@T3P3Tony
I was even able to push it a little further. The most pain four our customers is the non-linear-extrusion calibration.

And what should I say, it is even possible to do that with the MFM 🙂

non_linear_extrusion_calibration.gcode

if exists(global.nlecalibration) set global.nlecalibration = true else global nlecalibration = true G10 P0 S235 ; sets the temperature M140 P0 S90 ; set bed temp M107 ; fan off M144 P0 S1 ; activate bed 1 heater T0 ; select tool 0 M98 P"0:/sys/meltingplot/home_if_necessary" ; check homing G29 S1 ; load stored hight map M83 ; use relative distances for extrusion G90 ; use absolute coordinates G21 ; set units to millimeters M116 ; wait for all heaters G11 ; unretract G1 Z300 ; raise z=20mm G53 G1 X50 Y50 F14400 ; move printhead to center G92 E0 ; reset e-steps M572 D0 S0.0 ; disable pressure advance M592 D0 A0.0 B0.0 ; disable non-linear-extrusion M591 D0 P3 C"e1stop" S0 R98:102 E0.2 L25.3 ; enable MFM, but do not trigger event G4 S5 ; wait for restart of MFM G91 ; relative moves ; 15mm G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 ; the mfm should be calibrated now if sensors.filamentMonitors[0].calibrated == null echo "Cannot calibrate filament monitor within 15mm - error!" M99 G4 S1 ; wait for filament monitor send timeout var totalCommandedBase = move.extruders[0].rawPosition var totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F60 G1 X50 E50 F60 G4 S1 ; wait for filament monitor send timeout echo "F60 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F90 G1 X50 E50 F90 G4 S1 ; wait for filament monitor send timeout echo "F90 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F120 G1 X50 E50 F120 G4 S1 ; wait for filament monitor send timeout echo "F120 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F150 G1 X50 E50 F150 G4 S1 ; wait for filament monitor send timeout echo "F150 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X-50 E50 F180 G1 X-50 E50 F180 G4 S1 ; wait for filament monitor send timeout echo "F180 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X-50 E50 F210 G1 X-50 E50 F210 G4 S1 ; wait for filament monitor send timeout echo "F210 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X-50 E50 F240 G1 X-50 E50 F240 G4 S1 ; wait for filament monitor send timeout echo "F240 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X-50 E50 F270 G1 X-50 E50 F270 G4 S1 ; wait for filament monitor send timeout echo "F270 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F300 G1 X50 E50 F300 G4 S1 ; wait for filament monitor send timeout echo "F300 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F330 G1 X50 E50 F330 G4 S1 ; wait for filament monitor send timeout echo "F330 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F360 G1 X50 E50 F360 G4 S1 ; wait for filament monitor send timeout echo "F360 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G10 ; retract G10 P0 R0 S0 ; disable hotend M140 S0 R0 ; set bed heater to 0° M140 P0 S-273.1 ; disable bed heater T-1 ; unselect tool set global.nlecalibration = false

The variable nlecalibration is for further use.

non_linear_extrusion_check.gcode

if exists(global.nlecheck) set global.nlecheck= true else global nlecheck= true G10 P0 S235 ; sets the temperature M140 P0 S90 ; set bed temp M107 ; fan off M144 P0 S1 ; activate bed 1 heater T0 ; select tool 0 M98 P"0:/sys/meltingplot/home_if_necessary" ; check homing G29 S1 ; load stored hight map M83 ; use relative distances for extrusion G90 ; use absolute coordinates G21 ; set units to millimeters M116 ; wait for all heaters G11 ; unretract G1 Z300 ; raise z=20mm G53 G1 X50 Y50 F14400 ; move printhead to center G92 E0 ; reset e-steps M572 D0 S0.0 ; disable pressure advance M592 D0 A0.003 B0.011 L0.2 ; enable non-linear-extrusion M591 D0 P3 C"e1stop" S0 R98:102 E0.2 L25.3 ; enable MFM, but do not trigger event G4 S5 ; wait for restart of MFM G91 ; relative moves ; 15mm G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 G1 X1 E1 F30 ; the mfm should be calibrated now if sensors.filamentMonitors[0].calibrated == null echo "Cannot calibrate filament monitor within 15mm - error!" M99 G4 S1 ; wait for filament monitor send timeout var totalCommandedBase = move.extruders[0].rawPosition var totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F60 G1 X50 E50 F60 G4 S1 ; wait for filament monitor send timeout echo "F60 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F90 G1 X50 E50 F90 G4 S1 ; wait for filament monitor send timeout echo "F90 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F120 G1 X50 E50 F120 G4 S1 ; wait for filament monitor send timeout echo "F120 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F150 G1 X50 E50 F150 G4 S1 ; wait for filament monitor send timeout echo "F150 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X-50 E50 F180 G1 X-50 E50 F180 G4 S1 ; wait for filament monitor send timeout echo "F180 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X-50 E50 F210 G1 X-50 E50 F210 G4 S1 ; wait for filament monitor send timeout echo "F210 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X-50 E50 F240 G1 X-50 E50 F240 G4 S1 ; wait for filament monitor send timeout echo "F240 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X-50 E50 F270 G1 X-50 E50 F270 G4 S1 ; wait for filament monitor send timeout echo "F270 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F300 G1 X50 E50 F300 G4 S1 ; wait for filament monitor send timeout echo "F300 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F330 G1 X50 E50 F330 G4 S1 ; wait for filament monitor send timeout echo "F330 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G1 X50 E50 F360 G1 X50 E50 F360 G4 S1 ; wait for filament monitor send timeout echo "F360 " ^ {(1.0-((sensors.filamentMonitors[0].calibrated.totalDistance-var.totalDistanceBase)/(move.extruders[0].rawPosition-var.totalCommandedBase)))*100.0} ^ "% error." set var.totalCommandedBase = move.extruders[0].rawPosition set var.totalDistanceBase = sensors.filamentMonitors[0].calibrated.totalDistance G10 ; retract G10 P0 R0 S0 ; disable hotend M140 S0 R0 ; set bed heater to 0° M140 P0 S-273.1 ; disable bed heater T-1 ; unselect tool set global.nlecheck = false

We have a tool which takes the values from that script and will aproximate the A and B factors of the non-linear-extrusion - but it can be done with excel as well. It will safe you alot of measurements 🙂

@invertmast
ok, i understand. Do you also have an M122 output when the filament sensor is producting wrong values?

And have you been able to get some pictures of the connections? And you are routing the signals through an ethernet cable, so some sort of twisted pair cable, which signal is running in a pair? Is the Data-Line running next to the GND of the Filament Sensor in a twisted pair? If not, that can be the problem.

Tim

@Perspective type 1 or type 2 filament sensors can be attached to another board now in 3.5rc1

@dc42 Ok, please let me know if I can assist you in any way, I'd really like to see these monitors working completely for me for the first time 😀

@infiniteloop oh shit.....10x checked and overlooked^^

Many thanks for the help. Now it seems to be working.

@Phaedrux thank you,i just did the update, i will try to see if it help today on my next print

@Dakota Interested in this topic!

@T3P3Tony

Excelent hopefully when done I'll be happy and upload the step of the negative space needed

@o_lampe

AS5601
Ø3MM unknown length

@demonio669 said in Configuring Type 4 = sensor with microswitch:

think it would be nice if the next version came with a built-in filament run-out sensor

The filament monitor needs to be placed as close to the extruder drive as possible in order to measure extrusion accurately; whereas a filament-out sensor should be further away from the extruder drive so that it detects the filament out condition well before the end of the filament reaches the extruder drive.

@metabo7000 we switched from attiny45 to attiny44a during the prototyping phase. The firmware has changed a lot since then.

@dc42 Maybe I can bring this idea back up since you are currently working on the filament monitors anyway? 🙂

@dc42 my bowden tube is 5 feet long from the magnetic v1 sensor to the orbiter extruder. It's a delta printer so that's really as close as I can get it. I am just now testing my v1 after years of it collecting dust as we speak.

@dc42 Thank you. Previously with Duet 3 Mini 5, the Filament runout works flawlessly. Even at the start of the print, if the filament is not there, it wont start the print. (Without any special codes). It was with
firmware 3.4.0

I tried the following code in start.g (Got from a thread):

if sensors.filamentMonitors[0].status = "sensorError"
echo "SensorError-0 Continuing to Print"

if sensors.filamentMonitors[0].status != "sensorError"
M25
set global.beepbeep1 = 1
M591 D0
M118 P0 S"filament error" L2```

It worked. When there is no filament at the start, it paused the print.
But when i resumed it without loading the filament, it continues (it means it is not continuously checking).

I kept the same code in resume.g, but it didnt work.

@jay_s_uk 3.4.4

@OwenD I did exactly that yesterday late afternoon. It is working now.

; Custom buttons M950 J1 C"^io2.in" ; define logical input for E1 filamentsensor M581 P1 T2 S0 R2 ; define trigger for filament auto load (trigger2.g) M581 P1 T4 S1 R1 ; define trigger for filament runout (trigger4.g)

Thank you very much both!

I was able to solve the problem myself - so this is for anyone who might stumble upon the same problem in the future.

The problem was the inertia (momentum) of the filament spool. The filament spool is held by the famous "Universal filament spool holder" that uses two ball bearings at each end and is extremely easy to move. So when the extruder has faster moves - it pulls the spool and it's inertia pushes the filament a bit more through the sensor than it is actually going into the extruder since the filament can bend and straighten - hence it all makes sense - that sometimes there is more, sometimes less filament going through the sensor - but the average is always exactly the amount that went into the extruder.

The solution is to constrain the filament path before and after the sensor - either by a tighter PTFE tube on both sides or maybe by a sponge filament cleaner at the entrance of the sensor.

If you are using the "Universal filament spool holder" - you can also put two PTFE washers on the sides of the ball bearings and squeeze them a bit with a locking hex nut - that would prevent the spool from rolling more than requested, but would still roll nicely.

Now my readings are normal.

Hope it helps someone having the same problem with the laser filament sensor.

@selva_tvi said in Filament Monitor Disbaled for First layer only:

@OwenD said in Filament Monitor Disbaled for First layer only:

start.g will be run once before the print starts so it makes sense to disable your filament sensors there.

I disabled daemon.g and kept the below contents in start.g

if job.layer = 1 & state.status = "processing"
M591 D0 S0
M591 D1 S0
else
M591 D0 S1
M591 D1 S1

But it didnt work. Even at layer 1, it was enabled only.

Any change to be made?

start.g is run before printing starts, so the layer number will be zero
Therefore your code would enable the sensor as the layer does not equal one.
In start.g just disable the sensors without any if conditions.
If you use the slicer layer change code I gave then it puts the enabling commands in the print gcode.
Otherwise use daemon.g to do the enabling if you can't use the slicer layer change section

I don't know how to connect the second wire to the duet to take direction into account. A quick and dirty work-around might be to post-process your g-code so to deactivate filament tracking just before a retraction move and reactivate it immediately afterward.

@azs123 ah yes, that will be the reason, good spot.

When you print from DWC the print jobs are uploaded to the internal SD card. So you're fine. The only time prints occur without the SD card is when they are sent from a gcode streamer over USB, like Octoprint, or direct connection to a PC with Simplify3D, for example.