Z-stepping to short?

  • I don't think my Z is advancing as fast as I need it to.

    Is there a way I can config it to keep up?

  • administrators

    Have you set the Z steps per mm correctly?

  • That seems not a steps/mm Issue cause the X is clearly readable. Only a gap betwwen ~ Lyer 10 and the next (or is this a brim?)and the Rest above. Seems more a mechanical issue. Cause wrong steps will be noticeable everywhere and the X will not as clear as this one.

  • During the print I kept having to add baby z-steps so it would not damage my hotend by it running back into the print

  • administrators

    If the problem is not consistent enough to be incorrect steps/mm then I think it's either a mechanical issue or caused by your Z acceleration or Z maximum speed being settling high.

  • It starts after the first layer is down then it just gets worse after that.

  • Here is my config I have matched to a few on this forum and I think I got it right.

    ; CoreXY sample config file for dc42 Duet firmware

    M111 S0 ; Debug off
    M550 PBig-D ; Machine name (can be anything you like)
    M551 Preprap ; Machine password (used for FTP connections)
    ;*** If you have more than one Duet on your network, they must all have different MAC addresses, so change the last digits
    M540 P0xBE:0xEF:0xDE:0xAD:0xFE:0xED ; MAC Address
    ;*** Wifi Networking
    M552 S1 ; Enable WiFi

    M555 P2 ; Set output to look like Marlin
    ;M575 P1 B57600 S1 ; Comms parameters for PanelDue

    ; Machine configuration
    M569 P0 S0 ; Drive 0 goes forwards (change to S0 to reverse it)
    M569 P1 S1 ; Drive 1 goes forwards
    M569 P2 S0 ; Drive 2 goes forwards
    M569 P3 S1 ; Drive 3 goes forwards
    M569 P4 S1 ; Drive 4 goes forwards
    ; If you use an endstop switch for Z homing, change Z0 to Z1 in the following line, and see also M558 command later in this file
    M574 X1 Y2 Z1 S0 ; set endstop configuration (X and Y and endstops only, at low end, active high)
    M667 S1 ; set CoreXY mode
    M350 X64 Y64 Z64 E64 I0 ; Set 16x microstepping with interpolation
    M92 X400 Y400 Z1600 ; Set axis steps/mm
    M92 E1643:1643 ; Set extruder steps/mm
    M584 E4
    M906 X800 Y800 Z800 E1400 ; Set motor currents (mA)
    M201 X1000 Y1000 Z300 E4000 ; Accelerations (mm/s^2)
    M203 X15000 Y15000 Z500 E1500 ; Maximum speeds (mm/min)
    M566 X800 Y800 Z24 E1200 ; Maximum jerk speeds mm/minute
    M208 X290 Y285 Z320 ; set axis maxima (adjust to suit your machine)
    M208 X-10 Y0 S1 ; set axis minima (adjust to make X=0 and Y=0 the edges of the bed)
    G21 ; Work in millimetres
    G90 ; Send absolute coordinates…
    M83 ; ...but relative extruder moves

    ; Z probe
    M558 P1 X0 Y0 Z0 ; Analog Z probe, also used for homing the Z axis
    ;G31 Z2.47 P500 S1 ; Set the probe height and threshold (put your own values here)
    ; The following M557 commands are not needed if you are using a bed.g file to perform bed compensation
    ;*** Adjust the XY coordinates in the following M557 commands to suit your build and the position of the Z probe
    ;M557 P0 X30 Y25 ; Four...
    ;M557 P1 X30 Y155 ; ...probe points...
    ;M557 P2 X250 Y125 ; ...for bed...
    ;M557 P3 X250 Y25 ; ...levelling
    ;M557 P4 X150 Y95 ; 5th probe point for levelling

    ; Thermistors and heaters
    ;*** You can use S and B parameters to define the parameters of the thermistors you are using
    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 B4388 R4700 H0 L0 ; Put your own H and/or L values here to set the first nozzle thermistor ADC correction
    M305 P2 T100000 B3974 R4700 H0 L0 ; Put your own H and/or L values here to set the second nozzle thermistor ADC correction
    M301 H1 P10 I0.10 D100 T0.50 S1.0 ; PID settings for extruder 0
    M301 H2 P10 I0.10 D100 T0.50 S1.0 ; PID settings for extruder 1
    M570 S120 ; Increase to allow extra heating time if needed
    M307 H0 A86.7 C612.7 D6.0 B0
    M307 H1 A406.3 C166.4 D10.3 B0

    ; Fans
    M106 P0 T50 H1
    M106 P1 T50 H1
    M106 P2 T50 H1

    ; Tool definition
    M563 P0 D0 H1 ; Define tool 0
    G10 P0 S0 R0 ; Set tool 0 operating and standby temperatures
    ;*** If you have a dual-nozzle build, un-comment the following 3 lines
    ;M563 P1 D1 H2 ; Define tool 1
    ;G10 P1 S0 R0 ; Set tool 1 operating and standby temperatures

    ;*** If you are using axis compensation, put the figures in the following command
    M556 S78 X0 Y0 Z0 ; Axis compensation here
    T0 ; select first hot end


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