X until contact with probe plate
set var.XMinPos = {move.axes[0].machinePosition}    	; Save our current X position as the min
set var.XZeroPos = {(var.XMinPos + var.XMaxPos) / 2}	; Find the Spot in the middle
G90							; Absolute positioning
G1 X{var.XZeroPos}					; Move to the middle spot
G10 L{var.CoordSystem} X0				; Store probe offsets in the work offset co-ordinates system for X


; Find Y Zero
G91							; Relative positioning
G38.2 P0 Y50 F100					; Seek up along Y until contact with probe plate
set var.YMaxPos = {move.axes[1].machinePosition}	; Save our current Y position as the max
	
G38.2 P0 Y-50 F100					; Seek down along Y until contact with probe plate
set var.YMinPos = {move.axes[1].machinePosition}    	; Save our current Y position as the min

set var.YZeroPos = {(var.YMinPos + var.YMaxPos) / 2}	; Find the Spot in the middle

G90							; Absolute positioning
G1 Y{var.YZeroPos}					; Move to the middle spot
G10 L{var.CoordSystem} Y0				; Store probe offsets in the work offset co-ordinates system for Y
G91							; Relative positioning


; Find Z Zero
; TODO add code here for zeroing Z



G90							; Absolute positioning

This is the first time I have ever programmed with the Meta Commands so I was hoping someone could look this over and check if I missed anything. I would hate to break my probe by doing something dumb.

I plan on writing this Macro in such a way that it can be used with other probes of this sort.

CthulhuLabs

Well I tried my Macro and it does not get past the first G38.2 command:

var XMaxPos = 0;
var XMinPos = 0;
var XZeroPos = 0;
var YMaxPos = 0;
var YMinPos = 0;
var YZeroPos = 0;
 
var CoordSystem = 20;
 
; If the printer hasnt been homed, home it
if !move.axes[0].homed || !move.axes[1].homed || !move.axes[2].homed
	G28
	

M291 P"Please insert a dowel pin into your spindle and jog it so the dowel pin is in the BitZero's hole" R"BitZero" S3 X1 Y1 Z1

G21							; Metric
M291 P"Metric" R"BitZero" S3
 
; Find X Zero
G91							; Relative positioning
M291 P"Relative" R"BitZero" S3

G38.2 P0 X50 F100					; Seek right along X until contact with probe plate
M291 P{"X Max " ^ move.axes[0].machinePosition} R"BitZero" S3

set var.XMaxPos = {move.axes[0].machinePosition}	; Save our current X position as the max
 
G38.2 P0 X-50 F100					; Seek left along X until contact with probe plate
set var.XMinPos = {move.axes[0].machinePosition}    	; Save our current X position as the min
set var.XZeroPos = {(var.XMinPos + var.XMaxPos) / 2}	; Find the Spot in the middle
G90							; Absolute positioning
G1 X{var.XZeroPos}					; Move to the middle spot
G10 L{var.CoordSystem} X0				; Store probe offsets in the work offset co-ordinates system for X
 
 
; Find Y Zero
G91							; Relative positioning
G38.2 P0 Y50 F100					; Seek up along Y until contact with probe plate
set var.YMaxPos = {move.axes[1].machinePosition}	; Save our current Y position as the max
	
G38.2 P0 Y-50 F100					; Seek down along Y until contact with probe plate
set var.YMinPos = {move.axes[1].machinePosition}    	; Save our current Y position as the min
 
set var.YZeroPos = {(var.YMinPos + var.YMaxPos) / 2}	; Find the Spot in the middle
 
G90							; Absolute positioning
G1 Y{var.YZeroPos}					; Move to the middle spot
G10 L{var.CoordSystem} Y0				; Store probe offsets in the work offset co-ordinates system for Y
G91							; Relative positioning
 
 
; Find Z Zero
; TODO add code here for zeroing Z
 
 
 
G90							; Absolute positioning

The first three dialog boxes pop up and then everything stops. Here is my config:

; Configuration file for Duet 3 (firmware version 3)
; executed by the firmware on start-up
;
; General preferences
G90                                         ; send absolute coordinates...
M83                                         ; ...but relative extruder moves
M550 P"Duetoko"                             ; set printer name
 
; Dual Y
M584 X0.0 Y0.1:0.2 Z0.3
 
; Drives
M569 P0.0 S1                                ; X  physical drive 0.0 direction (0 = backwards, 1 = forwards (default 1))
M569 P0.1 S1                                ; Y1 physical drive 0.1 direction (0 = backwards, 1 = forwards (default 1))
M569 P0.2 S0                                ; Y2 physical drive 0.2 direction (0 = backwards, 1 = forwards (default 1))
M569 P0.3 S1                                ; Z  physical drive 0.3 direction (0 = backwards, 1 = forwards (default 1))
 
M350 X16 Y16 Z16 I1                         ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z640.00                   ; set steps per mm
M566 X900.00 Y900.00 Z100.00                ; set maximum instantaneous speed changes (mm/min)
M203 X10000.00 Y10000.00 Z800.00           ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z100.00                ; set accelerations (mm/s^2)
M906 X1900 Y1900 Z1900 I40                  ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                     ; set idle timeout
 
; Axis Limits
M208 X-845 Y-850 Z-150 S1                            ; set axis minima ( 0 = set axis maximum (default), 1 = set axis minimum)
M208 X0 Y0 Z0 S0                      ; set axis maxima ( 0 = set axis maximum (default), 1 = set axis minimum)
 
; Endstops
M574 X2 S1 P"!io0.in"                       ; configure active-high endstop for low  end on X via pin io0.in
M574 Y2 S1 P"!io1.in"                       ; configure active-high endstop for low  end on Y via pin io1.in
M574 Z2 S1 P"!io2.in"                       ; configure active-high endstop for high end on Z via pin io2.in
 
; OUT
M950 F0 C"!out6+out6.tach"                  ; create fan 0 on pin out6 
M106 P0 S255                                ; set fan 0 to 190 speed (max 255)
 
; Tools
M950 R0 C"io6.out" L40000 Q50               ; Spindle acts like a 3.3V RC Servo on io6.out
M563 P0 R0 F0 S"Spindle"                    ; define tool 0 as controllable spindle
G10 P0 X0 Y0 Z0                             ; set tool 0 axis offsets
T0                                          ; select tool 0

; BitZeroV2
M558 K0 P8 C"!io3.in" H20 F120 T300        ; Z probe 0
G31 K0 P500 X0 Y0 Z10
 
; General
G54                                         ; Use Workspace coordinate system
M453                                        ; CNC Mode
M564 S0 H0                                  ; Allow movement without homing (without axis maxima)

CthulhuLabs

I was an idiot. The spindle was moving. Just doing so slowly I did not see it. All the same I ran into a bunch of issues with the G38.2 command and ended up redoing my code based off someone else's macro. Here it is:

var ProbeThickness = 13;
var ProbeXWidth = 58;
var ProbeYWidth = 58;
var CoordSystem	= 20;

; If the printer hasn't been homed, home it
if !move.axes[0].homed || !move.axes[1].homed || !move.axes[2].homed
	G28

M291 P"Insert a Dowel Pin into your spindle and center it in the probes hole" R"Probing" S3 X1 Y1 Z1

; Find center of cavity
M675 X R2 F300 K0							; Find center in X axis
M675 Y R2 F300 K0							; Find center in Y axis

G10 P1 L{var.CoordSystem} X0 Y0						; Store X and Y as zero in CoordSystem
 
; Set bit above center of probe
G91									; relative positioning
G0 Z{var.ProbeThickness + 2}						; rapid move Z axis over the surface of the probe
G0 X{var.ProbeXWidth / 2} Y{var.ProbeYWidth / 2}			; rapid move X and Y axis to middle of probe
 
; Probe Z component
G38.2 Z{move.axes[2].userPosition - (var.ProbeThickness + 2.25)}	; seek until the probe circuit is closed Z-axis 25 mm
G0 Z5									; rapid move Z axis 5 mm

G10 P1 L{var.CoordSystem} Z{var.ProbeThickness + 5}			; store relative probe offset for coordinates system 1
G0 X{(var.ProbeXWidth / 2) * -1} Y{(var.ProbeYWidth / 2) -1}		; go back over the hole

G90									; Absolute positioning