Commissioning woes, cannot Home All



  • Hi all, first post.

    EDIT I think I fixed my problem, see my fifth post, but I'll leave this here for educational purposes.

    I am well into the commissioning for my Rostock Max V2 upgrade to DuetWifi, IR Probe, 24V Meanwell 600W PSU and other changes. Duet Firmware is 1.17, Web Interface is 1.14b4, WiFi Server version is 1.03.

    Last night I finally started playing with the upgraded printer, I had Auto Calibration working, though I hadn't conducted a test print.

    As of this morning Auto Calibration is back to timing out as the printer attempts to probe the air a few centimetres above the bed. After failing to get a Z probe trigger seven times there is an AJAX error and I have to reset the board before I can reconnect. I have checked my delta radius and printable radius along with the endstop heights in config.bin, they seem fine, and unchanged from when I had Auto Calibration working last night. I have tried this with the hot end and bed both at print temperature and cold. Same result. Both worked yesterday.

    In my attepmts to diagnose this and fix it I would like to manually check Z=0 height, but now when I attempt to Home All so that I can take manual control of the printer, I get AJAX errors and have to restart the printer. The Duet Wifi does not seem to be resetting, if I have the hot end and bed at set temperatures the Duet will go on maintaining those until I reset the board., it just won't talk to me via the browser.

    What seems odd to me is that Auto Calibration, even though it now fails to reach the bed, Homes All as part of its script without resulting in AJAX errors, so I don't think there's an issue with the tower endstop switches or their wiring.


    Error after attempting Auto Calibration.


    The board while web interface is unresponsive. The correct LEDs seem to be lit to me? Certainly temperature/fan control is continuing.

    Any advice would be appreciated.



  • Can you also post your config? It sounds like there is a problem somewhere that is causing the board to get stuck trying to do something it shouldnt. I'm not a delta person but without the config no one will be able to really help



  • ; Configuration file for Mini Kossel kit from Think3DPrint3D for testing Duet WiFi, modified for Rostock max V2

    ; Communication and general
    M111 S0 ; Debug off
    M550 PRostock Max V2 test ; Machine name and Netbios name (can be anything you like)
    M551 Pduetwifi ; Machine password (used for FTP)
    ;*** 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

    G21 ; Work in millimetres
    G90 ; Send absolute coordinates…
    M83 ; ...but relative extruder moves

    ; Axis and motor configuration
    M569 P0 S1 ; Drive 0 goes forwards
    M569 P1 S0 ; Drive 1 (Y tower) goes backwards, IDK why this stepper was backwards after the upgrade.
    M569 P2 S1 ; Drive 2 goes forwards
    M569 P3 S1 ; Drive 3 goes forwards
    M569 P4 S1 ; Drive 4 goes forwards
    M574 X2 Y2 Z2 S1 ; set endstop configuration (all endstops at high end, active high)
    ;*** The homed height is deliberately set too high in the following - you will adjust it during calibration
    ;the below diagonal rod length was taken from the calibration instructions for the SeeMeCNC Rostock Max V2,
    ;delta and printable radii are my best guesses for the build plate
    M665 R144.2 L290.8 134.20 H379.2 ; set delta radius, diagonal rod length, printable radius and homed height
    M666 X0 Y0 Z0 ; put your endstop adjustments here, or let auto calibration find them
    M350 X16 Y16 E16 I1 ; Set 16x microstepping with interpolation
    M92 X80 Y80 Z80 ; Set axis steps/mm
    M906 X1000 Y1000 Z1000 E800 I60 ; Set motor currents (mA) and increase idle current to 60%
    M201 X1000 Y1000 Z1000 E1000 ; Accelerations (mm/s^2)
    M203 X20000 Y20000 Z20000 E3600 ; Maximum speeds (mm/min)
    M566 X1200 Y1200 Z1200 E1200 ; Maximum instant speed changes mm/minute

    ; Thermistors
    M305 P0 T100000 B3950 R4700 H30 L0 ; Put your own H and/or L values here to set the bed thermistor ADC correction
    M305 P1 X200 T100000 B3974 R4700 H30 L0 ; PT100 sensor, Put your own H and/or L values here to set the first nozzle thermistor ADC correction
    M305 P2 T100000 B3974 R4700 H30 L0 ; Put your own H and/or L values here to set the second nozzle thermistor ADC correction
    M570 S180 ; Hot end may be a little slow to heat up so allow it 180 seconds

    ; Fans
    M106 P1 T45 H1 ; Fan 1 (and LED ring) is Thermostatically controlled, set to 45C
    M106 P0 H-1 ; Fan 0 (24V blower) is non-Thermostatically controlled

    ; Tool definitions
    M563 P0 D0 H1 ; Define tool 0
    G10 P0 S0 R0 ; Set tool 0 operating and standby temperatures
    ;*** If you have a single-nozzle build, comment the next 2 lines
    ;M563 P1 D1 H2 ; Define tool 1
    ;G10 P1 S0 R0 ; Set tool 1 operating and standby temperatures
    M92 E663:663 ; Set extruder steps per mm

    ; Z probe and compensation definition
    ;*** If you have a switch instead of an IR probe, change P1 to P4 in the following M558 command
    M558 P1 X0 Y0 Z0 ; Z probe is an IR probe and is not used for homing any axes
    G31 X0 Y0 Z0.9 P500 ; Set the zprobe height and threshold (put your own values here)

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

    M208 S1 Z-0.2 ; set minimum Z
    ;
    T0 ; select first hot end



  • My calibration bed.g:
    (Note that I have not modified any X or Y coordinates despite the fact that this is a Rostcok Max V2 bed, not a Mini Kossel)

    ; Auto calibration routine for delta printers
    ; Before running this, you should have set up your zprobe Z offset to suit your build, in the G31 command in config.g.

    M561 ; clear any bed transform, otherwise homing may be at the wrong height
    G31 X0 Y0 ; don't want any probe offset for this
    G28 ; home the printer

    ;*** Remove the following line if your Z probe does not need to be deployed

    ; The first time the mechanical probe is used after deployment, it gives slightly different results.
    ; So do an extra dummy probe here. The value stored gets overwritten later. You can remove this if you use an IR probe.

    ; Probe the bed and do 6- or 7-factor auto calibration
    G30 P0 X-73.6 Y-42.5 Z-99999 ; X tower
    G30 P1 X0 Y-85 Z-99999 ; between X and Y towers
    G30 P2 X73.6 Y-42.5 Z-99999 ; Y tower
    G30 P3 X73.6 Y20 Z-99999 ; between Y and Z towers
    G30 P4 X0 Y67 Z-99999 ; Z tower
    G30 P5 X-73.6 Y20 Z-99999 ; between Z and X towers
    G30 P6 X-36.8 Y-21.25 Z-99999 ; half way to X tower
    G30 P7 X36.8 Y-21.25 Z-99999 ; half way to Y tower
    G30 P8 X0 Y42.5 Z-99999 ; half way to Z tower
    G30 P9 X0 Y0 Z-99999 S6 ; centre, and auto-calibrate 6 factors

    ;*** Remove the following line if your Z probe does not need to be retracted

    G1 X0 Y0 Z150 F15000 ; get the head out of the way of the bed



  • ; Homing file for RepRapFirmware on Mini Kossel, modified for Rostock Max V2
    G91 ; use relative positioning
    ;******* Change F250 in the following line to F2500 when you are finished commissioning
    ;******* Change 320 in the following to a higher value if your Kossel has taller towers
    G1 S1 X380 Y380 Z380 F2500 ; move all carriages up 380mm, stopping at the endstops
    G1 S2 X-3 Y-3 Z-3 ; move all carriages down 3mm
    G1 S1 X6 Y6 Z6 F250 ; move carriages slowly up 6mm, stopping at the endstops
    G1 Z-5 F2000 ; down a few mm so that we can centre the head
    G90 ; back to absolute positioning
    G1 X0 Y0 F2000 ; centre the head and set a reasonable feed rate



  • OK, just found an error: I had deleted "B" from in front of the printable radius at the M665 config line. Fixed that, and now things are working again. Thanks for getting me to post my config, it prompted me to read it with fresh eyes somehow 🙂


  • administrators

    Cool, you spotted it before I did!



  • This firmware and hardware can work on so many different machines and a simple typo can make so much go wrong, that we have to have the config to even begin to diagnose anything. That being said, great job finding your problem before anyone else had a chance to 🙂

    I do have a delta with a 0.8.5 board but it sits unused 6 months out of the year probably… I'm thinking of decomissioning it to salvage the motors for a CNC Router 🙂 and move the 0.8.5 to one of my other printers


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