Mag Filament sensor - config clarification.

Garfield

Guess I need to experiment - if you connect the switch to the filament sensor I don't see the point wasting an input on the Duet itself - better to use something virtual if absolutely necessary but not consuming physical IO that you don't physically connect to - that's just plain nuts.

droftarts

@Garfield I don't understand what you are concerned about! You connect the filament runout microswitch (eg something like https://www.thingiverse.com/thing:4100594 if you're unfamiliar with the concept) to the SW pins on the magnetic filament sensor. The magnetic filament sensor sends the microswitch output, along with it's own, to the Duet on the pin it's already connected to. How is that wasting an input?! It's not either/or; you get both on one input.

You can have a filament runout sensor on its own, without the magnetic filament sensor, but then it won't pick up all the print failure modes that the magnetic filament sensor will. The SW input on the filament sensor just gives you extra choice/information, with no increase in pin usage.

Ian

Garfield

So I don't need the 'C' option ..... or is the C actually the pin that it uses for communication and NOT the filament out switch - that's more logical I guess.

The use of pin names like endswitch don't really describe the purpose that this pin will serve - it isn't as a digital switch or an analog input but a communication channel

dc42

@Garfield said in Mag Filament sensor - config clarification.:

or is the C actually the pin that it uses for communication

Yes, it's the pin on the Duet that the filament monitor is connected to.

TeddyFluffkins

@Garfield @dc42
Can any of you clarify on the correct wiring for a Duet 3?
I have mine connected as follows:
Sensor - Duet
3.3V to 3.3V
GND to GND
OUT to IO_6.in

According to the dozuki you need to use a cross-over connection, however in my uneducated mind that doesn‘t really makes any sense?
I tried putting GND to IO_6.in and OUT to GND but got no response from the Sensor as well....

„No data received“

M591 D0
Duet3D rotating magnet filament monitor v1 on pin io6.in, enabled, sensitivity 24.80mm/rev, allow 70% to 130%, check every 3.0mm, no data received

Any advice is greatly appreciated!

Garfield

You don't need any crossover - at least with version 1.7a all is as per your explanation and is exactly how I wired mine. I do agree that the instruction is confusing, the text reads as though prewired cables are in use. I tested mine before committing to crimping connectors.

This is my definition

M591 D0 P3 C"io5.in" S1 R80:120 L25.49 E3.0

For a filament run out switch wire it only to the filament sensor, the status is available via the sensor communications connection although I don't use it.

I think that it is all to do with the way the plugs are reversed on the PCB but since you're wiring it all I don't see that the pin numbers matter - just pay heed to the way around the plug goes and make sure ground goes to ground and so on.

Watch the LED ... this will let you know if it is talking.

Note - the no data received only changes during a print ...

TeddyFluffkins

@Garfield Thanks for the heads up!

However, despite being wired correctly (according to your wiring...the only one that really makes any sense shrug) its not working.
The LED on the sensor does NOT light up when extruding filament.
The print stops after priming with the error message „extruder 0 reports too little movement“ (or something like that)
I tried io6, io8 and io5.
My wiring again is as follows:

Sensor - Duet 3
PIN OUT to io5.in
PIN 3.3V to 3.3V on io5
PING GND to GND on io5

The „no data received“ message on M591 D0 stays the same, always. While idle and while priming.
I tested my wires, those should be OK. (Give a beep when using a multimeter to test)

This is my M591 from config.g

code_text
;Filament sensor
M591 D0 S1 P3 C"io5.in" R70:130 L24.8 E3.0						; Duet3D magnetic filament sensor cross-connected to io5.in```

I‘m out of ideas.```

Garfield

Not sure what I can add except

Red is 3.3, Blue is Gnd

IMG_0357[1].png

IMG_0358[1].png

TeddyFluffkins

Thats wired the same as my own. However, its not working.
Sounds like a defective unit to me, tbh.
@dc42 @droftarts any ideas?

droftarts

@TeddyFluffkins You say the LED does not light when extruding. Does it flash at power up? See https://duet3d.dozuki.com/Wiki/Duet3dFilamentMonitor_RotatingMagnetVersion#Section_Status_indication_LEDs
Usually if it's not flashing, the magnet turning is not being sensed. Check that it has been put together correctly; I've seen other threads about getting low or no readings where the magnet is too far from the sensor.

Ian

TeddyFluffkins

@droftarts thanks for your reply!
I checked the assembly and could not find any fault. The bearings turn, the hobbed assembly turns, no blockage or anything.
Shall I attach some pictures of the sensor?
The LED is NOT flashing at all. Not at start-up. Not in red, nor green.
...looking at the picture from the docs again...is the magnet a separate part or is it included in the hobbed assembly part?
I'll edit the post within the next two hours and re-check the magnet - there was no extra part that registered as a magnet to me, so maybe its gone missing?

droftarts

@TeddyFluffkins if it’s not flashing at all, it’s not getting power. Check the continuity of the wires, and the connections.

Ian

TeddyFluffkins

@droftarts yea well, this is sooo embarassing...one crimp was bad, it got no contact on the pin. The front portion of it was flat instead of round ... idk how else to explain this.
Its on now, flashing different colors and reporting the angle correctly. Gonna try a print
Thanks for the help! Much appreciated.

Garfield

Make the limits (R70:130) pretty wide i.e. R40:160 until you get some sampling done and set the L value appropriately - especially if you're using a Raspberry Pi. My experience is that once it pauses on a filament event that you can't resume - of course I'd be really curious if your system can resume.