25.95mm/rev, min -33% max 162% over 9615.6mm

nuroo

New Setup

=== Filament sensors ===
Extruder 0: pos 188.09, ok, measured sens 24.89mm/rev min 95% max 103% over 1015.3mm, errs: frame 0 parity 0 ovrun 0 pol 1 ovdue 0

M591 D0
Duet3D rotating magnet filament monitor v2 on input 3, disabled, sensitivity 24.80mm/rev, allow 70% to 130%, check every 3.0mm, current pos 44.6, measured sensitivity 24.90mm/rev, min 95% max 103% over 1021.3mm

much better numbers, but will I get false positives when I enable sensor?
M591 D0 P3 C3 S1 R100:110 L24.90 E3.0 ;

nuroo

2 successful prints, no false positives with new setup.

M591 D0 P3 C3 S1 R90:110 L24.96 E3.0 ;

now to try a real filament outage

themelle

@nuroo Congratulations on getting it to work as intended!

Now I'm left alone again with my "frame errors"/"sensor has stopped working" problem.
May try to send it back to Filastruder as I am out of ideas now

T3P3Tony

@nuroo said in 25.95mm/rev, min -33% max 162% over 9615.6mm:

Well ok. I need to make an extension and try again. I wish this requirement was noted to customer on product page or wiki. I'll report back.

I am glad you got it working and thanks for the feedback, i have updated the installation section of the documentation to note the requirement: https://duet3d.dozuki.com/Wiki/Duet3dFilamentMonitor_RotatingMagnetVersion#Section_Installation

@themelle i think asking filastruder to swap it will be a good test to see if this is a board that passed testing but is marginal in your setup.

themelle

@t3p3tony Thanks for your honest feedback.
May I direct Filastruder support to your post confirming a warranty swap?

T3P3Tony

@themelle yes

themelle

@t3p3tony Thank you!

nuroo

Well I thought I was good to go with correct setup.
2 small 1 hour long prints no false positives. 11hour print - false trigger to little movement, about 5 hours in. Had to disable sensor so I didn't have to sit there having to keep resuming print.

nuroo

Are there any other troubleshooting measures I could try?

themelle

@nuroo I got my sensor swapped as it seemed to be faulty. Since then I have been getting much better values - but I am running 70-130% allowed movement to compensate for spike values.
Maybe you also should loosen the grip a little bit

nuroo

@themelle good to hear they swapped yours out. Figured I'd give the sensor another look.

I love that you can gather data while not actually having the printer stop.
Im current running:
M591 D0 P3 C3 S0 R85:115 L25.12 E3.0 (which worked on shorter prints)

S0 - disable filament monitoring.

So with my current longer print I did:
M591 D0
Duet3D rotating magnet filament monitor v2 on input 3, disabled, sensitivity 25.12mm/rev, allow 85% to 115%, check every 3.0mm, current pos 210.9, measured sensitivity 24.33mm/rev, min 1% max 110% over 6134.2mm

The high side range seems ok. Max I got is 110% but room for error still with 115%.
That min 1% is strange?? It would have surely triggered a pause had filament monitoring been enabled. But I have moved the sensor location as suggested. It reminds me of the min -33% I got starting this thread.

How do I over margin min 1% or min -33% so that these results are within good range?
For min 1% do i enter 0%? ie (M591 D0 P3 C3 S1 R0:115)??
For min -33% do i enter -40%? (M591 D0 P3 C3 S1 R-40:115)??
Can your algorithm handle such low values?
Do these low values still point to an issue with my setup?

themelle

@nuroo Please look out for frame errors reported by M122.
They went away with my replaced monitor, and so did the ultra-low min-values it got before.