RRF 3 with piezo z probe not working

[Citystars]

Hi,

i have the new firmware on my duet 2 wifi v3.2
Changed all the settings for the new firmware but i can't get it to work with the piezo z probe.
Im using the precision piezo on the extruder, it worked on the other firmware.
When i touch the extruder i see in the web the value change from 0 to 1000.
But the motor doesn't stop.
Thats what i found on the wiki:
https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_M558

Here is my config.g

; Endstops
M574 X2 S1 P"xstop"                                ; configure active-high endstop for high end on X via pin xstop
M574 Y2 S1 P"ystop"                                ; configure active-high endstop for high end on Y via pin ystop
M574 Z0 P"nil" 					     ; no Z endstop switch, free up Z endstop input							                     
 
; Z-Probe
M558 P5 C"!zstop" H2 F120 T3000  ; Z probe connected to Z endstop input
G31 P600 X0 Y0 Z-0.1   
M557 X25:280 Y25:270 S13       ; Define mesh grid

Thank you

[Phaedrux]

@Citystars said in RRF 3 with piezo z probe not working:

it worked on the other firmware.

What was the other firmware?

@Citystars said in RRF 3 with piezo z probe not working:

M574 Z0 P"nil"

You can delete that line entirely.

@Citystars said in RRF 3 with piezo z probe not working:

M558 P5 C"!zstop" H2 F120 T3000

Are you using G30 to test?

What version of precision piezo is it? It's sometimes recommended to use M558 P8 instead.

[Citystars]

@Phaedrux

Thank you for the fast reply
The other version is was using was V2.02
In the other version i was using

; Endstops
M574  S1                          ; Set active high endstops
M574 X1 Y1 Z1 S0
 
; Z-Probe
M558 P7 I1 H2 R1 F100 T1000       ; Set Z probe type to switch and the dive height + speeds
G31 P600 X0 Y0 Z-0.05          ; Set Z probe trigger value, offset and trigger height

Im using the Precision Piezo Orion kit.

Not using the G30 to test.
Just making sure the bed is low enough and homing Z axis and pressing on the extruder to see if it stops.

Thank you

[Phaedrux]

@Citystars said in RRF 3 with piezo z probe not working:

Not using the G30 to test.
Just making sure the bed is low enough and homing Z axis and pressing on the extruder to see if it stops.

Ok, but how is it homing the Z axis?

Post your homing files.

[Citystars]

@Phaedrux

Im just using the home Z axis button on the web.
They are standaard configurations from the RepRapFirmware Configuration Tool.

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.2.1 on Mon Jan 11 2021 21:00:16 GMT+0100 (Midden-Europese standaardtijd)
G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 H1 X-305 Y-293 F1800 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X-305             ; home X axis
G1 H1 Y-293             ; home Y axis
G1 X5 Y5 F6000          ; go back a few mm
G1 H1 X-305 F360        ; move slowly to X axis endstop once more (second pass)
G1 H1 Y-293             ; then move slowly to Y axis endstop
G1 H1 Z-385 F360        ; move Z down stopping at the endstop
G90                     ; absolute positioning
G92 Z0                  ; set Z position to axis minimum (you may want to adjust this)
 
; Uncomment the following lines to lift Z after probing
;G91                    ; relative positioning
;G1 Z5 F100             ; lift Z relative to current position
;G90                    ; absolute positioning

; homex.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.2.1 on Mon Jan 11 2021 21:00:16 GMT+0100 (Midden-Europese standaardtijd)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 X-305 F1800 ; move quickly to X axis endstop and stop there (first pass)
G1 X5 F6000       ; go back a few mm
G1 H1 X-305 F360  ; move slowly to X axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning

; homey.g
; called to home the Y axis
;
; generated by RepRapFirmware Configuration Tool v3.2.1 on Mon Jan 11 2021 21:00:16 GMT+0100 (Midden-Europese standaardtijd)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Y-293 F1800 ; move quickly to Y axis endstop and stop there (first pass)
G1 Y5 F6000       ; go back a few mm
G1 H1 Y-293 F360  ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.2.1 on Mon Jan 11 2021 21:00:16 GMT+0100 (Midden-Europese standaardtijd)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Z-385 F1800 ; move Z down until the endstop is triggered
G92 Z0            ; set Z position to axis minimum (you may want to adjust this)
 
; Uncomment the following lines to lift Z after probing
;G91              ; relative positioning
;G1 Z5 F100       ; lift Z relative to current position
;G90              ; absolute positioning

[Phaedrux]

@Citystars said in RRF 3 with piezo z probe not working:

G1 H1 Z-385 F360 ; move Z down stopping at the endstop G90 ; absolute positioning G92 Z0 ; set Z position to axis minimum (you may want to adjust this)

Ok, there's your problem. the part that homes the Z axis is using endstop homing commands rather than the probe.

In homeall change this

G1 H1 Z-385 F360        ; move Z down stopping at the endstop
G90                     ; absolute positioning
G92 Z0                  ; set Z position to axis minimum (you may want to adjust this)

To this

G1 X150 Y150 F6000 ; move probe to center of bed
G30 ; probe for Z0

Same for homez.

[Citystars]

@Phaedrux said in RRF 3 with piezo z probe not working:

G1 X150 Y150 F6000 ; move probe to center of bed G30 ; probe for Z0

Thank you the homing works now.
I still have one question.

Would this homing homingall.g be allright?

G91 				; use relative positioning
 
G1 H2 X0.5 Y-0.5 F10000	; energise motors to ensure they are not stalled
 
M400 				; make sure everything has stopped before we change the motor currents
M913 X20 Y20 		; drop motor currents to 25%
 
G1 H2 Z3 F5000		; lift Z 3mm
G1 H1 X-400 F3000 	; move left 400mm, stopping at the endstop
G1 H1 Y-400 F3000   ; move left 400mm, stopping at the endstop
G92 X0 Y0           ; set position x and y
G1 X3 F300          ; move away from the endstops
G1 Y3 F300          ; move away from the endstops
G1 H1 X-10          ; fine home X
G1 H1 Y-10          ; fine home X
G90 				; back to absolute positioning
G92 X0 Y0           ; set position x and y
G1 X25 Y25 F300     ; go to position
G92 X0 Y0           ; set position x and y
M400 				; make sure everything has stopped before we reset the motor currents
M913 X100 Y100 		; motor currents back to 100%
 
G91 				; use relative positioning
G1 X150 Y150 F6000  ; move probe to center of bed
G30 				; probe for Z0
G90					; back to absolute positioning
G1 X0 Y0 F1000		; Park
G1 Z0 F200          ; Park

Thank you

[Phaedrux]

@Citystars said in RRF 3 with piezo z probe not working:

G91 ; use relative positioning G1 X150 Y150 F6000 ; move probe to center of bed

I'd probably make that an absolute move and adjust it so that the probe is actually centered.