I think my Duet and/or Duex5 is/are dying

[dc42]

@deckingman said in I think my Duet and/or Duex5 is/are dying:

Could you expand on what is meant by connecting a PC terminal emulator via USB?

I meant connect the Duet USB port to a PC and use a terminal emulator program (e.g. YAT) on the PC to connect to the Duet. Just like the way we suggest communicating with a Duet WiFi to set up the SSID and password.

[brunofporto]

@deckingman said in I think my Duet and/or Duex5 is/are dying:

Aren't those jump wires too thin?

I had some issues with my PC memory from time to time. After some months if a move the cabinet then the memory had issues.

I solve that by cleaning all contacts and reinsert the memory. My hypothesis is that it oxidized a thin layer around the connection and when I moved the PC it reallocate slightly the connections causing the issue.

Maybe the ribbon cable connection have this issue. Try cleaning them with some proper product (not sure the name in English, here is "contact cleaner").

[deckingman]

@brunofporto said in I think my Duet and/or Duex5 is/are dying:

@deckingman said in I think my Duet and/or Duex5 is/are dying:

Aren't those jump wires too thin?

They are good for at least 20Amps, so 480 watts@24V. Given that I only use a 200Watt PSU for entire printer and the Duex only has 5 extruders and a few fans connected to it, I'd say they are more than adequate.

[elmoret]

Those brown wires are good for 20A? generally 20A means at least 14ga. Those don't look like 14ga wires.

I don't think that's your problem, but I wouldn't put 20A through what looks like 20ga wires.

[deckingman]

@elmoret. Assuming by brown wires you mean the solid copper links, then I thought they were 2.5mm but they might be 1.5mm. So conservatively they are good for 20Amps - could be 27 amps if they are 2.5mm. https://www.stroma.com/news/current-carrying-capacity-for-cables

I've no idea what the US equivalent of that is but over here in the UK it's what we use for out house wiring. We call it it twin and earth and those links came out of the main insulated twin cores (not the solid earth which is thinner).

Edit. Just measured them with my digital calipers and they are 1.5mm, so good for 20Amps as I stated.

[elmoret]

They look like brown, insulated wires. If they're bare copper then I agree the diameter is suitable.

I definitely wouldn't use bare exposed copper wires like that, too much risk of short, but again unrelated to the problem you're posting about.

[deckingman]

@elmoret Just out of curiosity,have we met? Have I done or said something to offend you?

[elmoret]

We have met, and I'm not offended, just trying to help.

[fcwilt]

Hi,

Have you tried a different power supply?

Frederick

[deckingman]

@fcwilt said in I think my Duet and/or Duex5 is/are dying:

Hi,

Have you tried a different power supply?

Frederick

Interesting thought. Although I've never seen anything other than normal voltage, even when I've been throwing my 4.5 Kg mass around at 300 + mm/sec for hours on end. So I'm struggling to see how it could be a PSU issue but I do have another, bigger, fan cooled (and therefore noisy) one that I can try.

[dragonn]

I think bare copper wire can easier get covered with patina. The get "darker" over time, maybe this makes the connection not perfect?

[deckingman]

@dragonn said in I think my Duet and/or Duex5 is/are dying:

I think bare copper wire can easier get covered with patina. The get "darker" over time, maybe this makes the connection not perfect?

But there is no way of getting around that. Even if the links were insulated between the terminal blocks, the insulation still has to be stripped back where they go into the block. It has to be bare copper to make a contact. In theory, the screws make an airtight seal on the copper where it makes contact which prevent oxidisation. In any case, as per my post of 1st November 20:20, I checked for signs of oxidation where the screws bite into the copper and there is none.

[JoergS5]

@deckingman I thought about your problems and I have no good ideas, but maybe these thoughts help:

The sudden, seldom problem:

• power shortage or current peak. Caused by mains power or by a household appliance that produces EMC. (My experience: a switch has already once killed a lamp). Maybe too short to be in the protocol.

The regular problem:

• measuring temperaturs of the components and finding elements too hot or too cold, with a laser pointered temperature gauge. But then comparable information of a 100% working Duet would be valuable to decide. (My experience: the plug on my laptop gets warm when the contact is not good.)

[deckingman]

@joergs5 Thanks for taking the time but maybe something got lost in translation.

The "sudden seldom" problem is something related to I2C errors. It's only happened 3 times in the last 4 weeks or so. Also, it's only ever happened after homing but never in the middle of a print. I guess it could be something related to the mains supply but I have an extensive computer network including a NAS and media server, numerous switches and so forth, all running on the same circuit and no other devices have shown any unusual behaviour.

The "regular problem" is simply some sort of delay in the boot up time. It happens every time the Duet is powered up or reset after editing config g. In the former case (power up) everything is at ambient temperature.

[JoergS5]

@deckingman Yes I missed and misunderstood some of your information.

At least you don't have damaged prints from your "sudden seldom" print. It's difficult to analyze a non-reproducible error.

In case of a delay error I would have thought of a reason like waiting for a component like Wifi, sensor or protocol feedback. Maybe a functionality in firmware and waiting for timeout (or delay, waiting e.g. for fan speed up) because it is not present or not behaving as expected. I don't know the debugger/profiler possibilites of the Eclipse development environment enough, but there should be a tool to analyze your startup exactly.

[deckingman]

@joergs5 Yes. One thing it does is a sort of double start up, as if it starts and then resets a couple of seconds later. David (DC42) has said that this is not normal and there will be a change in the next RC firmware which might fix it.

[deckingman]

Sorry to resurrect this old thread but I've just experienced the second issue that I reported in my opening post. That is to say, I turned the printer on and ran my normal homing macro and noticed long pauses between commands. Ignoring this, I started a print and had the exact same issues - it would print a few moves, then pause for several seconds, then print few more. I aborted the print, cycled the power and everything worked as normal.

This only happens once every few months so it's a bugger to track down. I did have the forethought to run M122 while it was printing and pausing. Here it is:
...........................................................................................................
M122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 2.02RC4(RTOS) running on Duet Ethernet 1.0 or 1.01 + DueX5
Board ID: 08DAM-999TL-MQ4S8-6J9FA-3SJ6K-95B7W
Used output buffers: 1 of 20 (18 max)
=== RTOS ===
Static ram: 27476
Dynamic ram: 99268 of which 0 recycled
Exception stack ram used: 512
Never used ram: 3816
Tasks: NETWORK(ready,400) HEAT(blocked,1176) MAIN(running,3840) IDLE(ready,200)
Owned mutexes:
=== Platform ===
Last reset 00:20:59 ago, cause: power up
Last software reset at 2018-12-05 11:36, reason: User, spinning module GCodes, available RAM 4044 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: 9
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest block write time: 15.6ms, max retries 0
MCU temperature: min 32.1, current 32.8, max 34.5
Supply voltage: min 24.3, current 24.5, max 24.7, under voltage events: 0, over voltage events: 0, power good: yes
Driver 0: standstill, SG min/max 0/320
Driver 1: standstill, SG min/max 0/291
Driver 2: standstill, SG min/max 0/1023
Driver 3: standstill, SG min/max 0/279
Driver 4: standstill, SG min/max 0/287
Driver 5: standstill, SG min/max 0/164
Driver 6: standstill, SG min/max not available
Driver 7: standstill, SG min/max 0/1023
Driver 8: standstill, SG min/max 0/1023
Driver 9: standstill, SG min/max not available
Date/time: 2019-01-11 15:02:50
Cache data hit count 4294967295
Slowest loop: 245.51ms; fastest: 29.15ms
I2C nak errors 0, send timeouts 66285, receive timeouts 0, finishTimeouts 66285
=== Move ===
Hiccups: 0, StepErrors: 0, LaErrors: 0, FreeDm: 165, MinFreeDm: 115, MaxWait: 269067ms, Underruns: 0, 0
Scheduled moves: 194, completed moves: 179
Bed compensation in use: none
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 = 0.3
Heater 1 is on, I-accum = 0.5
=== 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: 221.69ms; fastest: 0.03ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
HTTP sessions: 1 of 8
Interface state 5, link 100Mbps full duplex
...............................................................................................................
Nothing leaps out at me and I don't see the I2C errors that I've had in the past but maybe someone else can spot something.

May it's a "red herring" but it seems to happen when I haven'y used the printer for some time. In this case, I have been away for about 5 weeks.

[whosrdaddy]

@deckingman said in I think my Duet and/or Duex5 is/are dying:

I2C nak errors 0, send timeouts 66285, receive timeouts 0, finishTimeouts 66285

You definitely have an issue with sending I2C commands to your Duex5 according to this output...

[dc42]

Please upgrade to firmware 2.02. The I2C driver has been completely rewritten since the 2.02RC version that you are using.

[deckingman]

@dc42 said in I think my Duet and/or Duex5 is/are dying:

................ The I2C driver has been completely rewritten since the 2.02RC version that you are using.

Oh really? Since RC4? I must have missed that.

Thanks - I'll give it a try.