Heater 1 and Fan1 Stopped Working

Sparks

Hi David….

Was investigating a new issue where the bed temperature doesn't rise with the heat of the bed and noticed the MCU temp is running way too high... can this be causing the issue? Th machine is just idling, no printing and the temp was touching 115 degrees? From M122...

MCU temperature: min 99.1, current 99.2, max 115.8

Sparks

Supply voltage looks ok…?

M122
=== Diagnostics ===
Used output buffers: 3 of 32 (8 max)
=== Platform ===
RepRapFirmware for Duet WiFi version 1.20 running on Duet WiFi 1.0 + DueX5
Board ID: 08DAM-999TL-MQ4S4-6J1FG-3SD6S-TPGRY
Static ram used: 15448
Dynamic ram used: 99416
Recycled dynamic ram: 3920
Stack ram used: 1392 current, 4504 maximum
Never used ram: 7784
Last reset 00:05:29 ago, cause: software
Last software reset at 2018-01-06 14:37, reason: User, spinning module GCodes, available RAM 7784 bytes (slot 1)
Software reset code 0x0003 HFSR 0x00000000, CFSR 0x00000000, ICSR 0x0441f000, BFAR 0xe000ed38, SP 0xffffffff
Error status: 0
Free file entries: 10
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest block write time: 0.0ms
MCU temperature: min 99.1, current 99.2, max 115.8
Supply voltage: min 24.8, current 25.0, max 25.3, under voltage events: 0, over voltage events: 0
Driver 0: standstill, SG min/max not available
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
Driver 5: standstill, SG min/max not available
Driver 6: standstill, SG min/max not available
Driver 7: standstill, SG min/max not available
Driver 8: standstill, SG min/max not available
Driver 9: standstill, SG min/max not available
Expansion motor(s) stall indication: no
Date/time: 1970-01-01 00:00:00
Cache data hit count 1314881303
Slowest main loop (seconds): 0.014140; fastest: 0.000045
=== Move ===
MaxReps: 0, StepErrors: 0, FreeDm: 240, MinFreeDm 240, MaxWait: 0ms, Underruns: 0, 0
Scheduled moves: 0, completed moves: 0
Bed compensation in use: mesh
Bed probe heights: 0.000 0.000 0.000 0.000 0.000
=== Heat ===
Bed heaters = 0 -1 -1 -1, chamberHeaters = -1 -1
Heater 0 is on, I-accum = 0.0
Heater 3 is on, I-accum = 0.0
=== GCodes ===
Segments left: 0
Stack records: 1 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 state is running
WiFi module is connected to access point
Failed messages: pending 0, notready 0, noresp 0
WiFi firmware version 1.20
WiFi MAC address 60:01:94:09:ba:08
WiFi Vcc 3.36, reset reason Turned on by main processor
WiFi flash size 4194304, free heap 17288
WiFi IP address 192.168.1.5
WiFi signal strength -56dBm, reconnections 0, sleep mode modem
HTTP sessions: 1 of 8
Socket states: 2 0 0 0 0 0 0 0
Responder states: HTTP(1) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0)
2:42:53 PMMessage Log cleared!

dc42

Is the MCU really running that hot? If so, something is wrong. If not, perhaps you have a bad M912 command in config.g.

The voltage reading looks a little high, but if the 3.3V rail voltage is low that will cause an artificially high reading, because the 3.3V rail is the voltage reference when the MCU measures VIN.

Sparks

Just checked wit IR thermometer… around 32 degrees on the sticker on top of the chip....? I have no M912 in config.g....

Also if I unplug the bed thermistor... temp still shws 28 degrees.... I am plagues by wierdness

How do I measure 3.3V rail?

Sparks

3.225V on Duex 5 GPIO pins…

Sparks

3.222 across pin 1 and 2 on Con_LCD connector on Duet Wifi

Sparks

MCU at 41.1C now using external thermometer

dc42

Send M912 with no parameters, to check that no CPU temperature calibration is being applied. AFAIR, before calibration the MCU temperature on the ATSAM4E on the generation 2 Duets should be within 14C of the correct value.

The voltage reading on the 3.3V rail looks too low, it should be with 2% of 3.3V. Assuming your multimeter is accurate, I suspect either too much load on the 3.3V rail (in which case the 3.3V regulator IC U2 will be getting hot), or the 5V rail is at less than 4V.

Sparks

4:07:21 PMM912
MCU temperature calibration adjustment is 0.0°C

Across jumpers for int_5v and V_Fan.. 4.88V

Sparks

Voltage at board input from PS is 24.29V

Sparks

U2 Regulator measures 38C with the Temperature guns Laser centred on it.

Sparks

Still cant understand why when I have no thermistor plugged into the H0 Heatbed pins … it reports 25.4C on the display??? Where could it possibly be getting this from.... I would expect a heater fault error and a 20000 display....

5:15:22 PMM105
T:26.2 /0.0 27.0 /0.0 26.2 /0.0 27.0 /0.0 B:25.0 /0.0

Sparks

This doesn't work either…

M307 H4 A90 C700 D10 I0 V0 S1.0 ; remapped to heat bed From Duex5 E4 temp sensor
M305 P0 X4 T100000 B4388 R4700 H30 L0 ; Put your own H and/or L values here to set the bed thermistor ADC correction

dc42

Unfortunately it sounds as though the ADC in the microcontroller may be blown.

Sparks

Ouch!! Oh well, I shall have to get another board, at least I learnt a bit more along the way do you have stock?

Sparks

Order placed… and for the new IR probe.

Thanks for all the help David,

dc42

If you are in the USA, forum user W3DRK may be able to replace the MPU for you.

Sparks

Hi Dave,

Just checked my original order and it was in September… so I guess it is still under warranty! I am in South Africa, so what do I need to do to claim? I have ordered another in the meantime.... but it would be good to have a spare...

Order Details
Order ID: #414
Date Added: 15/09/2016 Payment Method: PayPal

Product Name Model Quantity Price Total
Duet Wifi

PreOrderBatch: Batch5
Addon Hardware: PT100 daughterboard
Addon Hardware: PanelDue with 4.3&qu.. DuetWifi 1

dc42

If it was delivered in September 2016 not 2017 then it is out of warranty.

Do you know anyone local to you who can replace the processor? If your soldering skills are good enough you could try it yourself. Use ChipQuik or similar low melting point solder and a cheap vacuum pick up tool to remove the old one. There are videos on YouTube.

Btw the more recent Duet versions have improved protection for the ADC.

Sparks

Oh gosh you are right sorry late night !! I have dome some SMD repairs before so I will take a look when I remove it. Dot think I have done so many legs before though (older Atmel stuff mostly)