[solved] Duet Crash on probing

toshi

Hello everybody,

I just receive my board this morning and I wiring it on my smartalu this evening with more or less problems.
Every things seems to be properly connected, end stop and inductive prove recognize but I have a trouble with my bed auto leveling. When I launch it through the web interface, the printer move, home X, Y, probe 5 points and then crash …

Thanks a lot for your help,
Seb

with the error :

[[language]]
Communication Error

An AJAX error has been reported, so the current session has been terminated.

Please check if your printer is still on and try to connect again.

Error reason: SyntaxError: Unexpected token a in JSON at position 65

Here my bed.g

[[language]]
; Auto calibration routine for delta printers
; Before running this, you should have set up your zprobe Z offset to suit your build, in the G31 command in config.g.

M561						; clear any bed transform, otherwise homing may be at the wrong height
G31 X0 Y0					; don't want any probe offset for this
G28							; home the printer

;*** Remove the following line if your Z probe does not need to be deployed
;M98 Pdeployprobe.g			; deploy the mechanical Z probe

; The first time the mechanical probe is used after deployment, it gives slightly different results.
; So do an extra dummy probe here. The value stored gets overwritten later. You can remove this if you use an IR probe.
;G30 P0 X0 Y0 Z-99999

; Probe the bed and do 6- or 7-factor auto calibration
G30 P0 X15 Y15 Z-99999 H0			; X tower
G30 P1 X170 Y15	Z-99999 H0			; between X and Y towers
G30 P2 X170 Y170 Z-99999 H0			; Y tower
G30 P3 X15 Y170	Z-99999 H0			; between Y and Z towers
G30 P4 X90 Y90 Z-99999 S4			; Z tower

;*** Remove the following line if your Z probe does not need to be retracted
;M98 Pretractprobe.g				; retract the mechanical Z probe

G1 X10 Y10 Z10 F8000			; get the head out of the way of the bed

dc42

You need to probe clockwise around the bed, not anticlockwise. I've heard before that probing the wrong way causes problems, but I wasn't aware that it could cause the web interface to disconnect.

You may wish to use mesh bed levelling instead because it allows a much larger number of probe points. See https://duet3d.com/wiki/Using_mesh_bed_compensation.

toshi

Thanks a lot for your quick answer, now it works !