Issues with print quality, wall surface rough.
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Sounds like you've tried a lot and you've got most things covered.
So the surface finish you're talking about is the slightly blobby look too it?
And this has persisted between a marlin controller and now to a Duet3?
Have you tried tuning pressure advance yet? https://duet3d.dozuki.com/Wiki/Pressure_advance
I would maybe try backing off your extruder pinch roller tension. Back the nut off to about half. There should be just a slight bite mark on the filament when you pull it out. May need to redo your E steps per mm.
Just in case, please provide the output of M122, your config.g, homing files, slicer start gcode, etc.
Are you using the duet 3 in standalone or Pi mode? Are you all up to date with 3.1.1?
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Yeah I would say maybe a bit blobby, inconsistent maybe?
I have played around with linear advance, and I really did not see much improvement.
The problem was nearly identical between marlin and duet, which made me very sad
I am running the duet with a pi and on 3.1.1
config.g
homeall.g
config-override.gHere is my start Gcode:
G28 ; home all axes
M290 Z0 R0 ; clear babystepping
G32 ; do the tango ; Wait for set temperatures to be reachedM116 P0 ; wait for tool 0 heaters to reach operating temperature
M83 ; relative extruder movement
; Purge line
T0
G1 Z2 F240
G1 X2 Y15 F3000
G1 Z0.28 F240
G92 E0.0
G1 Y220 E15.0 F1500.0 ; intro line
G1 X2.3 F5000
G1 Y15 E30 F1200.0 ; intro line
G92 E0.0
G29 S1
And M122
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.01-RC9 running on Duet 3 MB6HC v1.01 or later
Board ID: 08DJM-956L2-G43S8-6J9F4-3S86J-TA3QFUsed output buffers: 1 of 40 (10 max)
=== RTOS ===
Static ram: 154572
Dynamic ram: 162032 of which 76 recycled
Exception stack ram used: 528
Never used ram: 76008
Tasks: NETWORK(ready,2076) HEAT(blocked,1184) CanReceiv(suspended,3824) CanSender(suspended,1432) CanClock(blocked,1432) TMC(blocked,80) MAIN(running,2612) IDLE(ready,80)
Owned mutexes:
=== Platform ===
Last reset 01:05:33 ago, cause: power up
Last software reset at 2020-07-05 16:57, reason: User, spinning module LinuxInterface, available RAM 75912 bytes (slot 1)
Software reset code 0x0010 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0444a000 BFAR 0x00000000 SP 0xffffffff Task 0x4e49414d
Error status: 0
Free file entries: 10
SD card 0 not detected, interface speed: 37.5MBytes/sec
SD card longest block write time: 0.0ms, max retries 0
MCU temperature: min 26.8, current 44.0, max 46.1
Supply voltage: min 23.9, current 24.0, max 24.1, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 12.2, current 12.2, max 12.3, under voltage events: 0
Driver 0: standstill, reads 1815, writes 25 timeouts 0, SG min/max 0/1023
Driver 1: standstill, reads 1815, writes 25 timeouts 0, SG min/max 0/1023
Driver 2: standstill, reads 1816, writes 25 timeouts 0, SG min/max 0/1023
Driver 3: standstill, reads 1803, writes 38 timeouts 0, SG min/max 0/1023
Driver 4: standstill, reads 1804, writes 38 timeouts 0, SG min/max 0/1023
Driver 5: standstill, reads 1824, writes 18 timeouts 0, SG min/max 0/1023
Date/time: 2020-07-05 20:09:11
Slowest loop: 5.75ms; fastest: 0.14ms
=== Move ===
Hiccups: 0(0), FreeDm: 375, MinFreeDm: 348, MaxWait: 1412368ms
Bed compensation in use: mesh, comp offset 0.000
=== MainDDARing ===
Scheduled moves: 97, completed moves: 97, StepErrors: 0, LaErrors: 0, Underruns: 0, 0 CDDA state: -1
=== AuxDDARing ===
Scheduled moves: 0, completed moves: 0, StepErrors: 0, LaErrors: 0, Underruns: 0, 0 CDDA state: -1
=== Heat ===
Bed heaters = 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamberHeaters = -1 -1 -1 -1
Heater 0 is on, I-accum = 0.3
=== GCodes ===
Segments left: 0
Movement lock held by HTTP
HTTP* is ready with "M122" in state(s) 0 0, running macro
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
Autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 1.41ms; fastest: 0.01ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
HTTP sessions: 0 of 8- Ethernet -
State: disabled
Error counts: 0 0 0 0 0
Socket states: 0 0 0 0 0 0 0 0
=== CAN ===
Messages sent 15724, longest wait 0ms for type 0
=== Linux interface ===
State: 0, failed transfers: 0
Last transfer: 15ms ago
RX/TX seq numbers: 61548/61549
SPI underruns 0, overruns 0
Number of disconnects: 0
Buffer RX/TX: 0/0-0
=== Duet Control Server ===
Duet Control Server v3.1.1
HTTP:
Finishing macro bed.g, started by G32
Next stack level
Code buffer space: 4096
Configured SPI speed: 8000000 Hz
Full transfers per second: 18.90 - Ethernet -
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@Phaedrux Tried backing off the idler tension, more or less the same. Also, went from 220 to 240 half way through this cube, cant even tell.
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Other thing I would check is the titan bearings. They have a habit of failing.
At least we know that coming from a different controller and having the same issue makes it a mechanical problem. It seems like extrusion or x y motion, so you've only got a few avenues to chase down.
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@Phaedrux the titan is pretty new, how do I check the bearings? And all 3 I'm guessing? Should the smooth idle pulleys be an issue?
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Phaedrux is right that if changing the controller did not cause a change in the outcome it is most likely mechanical. I had hoped it would be noticeable from the video.
The only other thing is slicer. Have you tried any other ones or validated all the non-physics related settings are the same between the printer that doesn't do it and the Rat one?
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@Baenwort Yeah I agree, I was really hoping it was the board, because I had already changed so much out. I have tried prusaslicer, cura, and idea maker. All the same. It has to be mechanical right?? I'm running about 1200mm/s^2 for acceleration, and 60mm/s print speed, 600 jerk per min, I forgot the units lol.
What do you think? Extruder? I really don't want to buy another one but if it fixes it, at this point, idgaf. I'm willing to try pretty much anything at this point.
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Disassemble the Titan and check the bearings. See if they squeak or if they are leaking black lube. Usually pretty easy to tell if they have failed. It can happen pretty quickly if the spring tensioner is over tensioned.
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Have you tried printing with the part fan off to see if it still looks the same ?
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@Scachi yeah tried that too, no difference
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@Phaedrux Bearings all are good, no leaking or squeaking, turns smooth. He is a benchy, maybe you can see something in this.
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I think you’re fighting a couple issues. Looks to me like over extrusion and also a possible issue with part cooling.
Having to run your extrusion multiplier at 93% is an indicator that your over extruding. Temp and or E-step could be too high and causing this.
220c for PLA is on the high side. Would recommend trying lowering it to 200 even 190 and trying.
Also recommend recalibration your esteps. I’ve found it best to calibrate the esteps with the nozzle removed and the hotend temp at 0. You will want to remove the nozzle, set the temp at 0, and enable cold extrusion. Mark the filament at 150mm and extrude 100mm at 1mm/sec. Doing it this way I can run my extrusion multiplier at 100%.
Is there a different cooling fan setup for that hotend that you can try? The ducts that come with the 4010 fans are not ideal and it looks like it’s blowing right on your hotend and the heater is having issues with keeping the temp consistent. This is evident at the tops and bottoms of the letters in the cube. Recommend finding a way to focus the airflow and direct it down a little so the air is not on the heat block. Having to print at 220 is also an indicator that you part cooling is actually cooling the heat block and you’re having to increase the temp to compensate.
Just a couple ideas of things to try. Hope it helps.
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@mwolter I will try a lower temp right now, and I'll double check my esteps. That hot end is my personal hot mess lol, maybe I can design some fan ducts tho. No fan doesn't seem to help tho
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@mwolter I checked my esteps without the nozzle, dead on. Here is a print at 195C:
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Looks better, the layers are more consistent but would be good to do a temp tower test.
The issues at the top and bottom of the letters are still present. Have a feeling this due to the fan ducts. Seems like the cooling for the plastic isn't enough but it's also affecting the heat block temp. Printing a four-wall cube (no top or bottom) in vase mode that has no letters and solid walls would help to isolate the cooling issue.
Would also be good to tune Pressure Advance once the other issues are resolved.
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@mwolter I'll try a temp tower, Ill have to look up how to do that in idea maker. Yeah I'll have to do something with the fans. That might take me awhile lol. I tried printing a cube at 220 and 107% flow, just to show I guess? Anyway:
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To me, the 220 107% print is bulging and looks melted. Like a marshmallow.
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I had a similar issue on a machine that showed vertical walls like in your picture. In my case, my extruder current was my issue. I increased my current from 600mA to 800mA in config.g and that took care of the weird striping issues. I'm assuming the backpressure inside the nozzle caused it to over/under extrude on a regular basis creating the bulging.
It's an easy test to increase your extruder motor current and then print again. Just something I've experienced with similar results as in your picture.
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Have you PID tuned the bed and hot end heaters?
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@PDBeal I will try that when I get home!
