under voltage



  • under voltage message
    Resume state saved
    Print auto-paused due to low voltage

    Warning: VIN under-voltage event (9.2V)
    this is what i got after i did a M122

    M122
    === Diagnostics ===
    RepRapFirmware for Duet 2 WiFi/Ethernet version 2.03 running on Duet WiFi 1.02 or later
    Board ID: 08DGM-917DA-G4MS8-6JKDA-3SN6Q-TSV39
    Used output buffers: 1 of 24 (6 max)
    === RTOS ===
    Static ram: 25680
    Dynamic ram: 93780 of which 280 recycled
    Exception stack ram used: 628
    Never used ram: 10704
    Tasks: NETWORK(ready,660) HEAT(blocked,1236) MAIN(running,3820) IDLE(ready,160)
    Owned mutexes:
    === Platform ===
    Last reset 00:08:16 ago, cause: power up
    Last software reset time unknown, reason: User, spinning module GCodes, available RAM 10792 bytes (slot 3)
    Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0441f000 BFAR 0xe000ed38 SP 0xffffffff Task 0x4e49414d
    Error status: 0
    Free file entries: 10
    SD card 0 detected, interface speed: 20.0MBytes/sec
    SD card longest block write time: 0.0ms, max retries 0
    MCU temperature: min 31.4, current 35.6, max 36.6
    Supply voltage: min 12.0, current 12.1, max 12.2, under voltage events: 0, over voltage events: 0, power good: yes
    Driver 0: standstill, SG min/max 0/307
    Driver 1: standstill, SG min/max not available
    Driver 2: standstill, SG min/max not available
    Driver 3: standstill, SG min/max not available
    Driver 4: standstill, SG min/max not available
    Date/time: 2020-02-18 09:02:21
    Cache data hit count 1820081411
    Slowest loop: 3.99ms; fastest: 0.08ms
    I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
    === Move ===
    Hiccups: 0, FreeDm: 169, MinFreeDm: 166, MaxWait: 176ms
    Bed compensation in use: none, comp offset 0.000
    === DDARing ===
    Scheduled moves: 8, completed moves: 8, StepErrors: 0, LaErrors: 0, Underruns: 0, 0
    === Heat ===
    Bed heaters = 0 -1 -1 -1, chamberHeaters = -1 -1
    === GCodes ===
    Segments left: 0
    Stack records: 2 allocated, 0 in use
    Movement lock held by null
    http is idle in state(s) 0
    telnet is idle in state(s) 0
    file is idle in state(s) 0
    serial is idle in state(s) 0
    aux is idle in state(s) 0
    daemon is idle in state(s) 0
    queue is idle in state(s) 0
    autopause is idle in state(s) 0
    Code queue is empty.
    === Network ===
    Slowest loop: 15.52ms; fastest: 0.00ms
    Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
    HTTP sessions: 1 of 8

    • WiFi -
      Network state is running
      WiFi module is connected to access point
      Failed messages: pending 0, notready 0, noresp 0
      WiFi firmware version 1.23
      WiFi MAC address ec:fa:bc:2d:dc:69
      WiFi Vcc 3.38, reset reason Turned on by main processor
      WiFi flash size 4194304, free heap 25752
      WiFi IP address 192.168.0.25
      WiFi signal strength -62dBm, reconnections 0, sleep mode modem
      Socket states: 0 0 0 0 0 0 0 0
      === Filament sensors ===
      Extruder 0 sensor: ok
      any ideas


  • check the current draw and actual voltage at the printer terminals? could either be poor connections, thin wires or a wide range of issues.

    if you don't have the means to measure, check what the duet says the voltage is when printer is ide; if it reports the correct voltage at idle, the problem should be with the wirng or the power supply.



  • @bearer thank you


  • administrators

    Or you might have had a power brownout, like I did yesterday.


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