Error: Driver 0.5 error: phase B short to Vin

TomF

My 3D printer with Duet 3 Mini 5+ has been working quite well, but today it stopped with the following message:

I made a M122 query and got this result:

M122
=== Diagnostics ===
RepRapFirmware for Duet 3 Mini 5+ version 3.4.0 (2022-03-15 18:59:15) running on Duet 3 Mini5plus WiFi (standalone mode)
Board ID: XZZAQ-X296U-D65J0-40KMQ-2Z03Z-ZFS7W
Used output buffers: 3 of 40 (22 max)
=== RTOS ===
Static ram: 103684
Dynamic ram: 110480 of which 24 recycled
Never used RAM 27428, free system stack 134 words
Tasks: NETWORK(ready,15.5%,216) HEAT(notifyWait,0.0%,340) Move(notifyWait,0.0%,292) CanReceiv(notifyWait,0.0%,942) CanSender(notifyWait,0.0%,356) CanClock(delaying,0.0%,339) TMC(delaying,1.2%,114) MAIN(running,82.4%,428) IDLE(ready,0.1%,29) AIN(delaying,0.8%,273), total 100.0%
Owned mutexes: WiFi(NETWORK)
=== Platform ===
Last reset 00:07:08 ago, cause: power up
Last software reset at 2022-04-21 14:37, reason: User, GCodes spinning, available RAM 23900, slot 2
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00000000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
MCU revision 3, ADC conversions started 428469, completed 428469, timed out 0, errs 0
Step timer max interval 752
MCU temperature: min 33.8, current 35.8, max 35.9
Supply voltage: min 24.4, current 24.5, max 24.5, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: standstill, SG min 0, read errors 0, write errors 0, ifcnt 13, reads 38886, writes 13, timeouts 0, DMA errors 0, CC errors 0
Driver 1: standstill, SG min 0, read errors 0, write errors 0, ifcnt 13, reads 38886, writes 13, timeouts 0, DMA errors 0, CC errors 0
Driver 2: standstill, SG min 0, read errors 0, write errors 0, ifcnt 12, reads 38887, writes 12, timeouts 0, DMA errors 0, CC errors 0
Driver 3: standstill, SG min 0, read errors 0, write errors 0, ifcnt 12, reads 38887, writes 12, timeouts 0, DMA errors 0, CC errors 0
Driver 4: standstill, SG min 0, read errors 0, write errors 0, ifcnt 13, reads 38886, writes 13, timeouts 0, DMA errors 0, CC errors 0
Driver 5: standstill, SG min 0, read errors 0, write errors 0, ifcnt 10, reads 38889, writes 10, timeouts 0, DMA errors 0, CC errors 0
Driver 6: standstill, SG min 0, read errors 0, write errors 0, ifcnt 9, reads 38890, writes 9, timeouts 0, DMA errors 0, CC errors 0
Date/time: 2022-05-09 14:58:00
Cache data hit count 808294834
Slowest loop: 6.12ms; fastest: 0.13ms
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 22.5MBytes/sec
SD card longest read time 3.0ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, segments created 4, maxWait 143254ms, bed compensation in use: mesh, comp offset 0.043
=== MainDDARing ===
Scheduled moves 14, completed 14, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters 0 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
Heater 1 is on, I-accum = 0.0
=== GCodes ===
Segments left: 0
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
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Aux2 is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty
=== CAN ===
Messages queued 3853, received 0, lost 0, boc 0
Longest wait 0ms for reply type 0, peak Tx sync delay 0, free buffers 18 (min 18), ts 2142/0/0
Tx timeouts 0,0,2141,0,0,1710 last cancelled message type 30 dest 127
=== Network ===
Slowest loop: 17.16ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions
HTTP sessions: 2 of 8

WiFi -
Network state is active
WiFi module is connected to access point
Failed messages: pending 0, notready 0, noresp 0
WiFi firmware version 1.26
WiFi MAC address d8:bf:c0:14:e7:f2
WiFi Vcc 3.33, reset reason Power up
WiFi flash size 2097152, free heap 24024
WiFi IP address 192.168.1.148
WiFi signal strength -78dBm, mode 802.11n, reconnections 0, sleep mode modem
Clock register 00002002
Socket states: 0 0 0 0 0 0 0 0

I can't see anything wrong there so I just restarted the print and it seems to be working okay, but I'd like to have a better idea of what this is and what to fix it so there is no repeat. Help appreciated.

Phaedrux

@tomf said in Error: Driver 0.5 error: phase B short to Vin:

Error: Driver 0.5 error: phase B short to Vin

Which motor is that driver connected to?

Did it stop during a print? How fast was it moving?

Please share your config.g and the motor specs.

TomF

Hi Phaedrux

I don't know which motor - how can I determine that?

Yes, it stops mid print. I'm not sure how fast - I'm was printing PLA with a 0.6 nozzle with the max speed capped at 120 mm/s and volumetric 15mm/s. Based on where it stopped I think it was going between 35 and 45mm/s at the time,

The fault occured again this morning which makes it unlikely to be a transient electrical issue.

Motor on XY and Z are Nema 17 Stepper Motor - 48mm - 1.8degree/step, 76oz-in (LDO-42STH47-2504AC)
Estruder is Nema 17 Stepper Motor - LDO Pancake / Slimline - 0.9degree/stepZoom

Here is my config.g:

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"T-Rat" ; set printer name
M669 K1 ; CoreXY
G29 S1 ; Set Units to Millimeters

; Network
M552 S1 ;TF - this sets the wifi or ethernet module to enabled.
M552 P192.168.1.144 ; enable network and acquire dynamic address via DHCP
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M569 P0.0 S0 D3 ; physical drive 0.0 goes forwards
M569 P0.1 S0 D3 ; physical drive 0.1 goes forwards
M569 P0.2 S0 D3 ; physical drive 0.2 goes forwards
M569 P0.3 S1 D3 ; physical drive 0.3 goes forwards
M569 P0.4 S1 D3 ; physical drive 0.4 goes forwards
M569 P0.5 S0 D3 ; physical drive 0.5 goes forwards
M584 X0.4 Y0.3 Z0.0:0.1:0.2 E0.5 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M911 S21.0 R30.0 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Power failure configuration

M92 X80.00 Y80.00 Z800.00 ; set steps per mm
M906 X1000 Y1000 Z800 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

M566 X600.00 Y600.00 Z60.0 E600.00 P1 ; set maximum instantaneous speed changes (mm/min)
M203 X36000.00 Y36000.00 Z1000.00 E3600.00 ; set maximum speeds (mm/min)
M201 X9000.00 Y9000.00 Z100.00 E3600.00 ; set accelerations (mm/s^2)

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X305 Y300 Z300 S0 ; set axis maxima

; Endstops
M574 X1 S1 P"io1.in" ; configure active high endstops
M574 Y2 S1 P"io0.in" ; configure active high endstops
M574 Z1 S2 ; configure Z-probe endstop for low end on Z

M671 X-4.5:150:304.5 Y-4.52:305:-4.52 S5 ; define positions of Z leadscrews or bed levelling screws
M557 X25:270 Y35:270 P5 ; define 5x5 mesh grid

; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B3950 A"Bed" ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0 ; create bed heater output on out5 and map it to sensor 0
M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S130 ; set temperature limit for heater 0 to 110C

;; Run Bed PID Tune
;; M307 H0 A303.1 C356.7 D1.4 S1.00 V24.0 B0
M307 H0 B0 R0.479 C511.2 D5.21 S1.00 V24.4

; Fans
M950 F0 C"out3" Q500 ; create fan 0 on pin out3 and set its frequency
M106 P0 C"Hotend Fan" S0 H1 T45 L255 ; set fan 0 name and value. Thermostatic control turned on for Hotend
M950 F1 C"out4" Q500 ; create fan 1 on pin out4 and set its frequency
M106 P1 C"Layer Fan" S0 H-1 L255 ; set fan 1 name and value. Thermostatic control is turned off

; Tools
M950 H1 C"out1" T1 ; create nozzle heater output on out2 and map it to sensor 1
M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S280 ; set the maximum temperature in C for heater

M563 P0 D0 H1 F1 ; 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

; EVA 2 / BMG / Mosquito 300C thermistor

M92 E830 ; set extruder steps per mm, 0.9 angle/step (LDO Pancake)
M906 E800 ; set extruder motor current (mA) and idle factor in per cent

M308 S1 P"temp1" Y"thermistor" T100000 B4680 C6.455513e-8 A"Hotend"
;; Run Heater PID Tune!!
;; M307 H1 A751.5 C196.6 D4.7 S1.00 V23.9 B0

; Z-Probe
; BLTouch
M950 S0 C"io2.out" ; Create a servo pin on io2
M558 P9 C"io2.in" H5 F240 T10800 A5 S0.04 ; set Z probe type to unmodulated and the dive height + speeds
G31 P25 X-26.00 Y-18.00 Z2.6 ; set Z probe trigger value, offset and trigger height, more Z means closer to the bed

M404 N1.75 D0.4 ; Filament width and nozzle diameter
T0

; Pressure Advance
M572 D0 S0.04

Phaedrux

Driver 0.5 appears to be mapped to your extruder.

It says it's a 0.9 deg pancake motor and you're using a larger bore nozzle and flow rate. It's possible that you need more or less current on that motor to maintain the extrusion speeds you're pushing.

You can enter your motor details here and see what it says https://www.reprapfirmware.org/emf.html

TomF

@phaedrux said in Error: Driver 0.5 error: phase B short to Vin:

Driver 0.5 appears to be mapped to your extruder.
It says it's a 0.9 deg pancake motor and you're using a larger bore nozzle and flow rate. It's possible that you need more or less current on that motor to maintain the extrusion speeds you're pushing.
You can enter your motor details here and see what it says https://www.reprapfirmware.org/emf.html

Okay, I'll take a look ASAP, but what does the error message mean? It sounds like there is a short or other electrical fault detected

Phaedrux

Since it's intermittent it may just be a case of back emf from trying to drive it too fast. If there was an actual wiring short it would give the warning constantly.

You can also use a multimeter to measure the resistance on each phase. That may indicate if there is a problem with the motor itself.

oliof

Another possibility is that there is some issue with the wiring but that only occurs at certain moves or positions of the print head. I had that happen to me with a partially dislodged crimp.

TomF

@phaedrux said in Error: Driver 0.5 error: phase B short to Vin:

Since it's intermittent it may just be a case of back emf from trying to drive it too fast. If there was an actual wiring short it would give the warning constantly.

You can also use a multimeter to measure the resistance on each phase. That may indicate if there is a problem with the motor itself.

@phaedrux It appears to be a motor issue. The phases measure differently and out of spec although there is no detectable short between phases. I will be replacing the motor and making some changes to make it last a bit longer (it has only had a working life of about 6 months)