Z motor Issue during print



  • Started a print last night, and checked up on it a few times through the night. Came down this morning to find that the bed had moved all the way down to max and was the head was extruding still in mid air.

    After stopping and trying to rehome the printer, find out that the z-axis will not move.

    I got the following errors

    Warning: motor phase B may be disconnected reported by driver(s) 2

    and running M122 during homing of z-axis gave me

    Supply voltage: min 23.5, current 23.8, max 24.5, under voltage events: 0, over voltage events: 0, power good: yes
    Driver 0: standstill, SG min/max 0/132
    Driver 1: standstill, SG min/max not available
    Driver 2: open-load-B, SG min/max not available
    Driver 3: standstill, SG min/max not available
    Driver 4: standstill, SG min/max not available
    Date/time: 2019-11-25 07:06:46
    Cache data hit count 1766442894
    Slowest loop: 3.38ms; fastest: 0.07ms
    I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0

    I disconnected the z-axis inspected and all looked good. I then swapped each z motor out with the x-axis and homed the x-axis for each motor separately and motors worked just fine. What else could be the issue? I checked the connectors for the z-axis and I do not see any issues with any shorting there.



  • here is config.g as well

    ; General preferences
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves
    M575 P1 B38400 S1 ; Baudrate for Paneldue 38400
    M667 S1 ; Select CoreXY mode

    ; Network
    M550 P"My Printer" ; Set machine name
    M552 S1 ; Enable network
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

    ; Drives
    M569 P0 S1 ; X-Axis Drive 0 goes backwards
    M569 P1 S1 ; Y-Axis Drive 1 goes backwards
    M569 P2 S0 ; Z-Axis Drive 2 goes forwards
    M569 P3 S0 ; Extruder Drive 3 goes backwards
    M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
    M92 X81 Y81 Z404 E415 ; Set steps per mm
    M566 X600.00 Y600.00 Z100.00 E120.00 ; Set maximum instantaneous speed changes (mm/min)
    M203 X6000.00 Y6000.00 Z180.00 E1200.00 ; Set maximum speeds (mm/min)
    M201 X3000.00 Y3000.00 Z100.00 E250.00 ; Set accelerations (mm/s^2)
    M906 X1430.00 Y1430.00 Z1430.00 E1440 I35 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 X0 Y0 Z0 S1 ; Set axis minima
    M208 X330 Y330 Z415 S0 ; Set axis maxima

    ; Endstops
    M574 X1 Y1 S0 ; Set active low and disabled endstops
    M574 Z1 S2 ; Define Z to use Probe. Home to Min
    M558 P9 Z1 H5 F100 T2000 ; Set Z probe type/mode 9. H=Dive Height. F=Speed the bed moves
    G31 X-23 Y-2 Z2.67 P25 ; Z probe trigger value, offset in relation to nozzle. And trigger height adjustment

    ;MeshGrid
    M557 X50:300 Y50:300 S25 ; Define mesh grid
    M671 X50:50:300:300 Y50:300:300:50 P0.5 ; adjusting screws, thread pitch 0.5mm

    ; Heaters
    M307 H7 A-1 C-1 D-1 ; Disable the 7th Heater to free up PWM channel 5
    M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
    M143 H0 S120 ; Set temperature limit for heater 0 to 120C
    M305 P1 T100000 B4725 R4700 C7.06e-8 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S280 ; Set temperature limit for heater 1 to 280C
    M307 H1 A306.6 C114.2 D3.6 V23.8 S1 B0
    M570 H1 P10 T15 S15 ; Configure heater fault detection (H# heater number, P time in seconds for anomaly to persist, T temp
    excursion setpoint, S time in mins before print cancelled)

    ; Fans
    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 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on

    ; 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

    ; Automatic power saving
    M911 S21 R23 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss


  • administrators

    @jaurand said in Z motor Issue during print:

    Warning: motor phase B may be disconnected reported by driver(s) 2

    It's either bad crimp connection in one of the Z motor cables (which may be intermittent, so that it worked when you plugged it into X), or a faulty Z driver. Please try plugging the X and Y motor cables into the Z motor connectors, then try to move Z and see whether X and/or Y move. To move Z when nothing has been homed, first send G91, then send a G1 H2 Z move, for example G1 H2 Z100.



  • @dc42 alright plugged x and y into z slots and those are running just fine. Odd that a bad crimp showed up all of a sudden.


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