Auto bed compensation hits the wall

32034

Hello.

Thank you for a wonderful hardware and software! I have already printed at least 100 parts.
With that said
I have never managed to use Auto bed compensation. When I press the button, the printer head runs towards the first point, and beyond into the printer wall. It does not stop at the coordinates G30 P0 X70 Y15 Z-99999 that I have set for the first point in bed.g. I have tried to change the coordinates for the first point, but it runs to the X0 Y0 corner and keeps banging the wall until I hit Emergency stop.

Before Auto bed compensation, I have run home all, with working x and y endstops. So I would expect the printer knows where it is before auto .

Any clues?

Regards

Edit: Header

dc42

That sounds odd. Please post your config.g and bed.g files.

Which firmware version are you running? What happens if you send that G30 command manually?

32034

Here is more info.
Running G30 P0 X70 Y15 Z-99999 in G-console sends the printer head in to the wall in the X0 Y0 corner.
I am controlling the printer via the web page, not the via Paneldue.

Current firmware```
[[language]]
Firmware Name: RepRapFirmware for Duet WiFi
Firmware Electronics: Duet WiFi 1.0
Firmware Version: 1.16 (2016-11-08)
WiFi Server Version: 1.03 (ch fork)
Web Interface Version: 1.13

config.g

[[language]]
; Configuration file for BigBox 3D printer
;- Communication and general
M111 S0 ; Debug off
M550 BigBox ; Machine name and Netbios name (can be anything you like)
M551 Preprap ; Machine password (used for FTP)
M540 P0xBE:0xEF:0xDE:0xAD:0xFE:0xED ; MAC Address

;- Wifi Networking
M552 S1 ; Enable WiFi
M555 P2 ; Set output to look like Marlin

;- Movement section
M569 P0 S1 ; Drive 0 goes forwards (change to S0 to reverse it)
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M569 P4 S1 ; Drive 4 goes forwards
M574 X1 Y1 Z1.2 S1 ; set endstop configuration (X and Y endstops only, at low end, active high)
M906 X800 Y700 Z700 E500:500 I30 ; Set motor currents (mA) and motor idle factor in per cent
M201 X800 Y800 Z15 E1000 ; Accelerations (mm/s^2)
M203 X15000 Y15000 Z200 E3600 ; Maximum speeds (mm/min)
M566 X600 Y600 Z30 E20 ; Minimum speeds mm/minute
M208 X300 Y240 Z300 ; set axis maxima (adjust to suit your machine)
M208 X0 Y0 Z-0.0 S1 ; set axis minimum (adjust to make X=0 and Y=0 the edge of the bed) --M208 X0 Y0 Z-0.2 S1
M92 X160 Y360 Z1600 ; Set axis steps/mm
M92 E417.5:417.5 ; Set extruder steps per mm
G21 ; Work in millimetres
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves
M350 X16 Y16 E16 I1 ; Set 16x microstepping with interpolation
M84 S60 ;Stop idle hold. Set stepper idle timeout in sec

;-Z probe section
M558 P1 X0 Y0 Z1 H3 F200 T5000 ; Smart IR Z probe, used for homing Z axis, dive height 3mm, probe speed 200mm/min, travel speed 5000mm/min
G31 P500 X140.0 Y150.0 Z1.05 ; Set the probe height and threshold; increase Z to decrease bed probe distance ;Z1.48

;-Heater and thermistor section--;- If you have a Duet board with 1K thermistor series resistors, change R4700 to R1000 to the following M305 commands
M305 P0 T100000 B4388 R4700 H0 L0 ; Put your own H and/or L values here to set the bed thermistor ADC correction
M305 P1 T100000 X200 ;B4388 R4700 H0 L0 ; Put your own H and/or L values here to set the first nozzle thermistor ADC correction
M305 P2 T100000 X201 ;B4388 R4700 H0 L0 ; Put your own H and/or L values here to set the second nozzle thermistor ADC correction

M307 H0 A134.6 C406.4 D4.4 B0 ; PID settings for bed
M307 H1 A312.6 C145.8 D8.8 B0 ; PID settings for extruder 0
M307 H2 A216.4 C98.6 D5.8 B0 ; PID settings for extruder 1
M570 S120 ; Increase to allow extra heating time if needed

;-Fans
M106 P0 F10 ; Fix for Bigbox Blower
;M106 P0 S0.3 I0 F500 H-1
M106 P1 T70 H1
M106 P2 T70 H2

;-Tool definition section
M563 P0 D0 H1 ; Define tool 0 to use extruder drive 0 and heater 1
G10 P0 S0 R0 ; Set tool 0 operating and standby temperatures
M563 P1 D1 H2 ; Define tool 1
G10 P1 S0 R0 ; Set tool 1 operating and standby temperatures

T0 ; select first hot end


bed.g```
[[language]]
M561						; clear any bed transform, otherwise homing may be at the wrong height
;G30 P0 X120 Y50 Z-99999 ;test
G30 P0 X70 Y15 Z-99999       ; define  points in a clockwise direction around the bed, starting near (0,0)
G30 P1 X70 Y190 Z-99999
G30 P2 X295 Y190 Z-99999
G30 P3 X295 Y15 Z-99999  	
G30 P4 X140 Y100 Z-99999 S  ; finally probe bed centre, and calculate compensation  (S0 or just S??)

dc42

This line in config.g is the problem:

G31 P500 X140.0 Y150.0 Z1.05 ; Set the probe height and threshold; increase Z to decrease bed probe distance ;Z1.48

It says that your Z probe is offset from the nozzle by 140mm in the X direction and 150mm in the Y direction. That can't be right.

32034

Changed to G31 P500 X0.0 Y0.0 Z1.05 and now it is running as supposed. I do have to put down the bottle…

And I should change to S4 at the end of bed.g to save the calculation?

dc42

S or S0 means default, which in your case will be S5 i.e. use all 5 points.