Manual Bed Leveling Assistant huge values returned



  • Hey there,

    I believe I have my Duet set up properly for using the Manual Bed Leveling Assistant, but I get ridiculously high values return from its output:

    Manual corrections required: 0.00 turn up (0.00mm) 3743725.00 turn down (1871862.50mm) 3743724.75 turn down (1871862.38mm) 3743724.00 turn down (1871862.00mm)
    

    Here is my config.g:

    ; Configuration file for Duet WiFi (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.9 on Sat Dec 05 2020 14:37:53 GMT-0800 (Pacific Standard Time)
    
    ; General preferences
    G90                                            ; send absolute coordinates...
    M83                                            ; ...but relative extruder moves
    M550 P"BD-HEVO"                                ; set printer name
    M669 K1                                        ; select CoreXY mode
    
    ; Network
    M552 P192.168.0.69 S1                          ; enable network and set IP address
    M553 P255.255.255.0                            ; set netmask
    M554 P192.168.0.1                              ; set gateway
    M586 P0 S1                                     ; enable HTTP
    M586 P1 S0                                     ; disable FTP
    M586 P2 S0                                     ; disable Telnet
    
    ; Drives
    M569 P0 S1                                     ; physical drive 0 goes forwards
    M569 P1 S1                                     ; physical drive 1 goes forwards
    M569 P2 S1                                     ; physical drive 2 goes forwards
    M569 P3 S1                                     ; physical drive 3 goes forwards
    M584 X0 Y1 Z2 E3                               ; set drive mapping
    M350 X16 Y16 Z16 E16 I1                        ; configure microstepping with interpolation
    M92 X80.00 Y80.00 Z400.00 E409.00              ; set steps per mm
    M566 X900.00 Y900.00 Z60.00 E120.00            ; set maximum instantaneous speed changes (mm/min)
    M203 X6000.00 Y6000.00 Z300.00 E1200.00        ; set maximum speeds (mm/min)
    M201 X500.00 Y500.00 Z20.00 E250.00            ; set accelerations (mm/s^2)
    M906 X800 Y800 Z800 E800 I30                   ; set motor currents (mA) and motor idle factor in per cent
    M84 S30                                        ; Set idle timeout
    
    ; Axis Limits
    M208 X0 Y0 Z0 S1                               ; set axis minima
    M208 X265 Y280 Z410 S0                         ; set axis maxima
    
    ; Endstops
    M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
    M574 Y1 S1 P"ystop"                            ; configure active-high endstop for low end on Y via pin ystop
    M574 Z1 S2                                     ; configure Z-probe endstop for low end on Z
    
    ; Z-Probe
    M558 P5 C"^!zprobe.in" I0 H5 F120 T6000        ; set Z probe type to switch and the dive height + speeds
    G31 P500 X-25.914 Y-53.86 Z0.882               ; set Z probe trigger value, offset and trigger height
    M557 X26:239 Y54:226 S20                         ; define mesh grid
    M671 X26:26:239:239 Y54:226:226:54 P0.5          ; point1 (26,54), point2 (26,226), point3 (239,226), point4 (239,54)
    
    ; Heaters
    M308 S0 P"bedtemp" Y"thermistor" T100000 B3950 ; configure sensor 0 as thermistor on pin bedtemp
    M950 H0 C"bedheat" T0                          ; create bed heater output on bedheat and map it to sensor 0
    M307 H0 B0 S0.90                               ; disable bang-bang mode for the bed heater and set PWM limit
    M140 H0                                        ; map heated bed to heater 0
    M143 H0 S100                                   ; set temperature limit for heater 0 to 100C
    M308 S1 P"e0temp" Y"thermistor" T100000 B4138  ; configure sensor 1 as thermistor on pin e0temp
    M950 H1 C"e0heat" T1                           ; create nozzle heater output on e0heat and map it to sensor 1
    M307 H1 B0 S1.00                               ; disable bang-bang mode for heater  and set PWM limit
    M143 H1 S280                                   ; set temperature limit for heater 1 to 280C
    
    ; Fans
    M950 F0 C"fan0" Q500                           ; create fan 0 on pin fan0 and set its frequency
    M106 P0 S0 H-1                                 ; set fan 0 value. Thermostatic control is turned off
    M950 F1 C"fan1" Q500                           ; create fan 1 on pin fan1 and set its frequency
    M106 P1 S1 H1 T45                              ; set fan 1 value. Thermostatic control is turned on
    
    ; Tools
    M563 P0 D0 H1 F0                               ; define tool 0
    G10 P0 X0 Y0 Z0                                ; set tool 0 axis offsets
    G10 P0 R0 S0                                   ; set initial tool 0 active and standby temperatures to 0C
    
    ; Custom settings are not defined
    
    ; Miscellaneous
    M501                                           ; load saved parameters from non-volatile memory
    T0                                             ; select first tool
    

    And my bed.g file:

    ; bed.g
    ; called to perform automatic bed compensation via G32
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.9 on Sat Dec 05 2020 14:37:53 GMT-0800 (Pacific Standard Time)
    ;M561 ; clear any bed transform
    ;G29  ; probe the bed and enable compensation
    
    G28 ; home
    ;G0 X0 Y0
    G30 P0 X26 Y226 Z-99999 ; probe near an adjusting screw
    G30 P1 X26 Y226 Z-99999 ; probe near an adjusting screw
    G30 P2 X239 Y226 Z-99999 ; probe near an adjusting screw
    G30 P3 X239 Y54 Z-99999 S4; probe near an adjusting screw and report adjustments needed
    G28 ; home
    
    

    Any help is greatly appreciated.



  • What does your height map look like ?



  • I have not created a height map yet. I am trying to set up my Capacitive NPN switch and the suggested steps include to first manually level the bed. I have done that by hand, now I wanted to get the Manual Bed Leveling Assistant working so I can dial in the bed level as best as possible before creating that height map.

    Do I have the steps wrong?



  • @bdelia

    just run a G29 and look at the image. it will help



  • @Veti said in Manual Bed Leveling Assistant huge values returned:

    @bdelia

    just run a G29 and look at the image. it will help

    Ok, will do once I get back home. Thanks for the assistance in this.



  • Probing twice the same point?

    G30 P0 X26 Y226 Z-99999 ; probe near an adjusting screw
    G30 P1 X26 Y226 Z-99999 ; probe near an adjusting screw
    

  • Moderator

    @bdelia said in Manual Bed Leveling Assistant huge values returned:

    G28 ; home

    What is in your homeall?



  • @BoA said in Manual Bed Leveling Assistant huge values returned:

    Probing twice the same point?

    G30 P0 X26 Y226 Z-99999 ; probe near an adjusting screw
    G30 P1 X26 Y226 Z-99999 ; probe near an adjusting screw
    

    Well that explains the double tap on that corner 😉 Thanks for the proofreading!



  • @Phaedrux said in Manual Bed Leveling Assistant huge values returned:

    @bdelia said in Manual Bed Leveling Assistant huge values returned:

    G28 ; home

    What is in your homeall?

    Here is my homeall

    ; homeall.g
    ; called to home all axes
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.9 on Sat Dec 05 2020 14:37:53 GMT-0800 (Pacific Standard Time)
    G91                     ; relative positioning
    G1 H2 Z5 F6000          ; lift Z relative to current position
    G1 H1 X-270 Y-295 F1800 ; move quickly to X or Y endstop and stop there (first pass)
    G1 H1 X-270             ; home X axis
    G1 H1 Y-295             ; home Y axis
    G1 X5 Y5 F6000          ; go back a few mm
    G1 H1 X-270 F360        ; move slowly to X axis endstop once more (second pass)
    G1 H1 Y-295             ; then move slowly to Y axis endstop
    G90                     ; absolute positioning
    G1 X25.914 Y53.86 F6000 ; go to first bed probe point and home Z
    G30                     ; home Z by probing the bed
    
    ; Uncomment the following lines to lift Z after probing
    ;G91                    ; relative positioning
    ;G1 Z5 F100             ; lift Z relative to current position
    ;G90                    ; absolute positioning
    
    


  • Ok, first off I want to thank this community for always being willing to help out.

    I think probing that one point twice that @BoA pointed out was the issue. I updated my bed.g file and all seems good now.


  • Moderator

    @bdelia said in Manual Bed Leveling Assistant huge values returned:

    ;M561 ; clear any bed transform

    You may want to uncomment this, because you would want any mesh compensation or other bed surface alterations to be canceled when doing the leveling.



  • @Phaedrux said in Manual Bed Leveling Assistant huge values returned:

    @bdelia said in Manual Bed Leveling Assistant huge values returned:

    ;M561 ; clear any bed transform

    You may want to uncomment this, because you would want any mesh compensation or other bed surface alterations to be canceled when doing the leveling.

    Thanks for the tip


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