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Best posts made by jchodakowski
Latest posts made by jchodakowski
RE: Magnetic sensor dead?
After a power cycle it behaves "normally" in that it flashes green, starts communicating with the duet. A M591 D0 asap yields this:
Duet3D magnetic filament monitor on input 3, enabled, sensitivity 25.20mm/rev, allow 70% to 140%, check every 3.0mm, version 3, mag 132 agc 89, no calibration data
However when a print actually starts (warmups done) the system will immediately report an error from the sensor and the print never starts. Filament never even moves.
Magnetic sensor dead?
So, was working last night. Woke up this morning, started a print and it immediately paused, with a sensor error. M591 D0 yielded this:
Duet3D magnetic filament monitor on input 3, enabled, sensitivity 25.20mm/rev, allow 70% to 140%, check every 3.0mm, version 3, mag 132 agc 89, error 4
I power cycled and the error 4 went away but the monitor still pauses the print. I've disassembled the monitor and it looks mechanically sound. Led flashes seem normal - I've not checked for error codes specifically.
RE: Fine tuning the Magnetic Filament Monitor
If I'm not mistaken that unit has older firmware on it? Should ideally be version 3 to start... the report will then tell you more about "how" sensitive it is:
Duet3D magnetic filament monitor on input 3, enabled, sensitivity 25.20mm/rev, allow 70% to 130%, check every 3.0mm, version 3, mag 133 agc 93, no calibration data
(mine hasn't gone anywhere today) what's important there are the mag and agc values. Knowing those lets you know if you're in a good bracket to start with (I had to modify my sensor housing a little) and once I got in a good reading realm, the data was more accurate and I had fewer if any false stops
Questions on the magnetic filament monitor
From time to time my prints will pause early on because I get a "no response received from filament sensor" (or somesuch message). When I try a M591 D0 it always responds and has data so I resume the print and everything is fine.
My mag is 132 and my agc is 106 - I understand the agc should normally be a little lower. Should I open this up and try to improve tension on the grub or are these numbers ok?