Duet 2 Wifi Reading 36.3v instead of 24v
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So, I've read a few topics I could find on google on this subject but I'm out of ideas. (The search feature here is unhelpful or I'm just having millennial moments).
Plugged and wired up the Duet2 wifi, and was configuring it and hadn't done anything yet, and received a heater fault after about 20 minutes of being on. The heater cartridge smoked, and I believe got hot enough to thermistor before i could turn it off.
Anyway, I've got the heaters unplugged for now, but everything seems to be working just find in terms of voltage In (24V), 5V rail lights on, 3.3v lights on.
based on some other posts, R80 reads .81V R81 reads .81V with a multimeter. with the board off R81 reads 3.134ohms R81 reads 4.4ohms
The 3.3 voltage regular reads 5Vin 3.316v out.
So I don't know what the issue is, and I don't understand how the heater just turned on 20 minutes after I powered it up. I wasn't actively doing anything or commanding anything I was just configuring in the web interface.
Is there any other tests I can do? anyone ever run into this issue?
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What does 36.3 volts in your subject line refer to? Maximum input voltage on a Duet 2 Wifi is 25vdc.
As for the heater, I suspect you inadvertently turned it on while working in the web interface.
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Update the Heatbed thermistor pins are reading 2.3V instead of 3.3v.
The Extruder thermistor pins are working jsut fine reading 3.3v.
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@elmoret I edited it to clarify, the board will is reading the input voltage as 36.3v but it is actually recieveing 24v.
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Please post your config.g and the results of M122 and M98 P"config.g"
Give us some details on what you have connected and how.
What is the PSU?
What are the heaters?
What are the thermistors? -
Bed Stock CR-5 Pro H - standard 24V (300x225) heat bed.
40W 24V Standard heater
Extruder Therm: EPCOS 100K B57560G104F
Heatbed Therm: ATC Semitec 104GT-2// config.g
; Configuration file for Duet WiFi (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.16 on Thu Aug 24 2023 08:53:11 GMT-0400 (Eastern Daylight Time); General preferences
M575 P1 S1 B57600 ; enable support for PanelDue
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Amelia" ; set printer name; Network
M552 S0 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet; Drives
M569 P0 S1 ; physical drive 0 goes forwards
M569 P1 S1 ; physical drive 1 goes forwards
M569 P2 S1 ; physical drive 2 goes forwards
M569 P3 S1 ; physical drive 3 goes forwards
M584 X0 Y1 Z2 E3 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E420.00 ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y900.00 Z1002.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00 ; set accelerations (mm/s^2)
M906 X580 Y580 Z1250 E850 I30 ; 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 X300 Y225 Z380 S0 ; set axis maxima; Endstops
M574 X1 S1 P"xstop" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ystop
M574 Z1 S2 ; configure Z-probe endstop for low end on Z; Z-Probe
M950 S0 C"exp.heater3" ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H10 F120 T4800 ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X35 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
M557 X35:290 Y10:210 S20 ; define mesh grid; Heaters
M308 S0 P"bedtemp" Y"thermistor" B4725 C7.06e-8 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0 ; create bed heater output on bedheat 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 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B4066 R4700 ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1 ; create nozzle heater output on !e0heat and map it to sensor 1
M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S300 ; set temperature limit for heater 1 to 300C; Fans
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H1:0 T45 ; set fan 0 value. Thermostatic control is turned on
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H-1 ; set fan 1 value. Thermostatic control is turned off
M950 F2 C"fan2" Q500 ; create fan 2 on pin fan2 and set its frequency
M106 P2 S1 H1 T45 ; set fan 2 value. Thermostatic control is turned on; Tools
M563 P0 D0 H1 F0 ; 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; Custom settings are not defined
; Miscellaneous
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss//M122 Status
=== Diagnostics ===<LF>
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.4.0 (2022-03-15 18:58:31) running on Duet WiFi 1.02 or later<LF>
Board ID: 0JD2M-9F8TA-GJ4TD-6JKF0-3S46J-T6N27<LF>
Used output buffers: 1 of 24 (3 max)<LF>
=== RTOS ===<LF>
Static ram: 23868<LF>
Dynamic ram: 74532 of which 0 recycled<LF>
Never used RAM 13680, free system stack 193 words<LF>
Tasks: NETWORK(ready,6.5%,522) HEAT(suspended,0.0%,328) MAIN(running,91.7%,464) IDLE(ready,1.8%,30), total 100.0%<LF>
Owned mutexes: USB(MAIN)<LF>
=== Platform ===<LF>
Last reset 00:00:50 ago, cause: power up<LF>
Last software reset time unknown, reason: User, GCodes spinning, available RAM 13472, slot 0<LF>
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a<LF>
Error status: 0x00<LF>
Aux0 errors 0,0,0<LF>
Step timer max interval 0<LF>
MCU temperature: min 47.4, current 71.2, max 71.4<LF>
Supply voltage: min 36.3, current 36.3, max 36.3, under voltage events: 0, over voltage events: 0, power good: no<LF>
Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0<LF>
Events: 1 queued, 1 completed<LF>
Driver 0: ok, SG min n/a<LF>
Driver 1: ok, SG min n/a<LF>
Driver 2: ok, SG min n/a<LF>
Driver 3: ok, SG min n/a<LF>
Driver 4: ok, SG min n/a<LF>
Driver 5: <LF>
Driver 6: <LF>
Driver 7: <LF>
Driver 8: <LF>
Driver 9: <LF>
Driver 10: <LF>
Driver 11: <LF>
Date/time: 1970-01-01 00:00:00<LF>
Cache data hit count 1951097389<LF>
Slowest loop: 2.28ms; fastest: 0.15ms<LF>
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0<LF>
=== Storage ===<LF>
Free file entries: 10<LF>
SD card 0 detected, interface speed: 20.0MBytes/sec<LF>
SD card longest read time 0.5ms, write time 0.0ms, max retries 0<LF>
=== Move ===<LF>
DMs created 83, segments created 0, maxWait 0ms, bed compensation in use: none, comp offset 0.000<LF>
=== MainDDARing ===<LF>
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1<LF>
=== AuxDDARing ===<LF>
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1<LF>
=== Heat ===<LF>
Bed heaters 0 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0<LF>
=== GCodes ===<LF>
Segments left: 0<LF>
Movement lock held by null<LF>
HTTP is idle in state(s) 0<LF>
Telnet is idle in state(s) 0<LF>
File is idle in state(s) 0<LF>
USB is ready with "M122" in state(s) 0<LF>
Aux is idle in state(s) 0<LF>
Trigger is idle in state(s) 0<LF>
Queue is idle in state(s) 0<LF>
LCD is idle in state(s) 0<LF>
Daemon is idle in state(s) 0<LF>
Autopause is idle in state(s) 0<LF>
Code queue is empty<LF>
=== Network ===<LF>
Slowest loop: 0.25ms; fastest: 0.00ms<LF>
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions<LF>
HTTP sessions: 0 of 8<LF>- WiFi -<LF>
Network state is starting2<LF>
WiFi module is disabled<LF>
Failed messages: pending 0, notready 0, noresp 0<LF>
Socket states: 0 0 0 0 0 0 0 0<LF>
ok<LF>
- WiFi -<LF>
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@nickjallday said in Duet 2 Wifi Reading 36.3v instead of 24v:
Supply voltage: min 36.3, current 36.3, max 36.3, under voltage events: 0, over voltage events: 0, power good: no
And your multimeter is getting 24v at the vin terminals?
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Yes
Reading 24v at the psu VIN
Reading 5v VIN at the 5v to 3.3v converter
Z-probe 3.3v pin reads good at 3.3v
Reading 3.3v at the e0/e1 thermsistor pins
Reading 2.1v on the bed thermsistor pins -
When and where was the board purchased?
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@nickjallday please unplug everything from the board except for VIN power, and see if the VIN voltage still reads 36V.
The ADCs in the microcontroller can be affected by injection current if there is an over-voltage on any of the pins, in particular the thermistor pins.
