Posts made by Frankzz

@phaedrux
I am in Sweden.
But no worries. I bought 2 new sensors and Hobbystore have made contact(on Friday) and will send new sensor.

@phaedrux Like I described in previous post the package with the bad sensor came back.

Doubled checked address and it is correct.

Maybe Hobbystore did not recive it. I dont know.
Desperate to get printer working.

Tired of Hobbystore.
Can you tell me where to buy the sensor? I have a hard time finding it.

Frank

@phaedrux said in Magnetic filament sensor issues:

Had you heard back a reply from hobbystore?
no

@phaedrux No, but I think I know why now.
I just got package with my old sensor back.
Writing is in polish so I am not sure but it seems address was wrong.

This is very strange. I printed the address from their website, it also included phone number and E-mail.

I doublechecked now and it is the only address on their site.
Package has not been opened.

I need to buy more stuff for the printer anyway. Will try to find a place that has your sensors and other stuff I need.
I think Hobbystore had their chance......................

@phaedrux WAC-EFUQIRO

@phaedrux
Thanks. I disabled the sensor last night. Set the parameter so it just monitors. Have a saved log file on this.
But even then it stopped the print "sensor not working".
Used some tricks I have learned during this ordeal and got the print running.
Right now print is running with sensor enabled and stops intermittent.

Being without sensor is not an option at the moment. Need to print. Rather have it stop intermittent than without monitoring.
So can you contact Hobby Store about the warranty sensor? Both are bought there.
Once I got that one I can send the one that is in the printer now.

The shipping on warranty is 20% of what a new sensor cost. I might just buy 3 new sensors and hope that one works.

:@phaedrux
UPDATE
I started a new print, forgot to sand sensor at first.
It kind of worked after the usual issues.
I stopped it and sanded the sensor.
Restarted ( 18:19:55 in attached log console (6).txt ) and now it does not work.
It lays down filament fine but says "too little movement" and " sensor not working" and pauses.

I loosen the screws a little and checked that the axle spins.

I will try in an hour or two since it worked yesterday.

I really liked to get the replacement sensor ASAP. I got no response from Hobby store so can you please help me with this?

About sending the current sensor on warranty, I bought it over a year ago and already got a new under warranty so I guess that ship sailed.

Are there such issues with these sensors? Am I doing something wrong?
Some prints I run is 100 hours +. So some kind of sensor is needed.

Before these sensors, if there was a feed stop I had to go and find the Z height with a feeler gage and use Notepad ++ to make a program that started at the right height.
It took a lot of time and sometimes I got one layer too low or too high and the print was f**ked anyway.

The documentation on the laser sensor says it is not a good choice for PETG and 99% of what I print is PETG.

@phaedrux
Ok, I bought one over a year ago. It worked for a while. Sent that back on warranty, got a new one.
I also bought a new one as a spare/ for second extruder.
This is like 6 months ago.

One of these started to have issues and LED stopped working. This one I sent back on warranty too. December last year.

I been running the "spare" since October or something. LED stopped working on that one too but sensor kind of worked.
I only have one sensor right now. Waiting for the replacement sensor I sent in December.

The sensor I have now has kind of worked, description in thread.

In the top of first message in the thread there is a link to previous post about all the issues.
https://forum.duet3d.com/topic/23258/magnet-filament-sensor-stopped-working

The propose of this thread was to ask T3P3Tony for advise what to do and also kind of prove there is nothing wrong with the wiring, it is the sensor. He is the one who answered questions in previous thread.

I suggest that once I get replacement sensor first thing to do is to check if LED is working.
If not there is something else wrong and that might be the reason behind all the problems.

@phaedrux
Hi, just to be clear. I had 2 sensors. One I sent back on warranty to Hobby store (Poland) 5 weeks ago and have not received a replacement yet.
Is it this one I should E-mail about?

Or is it the one I described in the thread? It is the third sensor that have problems. I been chasing issues with these sensors for a long time. Really thought I solved it.

Re: Magnet filament sensor stopped working

@T3P3Tony
I think I started a new thread referencing an old one where we have discussed problems with my filament sensor.
I did write a answer a month ago saying that I thought the reason for issues was heat.
It was not, 30 minutes after I posted that thread the issues started again.

From your earlier answers I guessed you think that the sensitivity variation over a print is the issue.
So I tried to tweek settings to make this better and made mechanical changes. It got better but still false movement stops and the "sensor not working" happened intermittent.

Then I found the A parameter, that specifies what movement should sensor care about.
I set this to (1) and then things has been going much better.
Since then the variation in sensitivity has been in 0,1 instead of 1 range.
It can be between 24,7 to 25,8 when starting but variation is not much.
Still get false messages but one or two in a day instead of every hour.

That is until today. See attached file.
First part is a 17 hour print I left in as reference.

I think I had one false stop and I change filament roll once during the weekend.
This morning I got "too little movement message" Restarted, got same message. Retracted filament but there was no issue. Restarted and it laid down filament but same message several times.
Sent "M591 D0 " command several times and got sensitivity values off the chart.
This was around 10:00. I did not have time to fix this so I left it.
Around 16:00 I figured I had to do something to save the print. I tried restarting one or two times and then it worked.
This tells me there is something going on with the sensor. Why it started working again is a mystery.

I will sand it to make AGC value better before next print but AGC value is fine when sensitivity is not so it should not be connected.

I had this happen a couple times, "too little movement" 2-3 times within 30 sec after each other but still printing fine. Normally it start working after a few restarts but this time it did not until waiting 5-6 hours.
Have not looked at/checked sensitivity previous when this particular problem occurred. Most likely it was not a problem, I should have noticed it.

When I mounted the very first sensor and it still worked the sensitivity was within 3 mm and I had no problems.
I have not made any updates or anything that should make this more sensitive.

I have still not received a warranty replacement sensor from Hobby store.

I like to know if there is something I can do to fix this

console.csv console (5).txt

@t3p3tony Hi
I think I figured out what triggers the "not working"

Printer has 2 printing heads. I mostly only use one but can see temperature on the one not used.

If it is above 57° the filament sensor has issues. Below that it works most of the time. Printed for about 120 hours without "not working" Really thought the problem just went away but got "not working" 2 times within 30 min. Saw the the temp was a few degrees higher. Lower table temp with 5 ° and open lid for a few minutes. Got temp down to 53°. Temp has not been over 57° since and no more "not working"

I know that this temp needs to be under 60° otherwise filament gets soft and stops extruding. So I have been monitoring it for a long time. At least since beginning of summer when I found this issue. When it was 30 ° plus in the workshop the filament roll was warmer than usual and that is when I had a lot of extruder stop with same parameters I had when it was colder. After a lot of trial and error I figured out the temp issue.

It was -15° outside and 12° in the shop 2 weeks ago so I printed with a "curtain" I have in front of the printer to keep the the heat in. I also raised the table temp a few degrees since some prints warped when printed close to the edge of table.
This raised the temp and filament sensor started to have gremlings.

Anyway, I finally got the email from Hobby store and sent the other faulty sensor on warranty to them.
When you get that sensor it very well might work when cold. That one had issues during summer if I remember correctly. So it might be a temperature issue.
Also thinking back I pretty sure the issues gets less frequent the further down the tables moves in Z during a print. Temperature gets a few degrees colder round the extruder the further down in Z it is. Had a print that was 550mm high and it worked without stopping the last 150mm.
Since I figured this out I moved the sensor up about 80 mm from extruder. Before it was 10 mm to minimize stretch/compression in the filament.
Now it works better.

Once I get a new sensor on warranty and plug it in we will see if LED works. If you look at our conversations about the sensors the LED stopped working on one and when I changed to my spare the LED did not work on that one either.
Sensor still worked so we did not worry about it. I guess the faulty sensor (LED not working) I sent on warranty will find its way to you sometime. It would be good if you check if LED is working.
If it is something is wrong on the motherboard.

Frank

@t3p3tony said in Magnet filament sensor stopped working:

kes me wonder if there is something happening with the wiring occasionally.

I don´t see much difference. What is it you see?
I have changed checked length on this print compared to earlier. Before 8 mm, now 12 mm.
This have made a difference. It has only stopped 3-4 times with the "not working" message during 25 hour print.
The same program got to 30 hours with 8 mm and had over 50 "not working" messages during the same time.
The wiring have no joints so in that case it is the connector.
Remember that this was the same problem I had with old sensor which went away with changing sensor.
It has worked without "not working" message for hundreds of hours of printing.
Sure I can measure wiring but I am 99% sure when I get a new sensor on warranty the problem is gone.
So we can wait for this.

My confidence in these sensors is not high. The manufacturer of the printer has just come out with their own sensor and I have ordered these. But until I got these I need the to be resolved

@t3p3tony
Of coarse it took hours before it stopped, This is the longest time it has worked.

20:06:06: M24: Printing resumed
20:05:37: M591 D0: Duet3D magnetic filament monitor with switch on input 3, enabled, sensitivity 25.25mm/rev, allow 5% to 300%, check every 12.0mm, version 3, mag 131 agc 108, measured sensitivity 25.59mm/rev, min 33% max 105% over 148837.4mm
20:05:30: : Printing paused at X280.6 Y108.9 Z26.1
20:05:25: : Resume state saved

Here is one an hour earlier. NOTE this was NOT because it stopped, I just sent command to check status
19:19:34: M591 D0: Duet3D magnetic filament monitor with switch on input 3, enabled, sensitivity 25.25mm/rev, allow 5% to 300%, check every 12.0mm, version 3, mag 129 agc 105, measured sensitivity 25.58mm/rev, min 33% max 105% over 128101.2mm
19:19:32: M591 D0

@t3p3tony Sure. Got the error 3 hours ago. Will do it when I get it again.
Not sure what you mean with DWC console.
I type M591 D0 in G code console. But I get nothing different compare when it is working.

@t3p3tony Duet3D magnetic filament monitor with switch on input 3, enabled, sensitivity 25.02mm/rev, allow 10% to 200%, check every 8.0mm, version 3, mag 130 agc 106, measured sensitivity 25.46mm/rev, min 99% max 101% over 582.6mm

I know the AGC is on the limit but the other sensor that have same issue had AGC 87 something so it is not likely it is the problem.

@t3p3tony
Hi
I have not got around to send faulty sensor yet.
The new one has been working good for 2 months and hundreds of hours of printing.
Two day ago it started with the same problem as the old one.
It says "sensor not working"
Since it has been working for quite sometime I can exclude that it is a wiring problem.
¨
I still like to know what condition is fulfilled to set that message. This so I can figure out what the hell is the problem.
Printer stops between 15 min to 5 hours. It is annoying with a single print of 150 hours taking twice or more as long.
I will send the old faulty sensor ASAP. I need a new one.

@t3p3tony Yes, no flashing of the LED what so ever

17:57:09M591 D0
Duet3D magnetic filament monitor with switch on input 3, enabled, sensitivity 25.02mm/rev, allow 10% to 200%, check every 8.0mm, version 3, mag 130 agc 106, measured sensitivity 25.46mm/rev, min 99% max 101% over 582.6mm

EDIT
The housing on the new sensor is much nicer then the earlier ones I have got. It was flat and nice. Sanded it to AGC 104 now. Vibration is gone.
LED still not working.
Starting a long print to test it.

@t3p3tony For the "old" sensor it was "Extruder D0 reports sensor not working"
May be not exact but to get what it says exactly I need to but the old sensor back.

For the new one, it seems to work but the LED is not working at all on this one either.

From memory I thougt AGC 109 was good. Logged on to forum to double check.
Old one had 97 after sanding it.

@t3p3tony I writning in this topic since it is a continuation of earlier post.

The sensor with the LED not flashing has worked since I wrote last post (17 of May it seems)

I have not been printing much since June but sensor was working.

Started a 13 hour print some days ago and got "extruder reports filament sensor not working" about 40 times.
I just resumed print everytime and it keept printing. So the 13 hours turned out being 3 times more.

So now I changed the sensor to a brand new one I bought as a spare.
Just tested it and it works but the LED is not working on this brand new one either.
It does have agc 109 out of the box which is really good. But it has a vibrating sound and if I hold it I can fell it vibrating alot.

Only tested it for 20 minutes, will start a 54 hour print this afternoon.

So I am asking if the offer to replace the old sensor under warranty still stands.
Also I lke to know if anyone else had this problem.

The LED did flash from the beginng so I am pretty sure it is connected correct

Frank