Help - long print and getting too little movement error

charlesmc

I'm on layer 249 of a 900 layer print. The print ran for hours, but got a too little movement error overnight and then that error has been increasing throughout the day. I just hit unpause each time to get the print going again.

I had not used my 3D printer in a long time prior to a test print just before this larger print. I upgraded the firmware (Duet 3 mini 5) to 3.4.6 and I turned the filament sensor back on using the following command. I did not have issues with the test print and therefore thought that I was good to go with larger print.

M591 D0 P3 C"io2.in" S2

When I run M591 D0 in the console right now, I get:

Duet3D rotating magnet filament monitor v3 on pin io2.in, enabled, sensitivity 28.80mm/rev, allow 60% to 160%, check printing moves every 3.0mm, version 3, mag 131 agc 87, measured sensitivity 24.93mm/rev, min 97% max 103% over 534.4mm

Can I send another M591 D0 P3 C"io2.in" S2 L20:200 command through the console to update the filament monitor setting while the print is running? Or is that going to derail things?

Thanks for your help!

fcwilt

@charlesmc

Try it without the P, C or S parameters.

I don't know for sure it will be OK so you may wish to check with @dc42.

Frederick

charlesmc

Just sent M591 D0 L30:200

Just got back...so that didn't update it

	M591 D0
Duet3D rotating magnet filament monitor v3 on pin io2.in, enabled, sensitivity 30.00mm/rev, allow 60% to 160%, check printing moves every 3.0mm, version 3, mag 132 agc 87, measured sensitivity 24.93mm/rev, min 97% max 103% over 2113.6mm

fcwilt

@charlesmc

I cannot find the docs discussing where L has two values as you are using.

The sensitivity report back was different going from 28.80 to 30.00.

What are you trying to change?

Frederick

charlesmc

Ack...I screwed up the command that I posted above. I just sent a new command down and it correctly updated the range to 30% to 200%.

M591 D0 P3 c"io2.in" L28.4 R30:200

fcwilt

@charlesmc

Hopefully your print will now finish without stopping.

Frederick

charlesmc

I ended up sending

M591 D0 P3 C"io2.in" L24.93 R30:200 S1 A0

However, I'm still periodically getting too little movement errors. Looks like I'm dipping down below 30%. In the below instance, I caught the system dipping down to 48%.

Duet3D rotating magnet filament monitor v3 on pin io2.in, enabled, sensitivity 24.93mm/rev, allow 30% to 200%, check printing moves every 3.0mm, version 3, mag 132 agc 87, measured sensitivity 24.98mm/rev, min 48% max 103% over 816.4mm

My whole objective with the filament monitor is to just detect the end of the spool, so that the system can pause, I can load up more filament, and keep on going.

But it has too many false positives to be useful.

fcwilt

@charlesmc

I tried that kind but was not in the mood to get it "fine tuned" - so I just installed a simple TriangleLab's unit which is just a microswitch mounted in a nice little case with status LEDs.

TL Filament Runout Sensor

Frederick

charlesmc

Triangle sensor ordered thanks!