Rotating Magnetic Sensor - Keeps Pausing Printer

[wouldstain]

@T3P3Tony @dc42

Just received this from the attached print:

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 75, measured sensitivity 27.29mm/rev, min -1% max 109% over 406.5mm

I'm guessing the negative percentage indicates a retraction?

Cone_threaded.stl

[T3P3Tony]

@wouldstain thanks. I have found a section of a short print file that gives repeatable bad results.

It would be helpful to try the cone print but better if you attached the sliced gcode than the stl file and my slicing settings will be different.

[wouldstain]

@t3p3tony
Oops! I had passed it directly from Prusa to the printer w/o saving as a file...

here you go!

Cone_threaded.gcode

[wouldstain]

@t3p3tony

It occurs to me that this could be part of a broader issue I had encountered prior to installing the MFM.

In short, I was experiencing what appeared to be over-advancement on the extruder. This would often result in filament being ground in the extruder to the point where it would no longer feed leading to an eventual clog in the hotend and even in the throat.

I worked with @3lemental to tune the M92 E-value (went from 837 to 814) which yielded some improvement but did not completely resolve the issue.

Installing the MFM lead to a drastic improvement (no more clogs or ground filament!) but these pauses may be related. Since this was no longer ruining print jobs, I sort of placed the issue on the back burner.

I don't know if it's appropriate to this thread but I have more detail on what steps I had / have taken so far on this.

Just let me know if you would like me to post it here or elsewhere.

[T3P3Tony]

@wouldstain Probably better to start a new thread on that, thanks.

[dc42]

I have put new 3.4beta5+1 binaries at https://www.dropbox.com/sh/xeu30go894p9xbs/AAB5U66SH4wbjKIcX0snUbKxa?dl=0. These fix a bug that was giving me consistently poor results from the filament monitor on the drywall-anchor print. This particular bug was either introduced or made worse in version 3.4beta2. The particular instance that triggered it was a very short extruder move, less than one microstep long. This means that it would have occurred more often on machines with low extruder steps/mm.

Use these binaries with caution, because I have done only small test prints with the Duet 2 binary, basic movement tests with the Duet 3 binary, and I have not yet tested the Duet 3 Mini or Maestro binaries.

These binaries also include the race condition fix that may have caused occasional incorrect results from the filament monitor in firmware 3.3 and earlier versions.

[A Former User]

@dc42 said in Rotating Magnetic Sensor - Keeps Pausing Printer:

I have put new 3.4beta5+1 binaries at https://www.dropbox.com/sh/xeu30go894p9xbs/AAB5U66SH4wbjKIcX0snUbKxa?dl=0. These fix a bug that was giving me consistently poor results from the filament monitor on the drywall-anchor print. This particular bug was either introduced or made worse in version 3.4beta2. The particular instance that triggered it was a very short extruder move, less than one microstep long. This means that it would have occurred more often on machines with low extruder steps/mm.

Use these binaries with caution, because I have done only small test prints with the Duet 2 binary, basic movement tests with the Duet 3 binary, and I have not yet tested the Duet 3 Mini or Maestro binaries.

These binaries also include the race condition fix that may have caused occasional incorrect results from the filament monitor in firmware 3.3 and earlier versions.

I'll give it a try with the same gcode I've posted earlier and I'll let you know... just for info my printer uses two bondtech BMG extruders so I haven't configured a low step/mm for them

[A Former User]

@dc42 said in Rotating Magnetic Sensor - Keeps Pausing Printer:

I have put new 3.4beta5+1 binaries at https://www.dropbox.com/sh/xeu30go894p9xbs/AAB5U66SH4wbjKIcX0snUbKxa?dl=0. These fix a bug that was giving me consistently poor results from the filament monitor on the drywall-anchor print. This particular bug was either introduced or made worse in version 3.4beta2. The particular instance that triggered it was a very short extruder move, less than one microstep long. This means that it would have occurred more often on machines with low extruder steps/mm.

Use these binaries with caution, because I have done only small test prints with the Duet 2 binary, basic movement tests with the Duet 3 binary, and I have not yet tested the Duet 3 Mini or Maestro binaries.

These binaries also include the race condition fix that may have caused occasional incorrect results from the filament monitor in firmware 3.3 and earlier versions.

Good news so far!

I've reprinted the same gcode and it went all ok!

M591 D0
Duet3D rotating magnet filament monitor v3 on pin e0stop, enabled, sensitivity 24.78mm/rev, allow 60% to 130%, check every 3.0mm, version 3, mag 131 agc 65, measured sensitivity 24.54mm/rev, min 95% max 112% over 1356.0mm

so far so good!

More tests will follow!

Thank you guys for your effort!

EDIT:
It doesn't work anymore the Telegram bot I use to have all the printer notifications...have you changed something?

[T3P3Tony]

@thedragonlord said in Rotating Magnetic Sensor - Keeps Pausing Printer:

It doesn't work anymore the Telegram bot I use to have all the printer notifications...have you changed something?

best to start a new thread on that

[A Former User]

@t3p3tony said in Rotating Magnetic Sensor - Keeps Pausing Printer:

@thedragonlord said in Rotating Magnetic Sensor - Keeps Pausing Printer:

It doesn't work anymore the Telegram bot I use to have all the printer notifications...have you changed something?

best to start a new thread on that

Ok, I wrote here because the issue started this morning after the installation of the last pre beta

[A Former User]

@dc42 said in Rotating Magnetic Sensor - Keeps Pausing Printer:

I have put new 3.4beta5+1 binaries at https://www.dropbox.com/sh/xeu30go894p9xbs/AAB5U66SH4wbjKIcX0snUbKxa?dl=0. These fix a bug that was giving me consistently poor results from the filament monitor on the drywall-anchor print. This particular bug was either introduced or made worse in version 3.4beta2. The particular instance that triggered it was a very short extruder move, less than one microstep long. This means that it would have occurred more often on machines with low extruder steps/mm.

Use these binaries with caution, because I have done only small test prints with the Duet 2 binary, basic movement tests with the Duet 3 binary, and I have not yet tested the Duet 3 Mini or Maestro binaries.

These binaries also include the race condition fix that may have caused occasional incorrect results from the filament monitor in firmware 3.3 and earlier versions.

I can confirm that the sensor issues has been solved by your FW patch...I've made several small prints and one large prints in dual material using both the sensors and I had no problem at all

Thanks again

[T3P3Tony]

@thedragonlord thanks for your help in working through this and providing some test prints. Can you confirm your filament monitor settings, PA settings and what filament monitor results you are now getting.

@wouldstain have you had any success with the new builds yet?

[A Former User]

@t3p3tony said in Rotating Magnetic Sensor - Keeps Pausing Printer:

@thedragonlord thanks for your help in working through this and providing some test prints. Can you confirm your filament monitor settings, PA settings and what filament monitor results you are now getting.

@wouldstain have you had any success with the new builds yet?

Monitor settings:

M591 D0 P3 C"e0stop" R60:300 L24.78 E3.0 S1
M591 D1 P3 C"e1stop" R60:300 L24.67 E3.0 S1

PA Settings for PLA:

M572 D0 S0.45 ; Pressure Advance
M572 D1 S0.45 ; Pressure Advance

PA Settings for PETG:

M572 D0 S0.75 ; Pressure Advance
M572 D1 S0.75 ; Pressure Advance

I alway get results around 95-98% as minimum

[wouldstain]

@dc42 Duet2Combined.bin for Duet2 Wifi?
Also, what is the .map file? Is that something I need?

Thank you!

[T3P3Tony]

@wouldstain you can ignore the map file. This is a build of RRF 3.4b5+1, are you running 3.4b5 already? If so then you can just update to this version using the Update system files in DWC->System. If you are not then please update to 3.4b5 first (DWC as well as RRF)

[T3P3Tony]

@alankilian if you have a chance to try the new version that would also be helpful, thanks.

[alankilian]

@t3p3tony I'm on 3.2.

Can you send me the upgrade instructions and links to the revisions I should install?

I've got a 30-minute test print that fails so I can test quickly.

[T3P3Tony]

@alankilian thanks, if you are happy to make the upgrade then please follow the following steps.

First upgrade to 3.3:

• download the Duet2and3Firmware-3.3.zip file from https://github.com/Duet3D/RepRapFirmware/releases/tag/3.3
  and use "system" -> "upload system files to upload it. it will prompt you to install the updates say yes.
• Assuming that all goes as expected DWC should reload and you should see 3.3 versions reported for DWC and RRF in the General and Machine Specific tabs in DWC.
• To get around a issues with future upgrades (we switched from /sys/ to /firmware for firmware binaries between 3.2 and 3.3) the best thing is to re- upload the Duet2and3Firmware-3.3.zip again at this point. you don't need to re-install the updates. this just ensures stuff is in the right place for future upgrades.

Second upgrade to 3.4b5

• get the Duet2CombinedFirmware.bin and DuetWebControl-SD.zip files from here: https://github.com/Duet3D/RepRapFirmware/releases/tag/3.4.0beta5
• Upload the firmware binary first and say yes to install the update. then upload the SWC zip.
• check that the firmware and DWC are now reported as being 3.4b5

Finally upgrade to the 3.5b5+1

• Get the Duet2CombinedFirmware.bin from the dropbox link posted earlier. There is no updated DWC.
• uploaded it as in the previous step, say yes to the update
• the Machine specific tab/M115 should report 3.4.0beta5+1 (2021-10-29)

[alankilian]

@t3p3tony

Board: Duet 2 Ethernet (2Ethernet)
Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 3.4.0beta5+1 (2021-10-28)

Started a print and almost immediately I got "To much movement"

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 133 agc 114, measured sensitivity 16.39mm/rev, min 100% max 100% over 12.0mm

Resumed and checked again:
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 132 agc 114, measured sensitivity 25.89mm/rev, min 94% max 102% over 78.4mm

Printing completed.
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 132 agc 114, measured sensitivity 25.82mm/rev, min 94% max 103% over 1697.9mm

[alankilian]

Second try: Too little movement:

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 114, measured sensitivity 26.55mm/rev, min 2% max 105% over 118.3mm

Since my AGC is almost at the high limit, I'll do a little sanding to improve it and try again on Monday.