Rotating Magnetic Sensor - Keeps Pausing Printer

wouldstain

Drywall anchor @ 250C:

Duet3D rotating magnet filament monitor v3 on pin e0stop, enabled, sensitivity 26.50mm/rev, allow 1% to 200%, check every 3.0mm, version 3, mag 130 agc 75, measured sensitivity 219.24mm/rev, min 6% max 128% over 19.5mm

only got about 2% into it before stopping.

PLA_250C_Drywall_Anchor.gcode

FYI also have PETG printing at -.15 offset via babysteps so I did reset it for PLA.

alankilian

@wouldstain

My printer has (0,0) in the center.
Is there an easy way for me to provide an offset so I can try printing your .gcode?

Or can you slice it centered on (0,0) for me to test with?

wouldstain

@alankilian
Not sure how that would be possible as slicer is set up for my railcore rig.
Center is somewhere around 150,150.

wouldstain

@t3p3tony Ran another print at 195C just to test.
got about 60% through it then stopped:

m591 d0
Duet3D rotating magnet filament monitor v3 on pin e0stop, enabled, sensitivity 26.50mm/rev, allow 1% to 200%, check every 3.0mm, version 3, mag 130 agc 75, measured sensitivity 28.51mm/rev, min -25% max 130% over 132.7mm

T3P3Tony

@alankilian

@dc42 used this to offset the prints so they can br printed with e bed centered on 0,0

; Remove the following line if your bed isn't centred on X0 Y0
G10 L2 P1 X-150 Y-150

offsets the coordinate system by 150mm in both X and Y.

Use with caution!

T3P3Tony

@wouldstain thanks for the reports.

Can you confirm the changes between PETG and PLA in your setup:

Print temperature (don't think this matters as long as prints are working)
Print Speed?
Retraction distance (looks like 2mm in both files)?
PA setting? (looks like PLA = M572 D0 S0.06, PETG = M572 D0 S0.07?)
Anything else?

Cheers

alankilian

@t3p3tony

Thanks for the offset infor.

Neither Sinplify3D nor my online GCODE viewer pay attention to G10, so I was unable to figure it out myself.

Printing PLA at 210C I get:

Duet3D rotating magnet filament monitor v3 on pin e0stop, enabled, sensitivity 28.80mm/rev, allow 60% to 160%, check every 3.0mm, version 3, mag 130 agc 117, measured sensitivity 24.51mm/rev, min 94% max 113% over 171.5mm

T3P3Tony

@wouldstain tested this on a Duet 2 with my current config:

Duet3D rotating magnet filament monitor v3 on pin e0stop, enabled, sensitivity 24.78mm/rev, allow 0% to 150%, check every 3.0mm, version 3, mag 132 agc 60, measured sensitivity 24.58mm/rev, min 96% max 110% over 190.2mm

Finished printing file 0:/gcodes/pla_250c_drywall_anchor.gcode, print time was 0h 14m

T3P3Tony

@wouldstain and now with your config (except for removing the bits that don't apply to the test rig):

Duet3D rotating magnet filament monitor v3 on pin e0stop, enabled, sensitivity 26.50mm/rev, allow 1% to 200%, check every 3.0mm, version 3, mag 131 agc 60, measured sensitivity 24.52mm/rev, min 95% max 111% over 190.2mm

Finished printing file 0:/gcodes/pla_250c_drywall_anchor.gcode, print time was 0h 14m

That is with a Hermera. I will switch back to the titan as well for a further test.

T3P3Tony

@wouldstain and now with the Titan:

Duet3D rotating magnet filament monitor v3 on pin e0stop, enabled, sensitivity 26.50mm/rev, allow 1% to 200%, check every 3.0mm, version 3, mag 129 agc 59, measured sensitivity 23.78mm/rev, min 95% max 106% over 180.9mm

Finished printing file 0:/gcodes/pla_250c_drywall_anchor.gcode, print time was 0h 14m

So can't reproduce this with your setup on my extruders. can you do me a favour and print a PETG print (the drywall anchor) and then print the PLA print (same as before) without making changes in between other than temperature an PA as needed and see if you get the differences you have seen earlier between PETG settings and PLA.

wouldstain

@T3P3Tony

Ran this using a different spool of PETG only because its what I had loaded this morning (Atomic Starry Night).

Temp
PETG: 235 start, 230 other layers
PLA: 235 start, 230 other layers
Print Speed:
PETG: 60 perim / 80 infill
PLA: 60 perim / 80 infill
Retraction settings:
PETG: 7mm / 25mm/sec
PLA: 2mm / 25mm/sec
PA settings (in this instance):
PETG: .06
PLA: .07
Z offset for PETG = -.15

Really not a lot of difference.

I have tried adjusting all of the above settings when printing with PLA with no improvement.

wouldstain

@wouldstain Was actually able to successfully print a drywall anchor in both PETG and PLA using the PETG setting (including Z offset) however, was unable to complete 20mm calibration cube in PLA using same settings.

T3P3Tony

@wouldstain ahh ok the difference I missed in original PETG file you shared was the 7mm retractions, however the 2mm on PLA is working well in my tests.

Would be good to see the actual results reported by M591 for the PETG and PLA drywall prints that worked and the PLA cube that did not.

wouldstain

@wouldstain

had a couple successful PLA prints on the drywall anchor using the PETG settings.
1x1, 1x2. failed on 2x3.

Duet3D rotating magnet filament monitor v3 on pin e0stop, enabled, sensitivity 26.50mm/rev, allow 1% to 200%, check every 3.0mm, version 3, mag 130 agc 75, measured sensitivity 26.60mm/rev, min -30% max 111% over 443.4mm

there does not seem to be any rhyme or reason to it.

I am going to switch back to PETG as I have something else I need to print.

BTW I've had the same problem with several different spools of PLA from different manufacturers.

I had been experiencing this with PETG but far less frequently but have not had an occurrence since installing the beta+1 version as instructed.

Just to make things more interesting, I'm seeing this in the console in several locations:

G28
Error: G0/G1: insufficient axes homed
File 0:/gcodes/Drywall_Anchor_PLA_2x3_Test.gcode selected for printing

i tested and verified that the endstops are working.

Please let me know what to try next.

alankilian

I've been printing a few smallish things the last couple of days and it seems that the magnetic filament monitor is really working for me now!

Duet3D rotating magnet filament monitor v3 on pin e0stop, enabled, sensitivity 28.80mm/rev, allow 60% to 160%, check every 3.0mm, version 3, mag 130 agc 119, measured sensitivity 25.90mm/rev, min 96% max 104% over 3793.7mm

Thanks for working on this again.

I can do test-prints if anyone has suspicious files.

wouldstain

@t3p3tony
I'll run them again once the current job completes.

Is there a way to get any sort of verbose logging out of the duet board? I can telnet to it or connect a USB cable. It would be interesting to get detailed state info leading up to this.

T3P3Tony

@wouldstain I don't think there is much more infor available from the logging. What would be good is cutting down the print (you can run it above the bed rather than as an actual print) to just a layer to two that triggers the 0/-'ve results.

dc42

@wouldstain do you still get the problem if you print with PLA using exactly the same settings as as you did for the successful PETG print, apart from temperatures? In particular, using the same pressure advance and retraction settings, if your hot end can handle that when using PLA.

wouldstain

@dc42 @T3P3Tony
I've tried printing the same model, only swapping out the filament between prints and re-running the same job. I've tried adjusting only the temp. I've tried changing and not changing retraction settings. I've tried adjusting and not adjusting z-offset when switching.

I've also tried printing PLA with the PA set to zero with 2/25 retraction.

I've had no problems printing small TPU jobs (I'd be happy to print something larger to let it run if you think it would be helpful)

I have not printed ABS recently but I can if you think it would be worth testing.

I'm using am E3Dv6 / Bondtech BMG extruder so it's a pretty standard set up.
I've also replaced the short and long bowden tubes, throat and nozzle as well as pulling apart the extruder and cleaning it.

I'm inclined to think that this is not an issue with the MFM and that the MFM is just a symptom. I have not seen a repeat of the issue with PETG yet on things like the drywall anchor. Previously, I had only been able to print one at a time. I've tested as many as 6. Sadly, I don't need that many drywall anchors at the moment but It's good to know I have them if i need them!

I had mentioned this previously and @T3P3Tony suggested a new thread. I will open one shortly.

wouldstain

@t3p3tony

As soon as the print pauses, I can either resume or drop the bed and have it do an extrude with no issues. I'm able to successfully resume printing for the most part in either case until it happens again.