G30 won't go far enough to reach probe

RedWagon · 16 Jun 2019, 20:55

I have an endstop setup as a Z probe so it can be assigned to multiple axes
https://forum.duet3d.com/topic/10918/one-endstop-for-multiple-axes

When I run G30 the printer only goes down about 10mm (default dive height x2?) then throws the error:

Error: Z probe was not triggered during probing move

I've been searching around but I haven't found anything that can get it to move down further to hit the probe.

homeall.g

; Home All
G91 ; relative movement
G1 Z4 F100 H1; ensure head is clear of the bed
G1 S1 X-200 F3000 ; move radius towards minimum until the endstop switch is triggered
G1 S2 X5 ; move radius out by 5mm
G1 S1 X-20 F600 H1; move radius slowly to the endstop switch again
; Home Bed
G90 ; absolute movement
G1 S2 X10 ; move to 10mm from centre of bed 
G92 X10 Y0 ; define current position as X10 Y0
; Home Z
G30 ; lower head, stop when probe triggered and set Z to trigger height

homez.g

G91 ; relative movement
G1 Z4 F200 H1; raise head 4mm to ensure it is above the Z probe trigger height
G90 ; back to absolute mode
G30 ; lower head, stop when probe triggered and set Z to trigger height

My best guess is to assign a Z endstop to the Z probe so I can do a G1 move down until the endstop is triggered but that seems unnecessarily convoluted.

Printer is a Polar3D.
config.g

; Configuration file for factory testing Duet Ethernet and Wifi with V2.02 firmware

*******************************************************************************************************************
FOR TESTING ONLY! USE https://configurator.reprapfirmware.org/ to generate configuration files for your printer!
*******************************************************************************************************************


; Communication and general
M111 S0                            		; Debug off
M550 PDuetTest					; Machine name and Netbios name (can be anything you like)
M551 redacted              			; Machine password (used for FTP)

;*** Networking
M587 redacted 
M552 S1						; Turn network on

M555 P2						; Set output to look like Marlin
G21						; Work in millimetres
G90						; Send absolute coordinates...
M83						; ...but relative extruder moves

; No bed heater
M140 H-1

; Disable Fan 1 thermostatic mode
M106 P1 H-1

; Axis and motor configuration
M569 P0 S0					; Drive 0 goes forwards
M569 P1 S1					; Drive 1 goes forwards
M569 P2 S0					; Drive 2 goes forwards
M569 P3 S1					; Drive 3 goes forwards
M558 P4 I1
M574 X1 S2
M574 Y0					; radius homing switch present, no turntable homing switch
M669 K7 R0:150 H0.3 F30 A30 			; set Polar kinematics parameters
M666 X0 Y0 Z0					; put your endstop adjustments here, or let auto calibration find them
M350 X16 Y16 Z16 E16:16 I1			; Set 16x microstepping with interpolation
M92 X80 Y80 Z2560			 	; Set axis steps/mm
M906 X1000 Y1000 Z1000 E800 I60			; Set motor currents (mA) and increase idle current to 60%
M201 X1000 Y1000 Z1000 E1000			; Accelerations (mm/s^2)
M203 X6000 Y6000 Z100 E3600 			; maximum linear speeds mm/minute
M566 X1200 Y1200 Z1200 E1200			; Maximum instant speed changes mm/minute

; Thermistors
M305 P1 T100000 B3974 R4700 H30 L0		; Put your own H and/or L values here to set first nozzle thermistor ADC correction

M570 S180					; Hot end may be a little slow to heat up so allow it 180 seconds

; Fans
M106 P1 S-1					; disable thermostatic mode for fan 1

; Tool definitions
M563 P0 D0 H1					; Define tool 0
G10 P0 S0 R0					; Set tool 0 operating and standby temperatures
M92 E80:80					; Set extruder steps per mm

; Z probe and compensation definition
;*** If you have a switch instead of an IR probe, change P1 to P4 in the following M558 command. 
; M558 P4 F100 T6000 X0 Y0 Z0 H3		; Z probe is a Smart Effector and is not used for homing any axes R0.4 not used. Reduced F300 to 100
; G31 P100 X0 Y0 Z-0.25				; Set the zprobe height and threshold for Smart Effector

;*** If you are using axis compensation, put the figures in the following command
M556 S78 X0 Y0 Z0				; Axis compensation here

M208 S1 Z-0.2					; set minimum Z

T0						; select first hot end
; M117 Use https://configurator.reprapfirmware.org/ to set up your printer config

Phaedrux · 16 Jun 2019, 21:00

@redwagon said in G30 won't go far enough to reach probe:

; Z probe and compensation definition
;*** If you have a switch instead of an IR probe, change P1 to P4 in the following M558 command.
; M558 P4 F100 T6000 X0 Y0 Z0 H3 ; Z probe is a Smart Effector and is not used for homing any axes R0.4 not used. Reduced F300 to 100
; G31 P100 X0 Y0 Z-0.25 ; Set the zprobe height and threshold for Smart Effector

All your probe definition commands are commented out.

dc42 · 16 Jun 2019, 21:38

You need to set the Z axis maximum using M208. A plain G30 with no other parameters or just one S parameter will go down up to 1.1 times the length of the Z axis that you declare using M208.

Nightreaver · 17 Jun 2019, 14:38

That happens to me once in a while. For homeall and homez is replaced all G30 with G30 Z-99999

I think that fixes it.

RedWagon · 17 Jun 2019, 23:34

Sorry, I commented out the default ones but the probe is defined earlier with:

M558 P4 I1

I've tried several combinations of the suggestions above but they all do the same thing.

G20
G30 Z-99999
G30 Z-200
M208 Z200
G30
G30 Z-99999
G30 Z-200
M208 S1 Z-200
G30
G30 Z-9999
M208 Z0:200
G30 
G30 Z-999999
M208 Z-200:200sG30 Z-9999
G30
G30 Z-99999

I measured and it dives for 10mm then returns to its original height.

From reading the docs it doesn't really sound like I should be doing a large dive for G30. Do I need to run G28 first with the endstop assigned to Z probe?

dc42 · 18 Jun 2019, 12:45

Does your Z axis move the correct amount? For example, if you send G91 followed by G1 S2 Z50 does it move the print head up or the bed down 50mm?

RedWagon · 18 Jun 2019, 14:26

It's off by a little bit; right now it's travelling 8mm per 10mm. Shouldn't be enough for it to run through the max axis settings and not trigger the probe. I tested by doing a G92 Z0 then moving it around manually.

dc42 · 18 Jun 2019, 15:34

@redwagon said in G30 won't go far enough to reach probe:

It's off by a little bit; right now it's travelling 8mm per 10mm. Shouldn't be enough for it to run through the max axis settings and not trigger the probe. I tested by doing a G92 Z0 then moving it around manually.

It sounds to me that either your Z steps/mm is a little off, or your Z speed or acceleration is set too high. I suggest you find out which:

Calculate the Z steps/mm from the pitch/lead of your leadscrew mor the belt pitch and number of pulley teeth
If you think you have set the correct Z steps/mm, try reducing Z speed and/or acceleration in M203 and M201

When you have the Z movement sorted, try plain G30 with no parameters.

RedWagon · 14 Jul 2019, 15:37

I've adjusted the Z steps/mm and lowered speed and acceleration. No changes; G30 by itself still lowers 10mm and throws the "Z probe was not triggered during probing move" error.

RedWagon · 14 Jul 2019, 15:42

config.g

M555 P2						; Set output to look like Marlin
G21						; Work in millimetres
G90						; Send absolute coordinates...
M83						; ...but relative extruder moves

; No bed heater
M140 H-1

; Disable Fan 1 thermostatic mode
M106 P1 H-1

; Axis and motor configuration
M569 P0 S0					; Drive 0 goes forwards
M569 P1 S1					; Drive 1 goes forwards
M569 P2 S0					; Drive 2 goes forwards
M569 P3 S1					; Drive 3 goes forwards
M558 P4 I1					; use E0 endstop as Z probe
M574 X1 S2					; bind X homing switch to Z probe
M574 Y0						; radius homing switch present, no turntable homing switch
M669 K7 R0:150 H0.3 F30 A30 			; set Polar kinematics parameters
M666 X0 Y0 Z0					; put your endstop adjustments here, or let auto calibration find them
M350 X16 Y16 Z16 E16:16 I1			; Set 16x microstepping with interpolation
M92 X80 Y80 Z3200			 	; Set axis steps/mm
M906 X1000 Y1000 Z1000 E800 I60			; Set motor currents (mA) and increase idle current to 60%
M201 X1000 Y1000 Z100 E1000			; Accelerations (mm/s^2)
M203 X6000 Y6000 Z100 E3600 			; maximum linear speeds mm/minute
M566 X1200 Y1200 Z1200 E1200			; Maximum instant speed changes mm/minute

; Thermistors
M305 P1 T100000 B3974 R4700 H30 L0		; Put your own H and/or L values here to set first nozzle thermistor ADC correction

M570 S180					; Hot end may be a little slow to heat up so allow it 180 seconds

; Fans
M106 P1 S-1					; disable thermostatic mode for fan 1

; Tool definitions
M563 P0 D0 H1					; Define tool 0
G10 P0 S0 R0					; Set tool 0 operating and standby temperatures
M92 E80:80					; Set extruder steps per mm

;*** If you are using axis compensation, put the figures in the following command
M556 S78 X0 Y0 Z0				; Axis compensation here

M208 Z-0.2:200					; set axis travel limits

T0						; select first hot end

homeall.g

; Home All
G91 ; relative movement
G1 Z4 F100 H1; ensure head is clear of the bed
G1 S1 X-200 F3000 ; move radius towards minimum until the endstop switch is triggered
G1 S2 X5 ; move radius out by 5mm
G1 S1 X-20 F600 H1; move radius slowly to the endstop switch again
; Home Bed
G90 ; absolute movement
G1 S2 X10 ; move to 10mm from centre of bed 
G92 X10 Y0 ; define current position as X10 Y0
; Home Z
; G1 X0 Y0 ; put head over the centre of the bed, or wherever you want to probe
G30 ; lower head, stop when probe triggered and set Z to trigger height

homebed.g

G91 ; relative movement
G1 Z4 F100 H1 ; ensure head is clear of the bed
G90 ; absolute movement
G1 S2 X0 ; move to centre of bed 
G92 X0 Y0 ; define current position as X0 Y0
G91 ; relative movement
G1 Z-4 F100 H1; restore original Z position

homedelta.g

; Example Homing file for RepRapFirmware on delta printer

;M117 Use https://configurator.reprapfirmware.org/ to set up your printer config

;G91							; use relative positioning
;******* Change F250 in the following line to F2500 when you are finished commissioning
;******* Change 320 in the following to a higher value if your Kossel has taller towers
;G1 S1 X320 Y320 Z320 F2500	; move all carriages up 320mm, stopping at the endstops
;G1 S2 X-3 Y-3 Z-3			; move all carriages down 3mm
;G1 S1 X6 Y6 Z6 F250			; move carriages slowly up 6mm, stopping at the endstops
;G1 Z-5 F2000				; down a few mm so that we can centre the head
;G90							; back to absolute positioning
;G1 X0 Y0 F2000				; centre the head and set a reasonable feed rate

homeradius.g

G91 ; relative movement
G1 Z4 F100 H1; ensure head is clear of the bed
G1 S1 X-200 F3000 ; move radius towards minimum until the endstop switch is triggered
G1 S2 X5 ; move radius out by 5mm
G1 S1 X-20 F600 ; move radius slowly to the endstop switch again
G1 Z-4 F100 H1; restore original Z position

homez.g

G91 ; relative movement
G1 Z4 F200 H1; raise head 4mm to ensure it is above the Z probe trigger height
G90 ; back to absolute mode
;G1 X0 Y0 ; put head over the centre of the bed, or wherever you want to probe
G30 ; lower head, stop when probe triggered and set Z to trigger height

dc42 · 14 Jul 2019, 19:28

Have you tested the Z probe? https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe

RedWagon · 2 Sept 2019, 19:25

I ran through those tests and still get the same results. I have to manually move the printer within 5mm of the Z probe triggering or it will give the error "Z probe was not triggered during probing move"

RedWagon · 2 Sept 2019, 19:34

Finally fixed it!

The missing command was setting the Z endstop to the Z probe with M574 Z1 S2