mesh bed leveling issue



  • ok i am trying to get the run mesh compensation my printer is 220 x 220 and i have it were it homes in the middle .
    when i press the mesh compensation it starts in the middle of the bed and not the top left . what do i need to do to get it to move to the top left for mesh compensation ? no files on my sys for mesh .


    ; Configuration file for Duet WiFi (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.4 on Thu Jul 23 2020 14:47:56 GMT+0300 (Arabian Standard Time)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"Anet A8" ; set printer name

    ; Network
    M552 S1 ; enable network
    M586 P0 S1 ; enable HTTP
    M586 P1 S0 ; disable FTP
    M586 P2 S0 ; disable Telnet

    ; Drives
    M569 P0 S0 ; physical drive 0 goes backwards
    M569 P1 S1 ; physical drive 1 goes forwards
    M569 P2 S0 ; physical drive 2 goes backwards
    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 X100.00 Y100.00 Z400.00 E409.00 ; set steps per mm
    M566 X600.00 Y600.00 Z18.00 E300.00 ; set maximum instantaneous speed changes (mm/min)
    M203 X6000.00 Y6000.00 Z180.00 E6000.00 ; set maximum speeds (mm/min)
    M201 X1500.00 Y1500.00 Z100.00 E10000.00 ; set accelerations (mm/s^2)
    M906 X500 Y500 Z500 E800 I30 ; set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 X-13 Y-3 Z0 S1 ; set axis minima
    M208 X200 Y170 Z240 S0 ; set axis maxima

    ; Endstops
    M574 X1 S1 P"!xstop" ; configure active-low endstop for low end on X via pin xstop
    M574 Y1 S1 P"!ystop" ; configure active-low endstop for low end on Y via pin ystop
    ;M574 Z1 S1 P"!zstop" ; configure active-low endstop for low end on Z via pin zstop
    M574 Z0 ; configure Z-probe endstop on Z

    ; Z-Probe
    M950 S0 C"exp.heater3" ; create servo pin 0 for BLTouch
    M558 P9 C"^zprobe.in" H5 F120 T2000 ; set Z probe type to bltouch and the dive height + speeds
    G31 P500 X0 Y-40 Z2.5 ; set Z probe trigger value, offset and trigger height
    M557 X55:200 Y55:170 S60 ; define mesh grid

    ; Heaters
    M308 S0 P"bedtemp" Y"thermistor" T100000 B4725 C7.06e-8 ; 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 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
    M140 H0 ; map heated bed to heater 0
    M143 H0 S130 ; set temperature limit for heater 0 to 130C
    M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 ; 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

    ; 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
    M575 P1 S1 B57600 ; enable support for PanelDue
    T0 ; select first tool

    _________________________________________________________________________________________________________________________; homeall.g
    ; called to home all axes
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.4 on Thu Jul 23 2020 14:47:56 GMT+0300 (Arabian Standard Time)
    G91 ; relative positioning
    G1 H2 Z5 F6000 ; lift Z relative to current position
    G1 H1 X-258 Y-235 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
    G1 H2 X5 Y5 F6000 ; go back a few mm
    G1 H1 X-258 Y-235 F360 ; move slowly to X and Y axis endstops once more (second pass)
    ;G1 H1 Z-245 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)
    G1 X114 Y83 F4000 ; Move probe to middle of bed
    G30
    ; Uncomment the following lines to lift Z after probing
    ;G91 ; relative positioning
    ;G1 Z5 F100 ; lift Z relative to current position
    ;G90 ; absolute positioning




  • @morf33 said in mesh bed leveling issue:

    my printer is 220 x 220 and i have it were it homes in the middle .

    ; Axis Limits
    M208 X-13 Y-3 Z0 S1 ; set axis minima
    M208 X200 Y170 Z240 S0 ; set axis maxima

    Hi,

    What do you mean by "homes in the middle"?

    Thanks.

    Frederick



  • when you do autohome when it goes thru to do the endstops it will center on the center of the bed after it does the z probe of the bed . when i click mesh it starts in the middle of the bed . how do i get it to start at the corner like it should



  • @morf33

    We need to see the code that is executed with you are probing the bed.

    Frederick



  • were would that info be what files do i need to post ?its the drop down menu for the mesh compensation.



  • @morf33 said in mesh bed leveling issue:

    were would that info be what files do i need to post ?its the drop down menu for the mesh compensation.

    Here is something to get you started. It's not exactly the way I do it but it works.

    https://duet3d.dozuki.com/Wiki/Using_mesh_bed_compensation

    Frederick


  • Moderator

    Do you have a bed.g file? That may ultimately be what you're running from the drop down.



  • this is in the bed g file
    ; bed.g
    ; called to perform automatic bed compensation via G32
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.4 on Thu Jul 23 2020 14:47:56 GMT+0300 (Arabian Standard Time)
    M561 ; clear any bed transform
    G29 ; probe the bed and enable compensation


  • Moderator

    Where are the endstops physically located?
    Does -X move to the left, +X to the right?
    Does -Y move the nozzle to the front of the bed and +Y to the back?
    Is the Y axis really only 170mm long and the X is 200mm?



  • oki set it to 170 becasue it would try to keep going but i now find out that the y is moving more than it should
    10mm is 13mm when it moves so i need to adjust the steps ?


  • Moderator

    @morf33 said in mesh bed leveling issue:

    M92 X100.00 Y100.00 Z400.00 E409.00 ; set steps per mm

    You'd have to do the calculation knowing your belt tooth pitch and pulley tooth count as well as stepper resolution and microstepping, but I think your correct steps for X and Y is actually 80.

    xy_steps_per_mm = (motor_steps_per_rev ∗ driver_microstep) / (belt_pitch ∗ pulley_number_of_teeth)
    

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