Random underextrusion Problem

Frederik

@Veti
Interesting article!

The artefacts occurring again. I have increased the extruder gear pressure until the end of the screw

Veti

@Frederik said in Random underextrusion Problem:

Is it possible to create secure zones where the print head would collide with something?for example: if I home y and the print head is at X0 my spindles would collide with my bltouch. So I want a zone perhaps 50x30 where the tool head automatically goes around or alters the X position +50??

no

for filamant config see
https://duet3d.dozuki.com/Wiki/Filaments

Frederik

@Veti the underextrusion occurs again. I have increased the pressure until the end of the screw of an original bmg.

matt3o

do you have pressure advance? RRF 3.2 has communication issues with the LC1 especially with pressure advance activated. You may try to install the alpha version 3.3

Frederik

@matt3o No Pressure Advance, its defined in my config with 0.000

I was trying to update to 3.3 but than i got massive DWC reconnect Problems and had to flash a new pi image and reset the mainboard firmware via usb

matt3o

@Frederik can you try to momentarily connect the extruder motor to the main duet3 board and see if it works that way?

Frederik

@matt3o that would be no problem. i got a spare cable thats long enough

Phaedrux

Is your bed PID tuned? Perhaps it's the cyclical heating and cooling expand contract on the bed causing the Z gap to change.

Frederik

@Phaedrux it is PID Tuned to 100 degree C. The same temp I was printing. The bed is a 4mm aluminium plate with a 4mm borosilicate plate on top. I let the temperatures stabilize bevor printing perhaps 15 to 20 min. Then a g32 +g29
Taper is set to 0, so it should be applied to the hole print.

I also print in a heated chamber with 70 C

Frederik

@matt3o @Phaedrux
Today, I tried the update to 3.3 beta a second time with a fresh image. Now it worked and i can see if there is any Jitter or lost can messages to the Toolboard.

Frederik

I am running now the first test print on 3.3 beta + LC1

here is a m122 from main and Toolboard at the start of the print

m122
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.3beta running on Duet 3 MB6HC v1.01 or later (SBC mode)
Board ID: 08DJM-956BA-NA3TN-6J9DL-3S46S-99AUT
Used output buffers: 1 of 40 (11 max)
=== RTOS ===
Static ram: 149784
Dynamic ram: 60720 of which 204 recycled
Never used RAM 139964, free system stack 139 words
Tasks: Linux(ready,119) HEAT(blocked,299) CanReceiv(blocked,861) CanSender(blocked,346) CanClock(blocked,326) TMC(blocked,16) MAIN(running,922) IDLE(ready,20)
Owned mutexes: HTTP(MAIN)
=== Platform ===
Last reset 00:09:29 ago, cause: software
Last software reset at 2021-01-31 18:05, reason: User, none spinning, available RAM 139964, slot 0
Software reset code 0x0012 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0x00000000 SP 0x00000000 Task Linu Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Aux1 errors 0,0,0
MCU temperature: min 48.8, current 49.4, max 49.6
Supply voltage: min 24.0, current 24.1, max 24.2, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 12.1, current 12.1, max 12.1, under voltage events: 0
Driver 0: position 64448, ok, reads 45610, writes 0 timeouts 0, SG min/max 0/538
Driver 1: position 14935, ok, reads 45610, writes 0 timeouts 0, SG min/max 0/324
Driver 2: position 1720, standstill, reads 45610, writes 0 timeouts 0, SG min/max 0/93
Driver 3: position 0, standstill, reads 45610, writes 0 timeouts 0, SG min/max 0/111
Driver 4: position 0, standstill, reads 45610, writes 0 timeouts 0, SG min/max 0/95
Driver 5: position 0, standstill, reads 45610, writes 0 timeouts 0, SG min/max not available
Date/time: 2021-01-31 18:14:39
Slowest loop: 218.06ms; fastest: 0.02ms
=== Storage ===
Free file entries: 10
SD card 0 not detected, interface speed: 37.5MBytes/sec
SD card longest read time 0.0ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 125, maxWait 111ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 6027, completed moves 6009, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state 3
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamberHeaters = 2 -1 -1 -1
Heater 0 is on, I-accum = 0.1
=== GCodes ===
Segments left: 1
Movement lock held by null
HTTP* is doing "M122" in state(s) 0
Telnet is idle in state(s) 0
File* is doing "G1 F3000 X255.895004 Y155.307999 E0.221520" 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.
=== Filament sensors ===
Extruder 0: no data received
=== CAN ===
Messages queued 3220, send timeouts 0, received 3083, lost 0, longest wait 7ms for reply type 6029, peak Tx sync delay 222, free buffers 48 (min 45)
=== SBC interface ===
State: 4, failed transfers: 0
Last transfer: 1ms ago
RX/TX seq numbers: 22987/22987
SPI underruns 0, overruns 0
Number of disconnects: 0, IAP RAM available 0x2d584
Buffer RX/TX: 400/1864-0
=== Duet Control Server ===
Duet Control Server v3.2.0
File:
Buffered code: G1 F3000 X255.895 Y155.308 E0.22152
Buffered code: G1 X255.965 Y155.378
Buffered code: G0 F7200 X254.977 Y154.986
Buffered code: G1 F3000 X258.423 Y151.54 E0.14912
Buffered code: G1 X258.493 Y151.47
Buffered code: G0 F7200 X259.331 Y149.693
Buffered code: G1 F3000 X254.199 Y144.56 E0.2221
Buffered code: G1 X254.129 Y144.49
Buffered code: G0 F7200 X254.158 Y144.517
Buffered code: G0 X254.109 Y146.803
Buffered code: G1 F3000 X261.14 Y139.772 E0.30426
Buffered code: G1 X261.21 Y139.702
Buffered code: G0 F7200 X261.201 Y139.702
Buffered code: G0 X258.481 Y139.792
Buffered code: G1 F3000 X261.14 Y142.45 E0.11504
Buffered code: G1 X261.21 Y142.52
Buffered code: G0 F7200 X261.201 Y142.52
Buffered code: G0 X261.14 Y144.297
Buffered code: G1 F3000 X260.009 Y145.428 E0.04894
Buffered code: G0 F7200 X259.64 Y145.476
Buffered code: G1 F3000 X256.34 Y142.176 E0.1428
Buffered code: G1 X256.27 Y142.106
Buffered code: G0 F7200 X256.299 Y142.133
Buffered code: G0 X259.64 Y145.797
Buffered code: G1 F3000 X256.746 Y148.691 E0.12523
Buffered code: G1 X256.676 Y148.761
Buffered code: G0 F7200 X256.697 Y148.759
Buffered code: G0 X256.613 Y149.748
Buffered code: G0 X256.045 Y150.932
Buffered code: G1 F3000 X259.02 Y153.908 E0.12876
Buffered code: G1 X259.09 Y153.978
Buffered code: G0 F7200 X259.349 Y155.139
==> 1472 bytes
Code buffer space: 2232
Configured SPI speed: 8000000 Hz
Full transfers per second: 41.83
Maximum length of RX/TX data transfers: 2808/1616
File /opt/dsf/sd/gcodes/bltouch.gcode is selected, processing

M122 b121

m122 b121
Diagnostics for board 121:
Duet TOOL1LC firmware version 3.3beta (2021-01-21 11:34:37)
Bootloader ID: SAMC21 bootloader version 2.2 (2021-01-16b1)
Never used RAM 3620, free system stack 0 words
Move 90 HEAT 91 CanAsync 66 CanRecv 74 CanClock 66 TMC 56 MAIN 197 AIN 62
Last reset 00:44:52 ago, cause: power up
Last software reset time unknown, reason: OutOfMemory, available RAM 15632, slot 1
Software reset code 0x01c0 ICSR 0x00000000 SP 0x20003578 Task MAIN Freestk 747 ok
Stack: 20000d10 00011ceb 20000d10 0001df61 00000000 00004008 20000d10 0001ded5 20000d0c 00004000 a5a5a5a5 a5a5a5a5 00000000 0001dd9d 00004000 00018b21 a5a5a5a5 00018b3d a5a5a5a5 00011b39 a5a5a5a5 a5a5a5a5 a5a5a5a5 a5a5a5a5 a5a5a5a5 a5a5a5a5 a5a5a5a5
Driver 0: position 331894, 859.0 steps/mm, standstill, SG min/max 0/496, read errors 0, write errors 0, ifcnt 19, reads 12002, writes 0, timeouts 0, DMA errors 0, steps req 109046 done 109046
Moves scheduled 6688, completed 6688, in progress 0, hiccups 0, step errors 0, maxPrep 498, maxOverdue 0, maxInc 0, mcErrs 0, gcmErrs 0
Peak sync jitter 4, peak Rx sync delay 214, resyncs 0, no step interrupt scheduled
VIN: 23.5V
MCU temperature: min 41.6C, current 66.4C, max 68.0C
Ticks since heat task active 204, ADC conversions started 2684508, completed 2684507, timed out 0
Last sensors broadcast 0x00000002 found 1 210 ticks ago, loop time 0
CAN messages queued 3626, send timeouts 0, received 4384, lost 0, free buffers 36, min 36, error reg 0
dup 0, oos 0, bm 0, wbm 0
=== Filament sensors ===
Interrupt 4 to 49us, poll 9 to 706us
Driver 0: pos 5.74, errs: frame 0 parity 0 ovrun 0 pol 0 ovdue 0

Phaedrux

Did it help with theunder extrusion?

Frederik

@Phaedrux i cant tell at the moment. with the new firmware my heater is going crazy

Screenshot (1).png

after 2-3 Minutes into the Print the Temp sensor starting to jump from 250 to 18-25 °C and my toolfan starts and stops accordingly to the temperature... when under 50°C it stops , above it starts.

Phaedrux

Sounds like a bad connection on the thermistor

Frederik

that was my first idea too, but when no print is running the temp is stable

Screenshot (2).png

Phaedrux

@Frederik said in Random underextrusion Problem:

but when no print is running the temp is stable

Yes, because when no print is running, the cables are stationary.

Frederik

@Phaedrux definetly not the cables

i resetted the Toolboard with the 2 knobs and restarted the same file:

Screenshot (3).png

absolute stable, nothing touched on the cables

Frederik

@Phaedrux but what i can tell about the under extrusion, it seems that the artefacts are gone

after this i will print the same Led_Bar.gcode from the last time,
where the Problem occured.

But it seems that the Print Quality is restored

This is a Picture where the Problem is better visible. It was switching between under and over extrusion in always the same intervals

Frederik

M122 at the end of the Print,
I have to print a bigger object to check if the Problem is gone

m122 b121
Diagnostics for board 121:
Duet TOOL1LC firmware version 3.3beta (2021-01-21 11:34:37)
Bootloader ID: SAMC21 bootloader version 2.2 (2021-01-16b1)
Never used RAM 3692, free system stack 0 words
Move 90 HEAT 91 CanAsync 66 CanRecv 74 CanClock 66 TMC 56 MAIN 205 AIN 62
Last reset 00:35:43 ago, cause: software
Last software reset time unknown, reason: OutOfMemory, available RAM 15632, slot 1
Software reset code 0x01c0 ICSR 0x00000000 SP 0x20003578 Task MAIN Freestk 747 ok
Stack: 20000d10 00011ceb 20000d10 0001df61 00000000 00004008 20000d10 0001ded5 20000d0c 00004000 a5a5a5a5 a5a5a5a5 00000000 0001dd9d 00004000 00018b21 a5a5a5a5 00018b3d a5a5a5a5 00011b39 a5a5a5a5 a5a5a5a5 a5a5a5a5 a5a5a5a5 a5a5a5a5 a5a5a5a5 a5a5a5a5
Driver 0: position 450451, 859.0 steps/mm, standstill, SG min/max 0/0, read errors 0, write errors 0, ifcnt 14, reads 831, writes 0, timeouts 0, DMA errors 0, steps req 0 done 0
Moves scheduled 9915, completed 9915, in progress 0, hiccups 0, step errors 0, maxPrep 0, maxOverdue 0, maxInc 0, mcErrs 0, gcmErrs 0
Peak sync jitter 3, peak Rx sync delay 183, resyncs 0, no step interrupt scheduled
VIN: 23.5V
MCU temperature: min 48.7C, current 69.2C, max 74.0C
Ticks since heat task active 57, ADC conversions started 2139229, completed 2139228, timed out 0
Last sensors broadcast 0x00000002 found 1 64 ticks ago, loop time 0
CAN messages queued 52, send timeouts 0, received 23, lost 0, free buffers 36, min 36, error reg 0
dup 0, oos 0, bm 0, wbm 0
=== Filament sensors ===
Interrupt 4 to 8us, poll 28 to 181us
Driver 0: pos 5.54, errs: frame 0 parity 0 ovrun 0 pol 0 ovdue 0

m122
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.3beta running on Duet 3 MB6HC v1.01 or later (SBC mode)
Board ID: 08DJM-956BA-NA3TN-6J9DL-3S46S-99AUT
Used output buffers: 1 of 40 (13 max)
=== RTOS ===
Static ram: 149784
Dynamic ram: 60768 of which 80 recycled
Never used RAM 140040, free system stack 139 words
Tasks: Linux(blocked,145) HEAT(blocked,299) CanReceiv(blocked,880) CanSender(blocked,346) CanClock(blocked,326) TMC(blocked,16) MAIN(running,922) IDLE(ready,20)
Owned mutexes: HTTP(MAIN)
=== Platform ===
Last reset 00:35:46 ago, cause: power up
Last software reset at 2021-01-31 18:05, reason: User, none spinning, available RAM 139964, slot 0
Software reset code 0x0012 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0x00000000 SP 0x00000000 Task Linu Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Aux1 errors 0,0,0
MCU temperature: min 47.4, current 50.1, max 50.5
Supply voltage: min 24.0, current 24.1, max 24.2, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 12.1, current 12.1, max 12.2, under voltage events: 0
Driver 0: position 111650, standstill, reads 1676, writes 23 timeouts 0, SG min/max 0/852
Driver 1: position -9570, standstill, reads 1676, writes 23 timeouts 0, SG min/max 0/1023
Driver 2: position 15080, standstill, reads 1677, writes 23 timeouts 0, SG min/max 0/868
Driver 3: position 0, standstill, reads 1677, writes 23 timeouts 0, SG min/max 0/862
Driver 4: position 0, standstill, reads 1677, writes 23 timeouts 0, SG min/max 0/877
Driver 5: position 0, standstill, reads 1686, writes 14 timeouts 0, SG min/max 0/0
Date/time: 2021-01-31 19:12:16
Slowest loop: 60.63ms; fastest: 0.03ms
=== Storage ===
Free file entries: 10
SD card 0 not detected, interface speed: 37.5MBytes/sec
SD card longest read time 0.0ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 125, maxWait 640640ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [1, 0, 70], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed moves 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters = 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamberHeaters = 2 -1 -1 -1
Heater 0 is on, I-accum = 0.4
Heater 1 is on, I-accum = 0.0
=== 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 doing "M190 S100" 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.
=== Filament sensors ===
Extruder 0: no data received
=== CAN ===
Messages queued 18772, send timeouts 22, received 26574, lost 102, longest wait 6ms for reply type 6029, peak Tx sync delay 16884, free buffers 48 (min 45)
=== SBC interface ===
State: 4, failed transfers: 0
Last transfer: 2ms ago
RX/TX seq numbers: 17148/17148
SPI underruns 0, overruns 0
Number of disconnects: 0, IAP RAM available 0x2d584
Buffer RX/TX: 56/1312-0
=== Duet Control Server ===
Duet Control Server v3.2.0
File:
Buffered code: M104 S250
Buffered code: M109 S250
Buffered code: M82 ;absolute extrusion mode
Buffered code: G1 Z15.0 F6000 ;Move the platform down 15mm
Buffered code: G1 X50 Y380 F3000
Buffered code: G92 E0
Buffered code: G1 F200 E35
Buffered code: G92 E0
Buffered code: M83 ;relative extrusion mode
Buffered code: G1 F2100 E-0.6
Buffered code: ;LAYER_COUNT:47
Buffered code: ;LAYER:0
Buffered code: M107
Buffered code: G0 F3600 X138.176 Y161.255 Z0.3
Buffered code: G1 F2100 E0.6
Buffered code: G1 F1500 X138.735 Y160.865 E0.03128
Buffered code: G1 X139.335 Y160.543 E0.03125
Buffered code: G1 X139.968 Y160.294 E0.03122
Buffered code: G1 X140.627 Y160.121 E0.03127
Buffered code: G1 X141.301 Y160.026 E0.03124
Buffered code: G1 X141.77 Y160.007 E0.02154
Buffered code: G1 X147.626 Y160.007 E0.26878
Buffered code: G1 X148.306 Y160.047 E0.03127
Buffered code: G1 X148.976 Y160.166 E0.03123
Buffered code: G1 X149.628 Y160.363 E0.03126
Buffered code: G1 X150.252 Y160.635 E0.03124
Buffered code: G1 X150.84 Y160.979 E0.03127
Buffered code: G1 X151.384 Y161.389 E0.03127
Buffered code: G1 X151.851 Y161.837 E0.0297
==> 1228 bytes
Code buffer space: 2784
Configured SPI speed: 8000000 Hz
Full transfers per second: 25.02
Maximum length of RX/TX data transfers: 3092/1456
File /opt/dsf/sd/gcodes/4x_glass_Bed_holder.gcode is selected, processing

OwenD

When you pid tuned the bed, did you put B0 in the result?
The new tuning hint leaves it off, so if you just copied that rather than using M500, it will default to bang bang.
Wouldn't have thought it'd affect that high up the print and you should see a cyclic temp variation, but worth checking.