It's it possible to "dumb down" the magnetic filament sensor
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I'm building a new machine and purchased 2 of the mag filament sensors - not realizing exactly how they work. I had thought they were like others and just generally sensed that things were still moving. But once I looked into the configuration I see that they are in fact trying to closely quantify how much filament is moving through the sensor. Is there a way to configure it so that it works more like I had, wrongly, assumed it worked?
The problem is that, for reasons I won't get into and cannot change at this point, I cannot mount the sensor directly before the extruder. Instead they will be mounted on the side of the printer. Filament will go through the sensor then through over 1.5 meters of PTFE to the tool - I think that I could just configure it to have a very loose tolerance for measurement but am unsure if that will work. I was hoping there was just a "dumb mode" that basically just looked for the fact that it was still rotating.
Any way to do that? -
@adammhaile said in It's it possible to "dumb down" the magnetic filament sensor:
I was hoping there was just a "dumb mode" that basically just looked for the fact that it was still rotating.
Use wide tolerances. In addition, increment the detection length.
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There have been some significant enhancements in the last few releases with regard to the magnetic filament monitor.
Update to something @dc42 recommends.
Also, make sure your AGC value read back from the sensor is in the 50 to 105 range.
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@infiniteloop said in It's it possible to "dumb down" the magnetic filament sensor:
Use wide tolerances. In addition, increment the detection length.
So do something like this?
M591 D0 P3 C"io4.in" S1 R50:150 L24.8 E50.0@alankilian said in It's it possible to "dumb down" the magnetic filament sensor:
Update to something @dc42 recommends.
I patiently await input from the Duet master
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@adammhaile said in It's it possible to "dumb down" the magnetic filament sensor:
So do something like this?
Yes. For just sensing filament-out, R can be set to an even wider range, e.g.
R10:200- if necessary. You have to test that with your setup, I can't tell from here how far the sensor deviates from what the extruder does at the other end of 1.5 meters of PTFE.Just a note of caution: if you print the sensor housings, check the mechanics - the stl files were designed with a resin printer in mind. Our machines are not as precise as those, so some cutting, filing and/or sanding will be required until all moving parts move as intended.
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@infiniteloop said in It's it possible to "dumb down" the magnetic filament sensor:
Just a note of caution: if you print the sensor housings, check the mechanics - the stl files were designed with a resin printer in mind. Our machines are not as precise as those, so some cutting, filing and/or sanding will be required until all moving parts move as intended.
Ah - good to know. Thanks! I definitely did FDM print them. Though at 0.1mm layers so hopefully it'll be fine?
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@adammhaile said in It's it possible to "dumb down" the magnetic filament sensor:
Though at 0.1mm layers so hopefully it'll be fine?
With a resin printer, you easily get 10 times the accuracy
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@infiniteloop said in It's it possible to "dumb down" the magnetic filament sensor:
@adammhaile said in It's it possible to "dumb down" the magnetic filament sensor:
Though at 0.1mm layers so hopefully it'll be fine?
With a resin printer, you easily get 10 times the accuracy
Oh, I know - but I don't have one and am just being hopeful it will work
The docs also show an FDM case, so I figure it should work with some tweaking. -
@adammhaile My FDM cases work just fine.
Remember to read the AGC and sand the case until you get it in the correct range.
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@adammhaile It will work, I've FDM-printed a housing myself. It just doesn't work out of the box, some tweaking is required - so what …
