Dual Z problem with Version 1.21

  • I got a problem with my printer after updating to 1.21.
    i have dual z and after the update its look like one motor is slower then the other.
    its the same if i home or do G1 Z10 S2.
    i cant even downgrad back to 1.20 😕
    could someone help me?

    here my config.g

    ; Configuration file for Duet WiFi (firmware version 1.17)
    ; executed by the firmware on start-up
    ; generated by RepRapFirmware Configuration Tool on Fri Jun 16 2017 18:06:21 GMT+0200 (Mitteleuropäische Sommerzeit)
    ;M307 H2 A-1 C-1 D-1
    ; General preferences
    M111 S0                         ; Debugging off
    G21                             ; Work in millimetres
    G90                             ; Send absolute coordinates...
    M83                             ; ...but relative extruder moves
    M555 P2                         ; Set firmware compatibility to look like Marlin
    M208 X0 Y0 Z0 S1                    ; Set axis minima
    M208 X250 Y250 Z250 S0                     ; Set axis maxima
    ; Endstops
    M574 X1 Y1 Z0 S0 ; Define active low and unused microswitches
    M558 P5 X0 Y0 Z1 H2 F1000 T6000             ; Set Z probe type to unmodulated, the axes for which it is used and the probe + travel speeds
    G31 X0.0 Y0.0 Z0.9 P600                    ; Set Z probe trigger value, offset and trigger height
    ; Drives
    M569 P0 S1                         ; Drive 0 goes forwards
    M569 P1 S1                         ; Drive 1 goes forwards
    M569 P2 S0                         ; Drive 2 goes forwards
    M569 P3 S1                         ; Drive 3 goes forwards
    M569 P4 S0                        ; Drive 4 goes forwards
    ; Motor remapping for dual Z
    M584 X0 Y1 Z2:4
    M671 X-15:260 Y127:127 S5
    M350 X64 Y64 Z64:64 E16 I1                 ; Configure microstepping with interpolation
    M92 X320 Y320 Z1600:1600 E418.5                ; Set steps per mm
    M566 X600 Y600 Z16:16 E120                 ; Set maximum instantaneous speed changes (mm/min)
    M203 X7200 Y7200 Z100:100 E1200                 ; Set maximum speeds (mm/min)
    M201 X3200 Y3200 Z50:50 E200                 ; Set accelerations (mm/s^2)
    M906 X1000 Y1000 Z800:800 E900 I30             ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30                         ; Set idle timeout
    ; Heaters
    M143 S270                         ; Set maximum heater temperature to 270C
    M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30         ; Use PID on bed heater (may require further tuning)
    M305 P0 R4700 T100000 B3950                ; Bed thermistor (P0) is 100K @ room temp
    M305 P1 R4700 T100000 B4388                 ; Set thermistor + ADC parameters for heater 0
    ; Tools
    M563 P0 D0 H1                         ; 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
    ; Network
    M550 PPrusa-I3                         ; Set machine name
    M552 S1                         ; Enable network
    M587 S"FRITZ!Box Fon WLAN 7390" P"xxxxxxx"; Configure access point and IP addresses. You can delete this line once connected
    M586 P0 S1                         ; Enable HTTP
    M586 P1 S0                         ; Disable FTP
    M586 P2 S0                         ; Disable Telnet
    ; Fans
    ;M106 P1 S1.00 T60 H1 F100
    ;M106 P0 S0.3 I0 F500 H-1                 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P1 S1 I0 F500 H1 T70                 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
    ;M106 P2 S1 I0 F500 H1                  ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

  • administrators

    To downgrade to 1.20, rename the 1.20 version of DuetWiFiFirmware.bin or DuetEthernetFirmware.bin (as appropriate to your Duet) to Duet2CombinedFirmware.bin, and upload it in the usual way.

    Please downgrade and tell us whether that resolved the problem.

    btw in your M350, M92, M201, M203. M566 and M906 commands you don't need to give the Z value twice, because both drivers automatically use the same values.

  • a downgrade to 1.20 worked and the z axis works perfect 🙂
    thank you

  • administrators

    Thanks. Please describe the exact problem that you were getting with firmware 1.21.

  • the problem after updating to 1.21 was that the 2 z screws didnt move synchron,its looked like the motor on the z connect was half as fast like the motor on e1

  • I would love to upgrade to 1.21 but is this problem solved or was it a configuration problem?

  • I had the same problem on 1.19 check this : - setting > machine properties > drive 2 and 4 and see if they have to same figures.
    For some reason it set drives 2 and 3 identical and set drive 4 to the extruder settings , so to get around it by making the Z motors 2 and 3 .

  • I only see X,Y,Z and E0 no other drives , not as numbers. I have this in my config
    M584 X0 Y1 Z2:4 ;driver 0=x;1=y,2+4=z
    and that works in 1.20

  • AlexLin:
    I'm running the exact same motor/drive/axis combination as you.
    And I'm having no problems with 1.21.

  • administrators

    The problem is that in your M584 command you didn't list the new extruder driver numbers. See the GCodes wiki page.

  • OK got it.Now it works…....so that should havebeen a problem in 1.20 too?

  • administrators

    Yes it should, so I don't know why you didn't have that problem before.


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