Odd Extruder Pausing - 1LC - Toolboard Duet 3 Mini

SputnikOC3d

Just started getting very odd extruder feed pauses. Seems very strange.

If I ask DWC o extrude at temps [ ABS+ 255c ] 100 mm of material at 5mm/s - it will spew out about 30-40 mm / pause - send another 20mm then pause and so on - it extrudes in fits and starts - as if the can bus is confused or the motor is losing steps. Its not clicking. It s got good grip on material. Its coming off the roll with minimal friction. Totally at a loss ...

1LC - Toolboard + Duet 3 Mini / SBC Mode

M122
=== Diagnostics ===
RepRapFirmware for Duet 3 Mini 5+ version 3.4.0 (2022-03-15 18:59:15) running on Duet 3 Mini5plus Ethernet (SBC mode)
Board ID: 1JDTH-UA67A-G65J0-40TFU-22D0Z-R2KLQ
Used output buffers: 1 of 40 (12 max)
=== RTOS ===
Static ram: 103684
Dynamic ram: 97612 of which 0 recycled
Never used RAM 37320, free system stack 138 words
Tasks: SBC(ready,2.9%,446) HEAT(notifyWait,0.0%,338) Move(notifyWait,0.1%,269) CanReceiv(notifyWait,0.0%,772) CanSender(notifyWait,0.0%,346) CanClock(delaying,0.0%,337) TMC(notifyWait,1.2%,71) MAIN(running,94.8%,498) IDLE(ready,0.2%,29) AIN(delaying,0.8%,264), total 100.0%
Owned mutexes: HTTP(MAIN)
=== Platform ===
Last reset 00:31:22 ago, cause: software
Last software reset at 2022-04-11 23:58, reason: User, GCodes spinning, available RAM 37992, slot 0
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00000000 BFAR 0xe000ed38 SP 0x00000000 Task SBC Freestk 0 n/a
Error status: 0x00
MCU revision 3, ADC conversions started 1882694, completed 1882694, timed out 0, errs 0
Step timer max interval 1481
MCU temperature: min 32.0, current 39.4, max 44.2
Supply voltage: min 23.8, current 24.0, max 24.1, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 99/11, heap memory allocated/used/recyclable 2048/918/780, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: standstill, SG min 0, read errors 0, write errors 1, ifcnt 36, reads 40018, writes 24, timeouts 0, DMA errors 0, CC errors 0
Driver 1: standstill, SG min 0, read errors 0, write errors 1, ifcnt 36, reads 40018, writes 24, timeouts 0, DMA errors 0, CC errors 0
Driver 2: standstill, SG min 0, read errors 0, write errors 1, ifcnt 36, reads 40017, writes 24, timeouts 0, DMA errors 0, CC errors 0
Driver 3: standstill, SG min 0, read errors 0, write errors 1, ifcnt 36, reads 40017, writes 24, timeouts 0, DMA errors 0, CC errors 0
Driver 4: standstill, SG min 0, read errors 0, write errors 1, ifcnt 19, reads 40033, writes 9, timeouts 0, DMA errors 0, CC errors 0
Driver 5: standstill, SG min 0, read errors 0, write errors 1, ifcnt 59, reads 39994, writes 47, timeouts 0, DMA errors 0, CC errors 0
Driver 6: standstill, SG min 0, read errors 0, write errors 1, ifcnt 55, reads 39998, writes 43, timeouts 0, DMA errors 0, CC errors 0
Date/time: 2022-04-12 00:30:18
Cache data hit count 4011539488
Slowest loop: 311.19ms; fastest: 0.07ms
=== Storage ===
Free file entries: 10
SD card 0 not detected, interface speed: 0.0MBytes/sec
SD card longest read time 0.0ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, segments created 10, maxWait 459926ms, bed compensation in use: mesh, comp offset 0.000
=== MainDDARing ===
Scheduled moves 593, completed 593, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 30], 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
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP* is doing "M122" 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 17597, received 37814, lost 0, boc 0
Longest wait 3ms for reply type 6053, peak Tx sync delay 156, free buffers 18 (min 16), ts 9413/9412/0
Tx timeouts 0,0,0,0,0,0
=== SBC interface ===
Transfer state: 4, failed transfers: 0, checksum errors: 0
RX/TX seq numbers: 9348/9348
SPI underruns 0, overruns 0
State: 5, disconnects: 0, timeouts: 0, IAP RAM available 0x0f6b8
Buffer RX/TX: 0/0-0, open files: 0
=== Duet Control Server ===
Duet Control Server v3.4.0
Code buffer space: 4096
Configured SPI speed: 8000000Hz, TfrRdy pin glitches: 0
Full transfers per second: 39.82, max time between full transfers: 168.1ms, max pin wait times: 91.1ms/24.8ms
Codes per second: 0.87
Maximum length of RX/TX data transfers: 3484/1232

M122 B121
Diagnostics for board 121:
Duet TOOL1LC rev 1.1 or later firmware version 3.4.0 (2022-03-15 09:00:04)
Bootloader ID: SAMC21 bootloader version 2.3 (2021-01-26b1)
All averaging filters OK
Never used RAM 2624, free system stack 45 words
Tasks: Move(notifyWait,0.0%,99) HEAT(notifyWait,0.4%,95) CanAsync(notifyWait,0.0%,57) CanRecv(notifyWait,0.0%,74) CanClock(notifyWait,0.0%,65) ACCEL(notifyWait,0.0%,61) TMC(notifyWait,3.0%,57) MAIN(running,91.6%,351) IDLE(ready,0.0%,26) AIN(delaying,4.9%,142), total 100.0%
Last reset 00:36:35 ago, cause: software
Last software reset data not available
Driver 0: pos 358464, 415.0 steps/mm,standstill, SG min 0, read errors 0, write errors 1, ifcnt 33, reads 48788, writes 20, timeouts 0, DMA errors 0, CC errors 0, steps req 361028 done 361028
Moves scheduled 545, completed 545, in progress 0, hiccups 0, step errors 0, maxPrep 477, maxOverdue 2, maxInc 1, mcErrs 0, gcmErrs 0
Peak sync jitter -5/10, peak Rx sync delay 214, resyncs 0/0, no step interrupt scheduled
VIN voltage: min 23.7, current 23.9, max 24.1
MCU temperature: min 37.2C, current 49.8C, max 51.6C
Last sensors broadcast 0x00000002 found 1 94 ticks ago, 0 ordering errs, loop time 1
CAN messages queued 44082, send timeouts 0, received 20414, lost 0, free buffers 37, min 36, error reg 110000
dup 0, oos 0/0/0/0, bm 0, wbm 0, rxMotionDelay 361, adv 35831/74649
Accelerometer: LIS3DH, status: 00
I2C bus errors 0, naks 3, other errors 0

ctilley79

@sputnikoc3d you know, I’m having some strange pauses as well. My purge strip for example. There’s now a brief pause between these two lines of code where there didn’t used to be. I’m using a 1LC 1.1

G1 X60 E12 F1000
G1 X100 E15.5 F1000

Phaedrux

@sputnikoc3d Can you try gathering some logs on the SBC?

https://github.com/Duet3D/DuetSoftwareFramework/wiki/SBC-Setup-Guide#increasing-log-level

@ctilley79 Are you using an SBC as well?

ctilley79

@phaedrux yes

SputnikOC3d

@Phaedrux Ok so Im reviving this thread ...

I took the whole toolboard off the machine - checked it over extensively for anything out of the ordinary. This is my 4th 1LC Ive owned, 2nd Ive used.

I re-crimped all connectors - fans / motor / probe. Power and CAN-Bus I left as is. I re meshed the extruder gears to make sure filament and path was clear and the bondtech gears had good grip.

Im at the point where m pretty sure its either the motor or the motor driver connector on the board. Everything on the toolboard functions flawlessly.

PWM Fans, temp sensors, hot end, part cooling fan, probe, heater , onboard led's. Temps on hot end are rock solid. Only thing thats pear shaped is the extruder/extrusion. As above, when using dwc for 100mm @ 5mm/s - I get pauses and it feeds material in fits and starts. 50 mm lengths similar. 10-20 mm lengths at higher feed rates seem to go ok as theyre quick birsts hard to know if theyre flawed.

I havent been able to do an update via the unstable server as I m wifi / interweb challenged and will have to take the machine up to the house from the garage shop to connect to stable wifi.

Any other thoughts ?

Phaedrux

Do you have another toolboard handy to test with?
Can you test with a different CAN cable?
Were you able to test with 3.4.1 RC1 on the unstable branch?
Are you able to test in standalone mode?

dhusolo

I'm having a similar issue. Duet 3 + RPI4 and tool board. randomly I will get under extrusion. If i restart the pi the issue seems to go away. Next time it happens I'll try gathering the DSF logs

dc42

@sputnikoc3d said in Odd Extruder Pausing - 1LC - Toolboard Duet 3 Mini:

If I ask DWC o extrude at temps [ ABS+ 255c ] 100 mm of material at 5mm/s - it will spew out about 30-40 mm / pause - send another 20mm then pause and so on - it extrudes in fits and starts - as if the can bus is confused or the motor is losing steps. Its not clicking. It s got good grip on material. Its coming off the roll with minimal friction. Totally at a loss ...

What extruder motor current have you set? Does the tool board have any ventilation? Do you use a heated chamber?

I am wondering whether the stepper driver chip could be overheating. That would cause it to cut the motor current, then restore it when the chip has cooled down a little.

A command to extrude 50mm of filament with no other movement will be sent as a single CAN command, so it's not likely to be anything to do with CAN communications.

dhusolo

@dc42 Personally I have a fully enclosed printer liquid cooled hotend and Mellow NF-Sunrise with current set to 900. I don't print ABS so at most my hotend temps are 230c and bed temps 75c. I've noticed it happens when the pi has been running for a day or more. After it happens I can let the hotend cool down, reboot the pi and it doesn't under-extrude anymore.

I have another printer with the same setup minus the liquid cooled hotend and it doesn't have this issue.

SputnikOC3d

@dc42 TY for your input and posting. Ive been away on business and travel so have just got back into the 3d shop to tinker here in the last week or so.

After spending approx $450 on "stuff" chasing down these gremlins [ toolboards / hotends / filaments / bondtech gears / thermistors / heaters et al ... Its come down to the Voron CW1 extruder IMHO.

I bolted up an LGX Lite and that with a some new heaters and therms - seemed to allow me to print ABS. Still no go with the eSUN ABS+ Im now thinking I got some mislabeled material from them. Atomic abs prints pretty well now.

I did have ot go to square one with this issue and essentially reset all things all over to day 1. It got that crazy. I nthe process I killed a 1LC, 2 thermistors and 1 cheapo heater. The heat actually may have been the impetus for most all mys initial issues from the onset. It wasn the problem but i think it kicked off a chain of events that threw sooo many things out of whack - its complicated.

Im now retuning the machine for the unique things about the new hotends and better heaters and therms as well as the LGX Lite.

wdenker

@SputnikOC3d @dc42 did we get anywhere with this thread? I'm running into the same issues with a tool board in a heated chamber. Is there a way to check to see what the driver temperature is?

T3P3Tony

@wdenker said in Odd Extruder Pausing - 1LC - Toolboard Duet 3 Mini:

Is there a way to check to see what the driver temperature is?

A proxy for this, if you are running it hot, is the MCU temperature reported by M122 Bnnn where nnn is the address of the toolboard. The TMC2209 drives do not report their temperature, they do report over temperature warning AFAIR. please send M122 Bnnn when the motor is pausing.

wdenker

@T3P3Tony at what temperature do they shut down?

T3P3Tony

@wdenker from the datasheet, 143C:

https://www.trinamic.com/fileadmin/assets/Products/ICs_Documents/TMC2209_datasheet_rev1.09.pdf

However that's internal temperature generated from the MOSFETs inside the TMC2209, not chamber temperature. The hotter the chamber, the less motor current can be used before the driver overtemp kicks in.