Example of config.g file for cartesian printer using npn z probe



  • Hello, I'm having some difficulty getting the configuration right for my z probe (npn). I've read through the wiki a few times but I feel like I have something mixed up in the config.g file. I was hoping somebody with a similar setup could possibly post a copy of their configuration file here so I know which order and section to put the commands that I want to use. I realize this kind of question has come up a lot lately so my apologies if this has been covered or there are examples listed somewhere else. I know there was an example on the wiki but I'm almost sure that would be using the smart ir probe and not the inductive style that I'm using.

    I did check out this page https://duet3d.com/wiki/Configuring_RepRapFirmware_for_a_Cartesian_printer but I just wanted to see someones full working config.g file.



  • You can post your config.g file here and tell us the problem you are having so we can troubleshoot it together.



  • ; Prusa i3 config file for dc42 Duet firmware

    ; Prologue and comms section
    M111 S0 ; Debug off
    M550 Pkprinter ; Machine name (can be anything you like)
    M551 Preprap ; Machine password
    ;*** 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
    ;*** Adjust the IP address and gateway in the following 2 lines to suit your network
    M552 P0.0.0.0 ; IP address (0 = use DHCP)
    M554 P192.168.1.1 ; Gateway
    M553 P255.255.255.0 ; Netmask
    M555 P2 ; Set output to look like Marlin
    M575 P1 B57600 S1 ; Comms parameters for PanelDue

    ; Movement section
    M569 P0 S1 ; Drive 0 goes forwards (change to S0 to reverse it)
    M569 P1 S0 ; Drive 1 goes forwards
    M569 P2 S0 ; Drive 2 goes forwards
    M569 P3 S0 ; Drive 3 goes forwards
    M569 P4 S1 ; Drive 4 goes forwards
    M574 X1 Y1 Z1 S1 ; set endstop configuration (X and Y endstops only, at low end, active high)
    M906 X800 Y800 Z800 E1000 ; Set motor currents (mA)
    M201 X800 Y800 Z15 E1000 ; Accelerations (mm/s^2)
    M203 X6000 Y6000 Z100 E3600 ; Maximum speeds (mm/min)
    M566 X30 Y30 Z30 E20 ; Minimum speeds mm/minute
    M208 X300 Y300 Z300 ; set axis maxima (adjust to suit your machine)
    M208 X0 Y0 Z-0.1 S1 ; set axis minimum (adjust to make X=0 and Y=0 the edge of the bed)
    M92 X400 Y400 Z400 ; Set axis steps/mm
    M92 E420:420 ; Set extruder steps per mm
    G21 ; Work in millimetres
    G90 ; Send absolute coordinates…
    M83 ; ...but relative extruder moves

    ; Z probe section
    M558 P4 X0 Y0 Z1 H3 F200 T5000 I1 ; Smart IR Z probe, used for homing Z axis, dive height 3mm, probe speed 200mm/min, travel speed 5000mm/min
    G31 X11.0 Y0.5 Z1.20 P500 ; Set the probe height and threshold (put your own values here)

    ; 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 R4700 H0 L0 ; Put your own H and/or L values here to set the bed thermistor ADC correction
    M305 P1 R4700 H0 L0 ; Put your own H and/or L values here to set the first nozzle thermistor ADC correction
    M305 P2 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

    ; 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
    ;*** If you have a dual-nozzle build, un-comment the following 2 lines
    M563 P1 D1 H2 ; Define tool 1
    G10 P1 S0 R0 ; Set tool 1 operating and standby temperatures

    ; Bed probe section (not needed if you use a bed.g file)
    ;*** Adjust the XY coordinates in the following M557 commands to suit your build and the position of your Z probe
    ;M557 P0 X60 Y0 ; Four...
    ;M557 P1 X60 Y165 ; ...probe points...
    ;M557 P2 X200 Y165 ; ...for bed...
    ;M557 P3 X200 Y0 ; ...levelling
    ;M557 P4 X141 Y82.5 ; 5th probe point for levelling (un-comment this to get a 5th point at the centre of the bed)
    M557 X20:280 Y20:280 S20 ; define a grid covering the XY area indicated with the specified grid spacing

    ; Epilogue
    ;*** 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



  • this is the configuration I'm using. I have the z probe working now (I ended up having to rewire it and then it worked fine). now the only issue is the grid bed leveling. when I type in G29 or G31 it tells me grid has not been defined. I thought thats what M557 X20:280 Y20:280 S20 ; define a grid covering the XY area indicated with the specified grid spacing was for but maybe I have things in the wrong order?



  • Have you tried sending the M557 manually just before G29/G31?
    I am just guessing the M556 might have affected it.


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