@ageis that blog entry hasn't been updated for many years. Documentation on connecting the IR probe (and other TYPES F z PROBE) is at https://docs.duet3d.com/en/User_manual/Connecting_hardware/Z_probe_connecting.

You don't need zprobe.mod for the IR sensor, it's only needed for the dumb modulated IR sensors supplied with later Ormerod and Huxley kits supplied by RepRapPro.

@greatlakes3dp you've made the mistake of treating the Z probe as an endstop. Remove the M574 Z line in your config.g file, then read https://docs.duet3d.com/en/User_manual/Machine_configuration/Configuration_cartesian#homing-z (in particular the bit about homing Z using a Z probe) to see if you need to change your homez.g and homeall.g files.

@ageis it has to be the underside because you want the top side to be PEI for your print to adhere to.

The reason for painting it is that PEI is transparent to IR so the sensor sees reflections from both the top and the bottom surfaces, which makes it less accurate. Painting the underside reduces the reflection from the bottom surface.

@ageis bear in mind that the IR LEDs that we use in the sensor are quite highly focussed, unlike the IR LEDs in remote controls. So you will to have your camera in line with the beam to see them.

@ageis can your camera see light from just one of the IR LEDs on the board, or from neither of them?

@droftarts I will add the G90 and change the pressure advance setting to the correct tool. The reason I am not using the 0 drive is that ithe driver was fried by my bad extruder motor. I had to switch drives once I got the motor replaced. Thanks for all the help

@ageis said in Ir probe all of a sudden triggering early:

Today when I homed the y axis it just trigged immediately.

Do you mean Z? That's what the probe is set up for. And it sounds like the probe is responding correctly. If it's Y that isn't homing, check the endstop isn't disconnected, then test the endstop is working correctly when you press it, by sending M119 before you press it, and again while you are pressing it.

Ian

@dc42 said in Idex second Z probe on the U axis:

@Proschi78 are the axes just shown incorrectly in the height map viewer, and the actual compensation applied is correct?
Please show the GCode commands that you are using to generate the height map.

I only use G29 K1

i have a Macro with the M557 U66:300 Y2:230
I start first, and then I give the G29 K1 command.
I haven't started printing yet to see if it's just rotated in the map.
I think it's better to have both on the same axis, unfortunately I don't have space on the x-axis for the additional BL touch.
Since I like to print on structured Pei, I need the Bl Touch.

@downshift64
Did you "manually" level your print bed before retrieving the mesh?

If I get this error message, the print bed has shifted, so I have to level it manually on the level wheels.

This can happen when the print surface has been reground or a different bed temperature has been set and the print bed has a different expansion.
Some cross holders (holder between the print bed and the printer frame) bend when a printing plate is cleaned with excessive pressure.

So take a piece of paper or a feeler gauge with 0.05mm or 0.1mm thickness and level the print bed with the bed level screws.
Paper or feeler gauge between nozzle and print bed.

Then you call up the mesh again with G29.

Google Translate
-- Original Text --

Hast Du Dein Druckbett "manuell" gelevelt bevor Du das Mesh abgerufen hast ?

Wenn ich diese Fehlermeldung bekomme, hat sich das Druckbett verstellt, so dass ich es manuell an den Levelrädern leveln muss.

Das kann passieren wenn die Druckoberfläche neu geschliffen wurde oder eine andere Betttemperatur eingestellt ist und das Druckbett eine andere Ausdehnung hat.
Manche Kreuzhalter (Halterung zwischen Druckbett und Druckerrahmen) verbiegen sich wenn eine Druckplatte mit zu hohem Druck gereinigt wird.

Nimm also ein Blatt Papier oder eine Fühllehre mit 0,05mm oder 0,1mm Stärke und level das Druckbett mit den Bettlevelschrauben.
Papier bzw Fühllehre zwischen Düse und Druckbett.

Danach rufst Du erneut das Mesh mit G29 ab.

@UserXY said in Bed scanning with BLTouch Z - probe:

M950 K1 P8 C"!124.io0.out"
M558 K1 P8 C"121.iO.in0" H5 F120 T600

Remove the K1 from those lines.

Thanks all for your help.

It was the connector ffs. Thanks again

@jay_s_uk That servo arm is as cute as a button, I like it.

@norder

Probe Offsets are correct Margin about 15mm, because the limitations added by the printhead dimensions

It was the M parameter or better the P parameter i lack off, so many thanks
i suggested the M one are beginning at zero.
at least i was excepting a gap at end like 270/10.

solved then

Photo of the print surface?

Can you try placing a plain piece of paper over the bed and see if that will trigger?

@andnosobabin
Manually level the print bed with the level wheels... and recalculate the Z offset

@phaedrux
For the most part, the code has remained as shown in the previous comment.
I made some small changes, but they are not decisive.
Fine tuning 😄

Here my complete config.g

; Configuration file for Duet WiFi (firmware version 3.3) ; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool v3.3.10 on Sun Mar 20 2022 22:36:03 GMT+0100 (Mitteleuropäische Normalzeit) ; General preferences G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"DDA5X" ; set printer name ; Network M552 S1 ; enable network M586 P0 S1 ; enable HTTP M586 P1 S0 ; disable FTP M586 P2 S0 ; disable Telnet ; Drives aus 2.05 M569 P0 S0 F1 ; physical drive 0 goes backwards - x-achse (TOFF F1) M569 P1 S0 F1 ; physical drive 1 goes backwards - y-achse (TOFF F1) M569 P2 S0 F7 ; physical drive 2 goes forwards - z-achse links (TOFF F7) M569 P3 S1 F7 ; physical drive 3 goes backwards - z-achse rechts (TOFF F7) M569 P4 S1 F1 ; physical drive 4 goes forwards - extruder (TOFF F1) ; Steps, Ströme und Geschwindigkeiten M584 X0 Y1 Z2:3 E4 ; dual z - kombiniert die beiden z achsen (P3) M350 X16 Y16 Z128 U128 E32 I1 ; microstepping und interpolation M92 X160.000 Y160.000 Z6400.000 U6400.000 E1348.351 ; set steps per mm M566 X300.00 Y300.00 Z420.00 U420.00 E420.00 ; set maximum instantaneous speed changes (mm/min) jerk M203 X18000.00 Y18000.00 Z1000.00 U1000.00 E1200.00 ; set maximum speeds (mm/min) M201 X300.00 Y300.00 Z100.00 U100.00 E250.00 ; set accelerations (mm/s^2) M906 X1400 Y1400 Z1400 U1400 E800 I30 ; set motor currents (mA) and motor idle factor in per cent M84 S10 ; Set idle timeout ; Axis Limits M208 X-16.5 Y-37.0 Z0 U0 S1 ; set axis minima M208 X330 Y330 Z360 U360 S0 ; set axis maxima ; Endstops M574 X1 P"!xstop" ; configure unsupported switch-type endstop for low end on X via pin xstop M574 Y1 S1 P"ystop" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ystop M574 Z1 P"!zstop+!e0stop" ; configure unsupported switch-type endstop for low end on Z via pin null ; Z-Probe (IR-Probe & BLTouch) ; IR-Probe M558 K0 C"zprobe.in" P5 H1.5 F100 T18000 B0 A4 S0.010 R0.4 ; disable Z probe but set dive height, probe speed and travel speed G31 K0 P500 X0 Y24 Z3.250 ; set Z probe trigger value, offset and trigger height ; BLTouch M950 K1 S0 C"exp.heater7" M558 K1 C"e1stop" P8 H3 F100 T18000 B1 A4 S0.010 R0.4 ; disable Z probe but set dive height, probe speed and travel speed G31 K1 P500 X-29.40 Y11.50 Z1.040 ; set Z probe trigger value, offset and trigger height ; Grid M557 X25:300 Y25:300 P7 ; Mesh-Grid ; Heaters M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp M950 H0 C"bedheat" T0 ; create nozzle heater output on bedheat and map it to sensor 0 M307 H0 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit M143 H0 S120 ; set temperature limit for heater 0 to 120C M308 S1 P"!spi.cs1" Y"rtd-max31865" ; create sensor number 1 as a PT100 sensor in the first position on the Duet 2 daughterboard connector M950 H1 C"e0heat" T1 ; create bed heater output on e0heat and map it to sensor 1 (e0heat) M307 H1 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit M143 H1 S500 ; set temperature limit for heater 1 to 500C M140 H0 ; map heated bed to heater 1 ; PID Tuning ; -- Düse -- ; M307 H1 R2.055 K0.283:0.000 D9.92 E1.35 S1.00 B0 V23.9 ; Werte für das HotEnd 25.März 2022 (Befehl für erneute Messung: M303 H1 S220) M307 H1 R2.095 K0.265:0.000 D9.20 E1.35 S1.00 B0 V23.9 ; Werte für das HotEnd 22.März 2022 (Befehl für erneute Messung: M303 H1 S255) ; -- Druckbett -- ; M307 H0 R0.207 K0.168:0.000 D3.22 E1.35 S1.00 B0 ; Werte für das Druckbett 25.März 2022 (Befehl für erneute Messung: M303 H0 S60) M307 H0 R0.207 K0.178:0.000 D3.11 E1.35 S1.00 B0 ; Werte für das Druckbett 22.März 2022 (Befehl für erneute Messung: M303 H0 S70) ; Fans M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency M106 P0 C"Bauteilelüfter" S0 H-1 T45 ; set fan 0 value. Thermostatic control is turned off M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency M106 P1 C"Hotend Lüfter" S0 H1 T45 ; set fan 1 value. Thermostatic control is turned on ; LED Beleuchtung M950 F2 C"fan2" Q500 ; create fan 2 on pin fan2 and set its frequency M106 P2 I0 B0.0 C"Beleuchtung" X51 ; LED-Strip (12V) auf Fan 2 / (51 von 255 Stufen = 20%) ; Tools M563 P0 S"Dyzend Pro" D0 H1 F0 ; definiere werkzeug 0 - (testweise luefter 1 entfernt (F0: 1)) G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C ; Miscellaneous M501 ; load saved parameters from non-volatile memory M106 P2 S1 ; led beleuchtung

The heightmaps of the two probes are interesting.
I adjusted them (over several hours) as precisely as possible.
I think the BLTouch has small problems with the magnetic pressure plate, it is magnetized in strips.
Here is a video to make it clear... (Click me)

The IR-Probe has rather small difficulties with the surface.
If I put a wafer-thin film of oil on the areas where I determine the offset, then the repeatability of the measurements becomes more accurate.
The GFK FR4 plate is finely sanded very evenly.

The ideal result would be the sum of both measurements... the middle field from the IR-Probe and the edge areas from the BLTouch. 😄
Here are two screenshots...

IR-Probe...
IR-Probe.JPG
BLTouch...
BLTouch.JPG

Unfortunately I don't have a straightedge, but I'll get one so the next time I sand the FR4 plate I know where to sand more and where less.

Finally, the contents of files deployprobe0.g, deployprobe1.g, retractprobe0.g, retractprobe1.g.
*****0.g = IR-Probe
*****1.g = BLTouch

; deployprobe0.g ; called to deploy a physical Z probe ; ; generated by RepRapFirmware Configuration Tool v3.3.10 on Sun Mar 20 2022 22:36:03 GMT+0100 (Mitteleuropäische Normalzeit) ; insert codes for deploying the Z probe here M106 P2 S0 ; led beleuchtung aus ; deployprobe1.g ; called to deploy a physical Z probe ; ; generated by RepRapFirmware Configuration Tool v3.3.10 on Sun Mar 20 2022 22:36:03 GMT+0100 (Mitteleuropäische Normalzeit) ; insert codes for deploying the Z probe here M280 P0 S10 M106 P2 S0 ; led beleuchtung aus

G4 P400 = Waiting time to be able to see the LED of the IR probe better.
To the right of the extruder (seen here in the Video) you can see a light guide made of clear filament, which transmits the light from the LED.

; retractprobe0.g ; called to retract a physical Z probe ; ; generated by RepRapFirmware Configuration Tool v3.3.10 on Sun Mar 20 2022 22:36:03 GMT+0100 (Mitteleuropäische Normalzeit) ; insert codes for retracting the Z probe here G4 P400 ; 40tel Sekunde warten M106 P2 S1 ; led beleuchtung an ; retractprobe1.g ; called to retract a physical Z probe ; ; generated by RepRapFirmware Configuration Tool v3.3.10 on Sun Mar 20 2022 22:36:03 GMT+0100 (Mitteleuropäische Normalzeit) ; insert codes for retracting the Z probe here M280 P0 S90 M106 P2 S1 ; led beleuchtung an

Greetings from the North Sea coast 🦀

Google Translate
----- Original Text -----

Zum größten Teil ist der Code so geblieben wie im vorherigen Kommentar gezeigt.
Einige kleine Änderungen habe noch gemacht, die aber nicht ausschlaggebend sind.
Feintuning 😄

Hier meine komplette config.g (Siehe oben)

Interessant sind die Heightmaps der beiden Probe's.
Ich habe sie (über mehrere Stunden) so genau eingestellt wie möglich.
Ich denke der BLTouch hat kleine Probleme mit der magnetischen Druckplatte, sie ist streifenförmig magnetisiert.
Hier ein Video um es deutlich zu machen. (Link siehe oben)

Der IR-Probe hat eher kleine Schwierigkeiten mit der Oberfläche.
Lege ich einen hauchdünnen Ölfilm auf die Stellen wo ich das Offset ermittle, dann wird die Wiederholgenauigkeit der Messungen genauer.
Die GFK FR4 Platte ist sehr gleichmäßig fein angeschliffen.

Das ideale Ergebnis wäre die Summe beider Messungen... das Mittelfeld vom IR-Probe und die Randbereiche vom BLTouch. 😄
Hier zwei Screenshot's... (Siehe oben)

Leider habe ich kein Haarlineal, aber ich werde mir eins besorgen, damit ich beim nächsten anschleifen der FR4 Platte weiß wo ich mehr und wo weniger schleifen sollte.

Zuletzt noch die Inhalte der Dateien deployprobe0.g, deployprobe1.g, retractprobe0.g, retractprobe1.g.
*****0.g = IR-Probe
*****1.g = BLTouch

Info zum Inhalt von retractprobe0.g:
G4 P400 = Wartezeit um die LED vom IR-Probe besser erkennen zu können.
Rechts neben dem Extruder ist ein Lichtleiter aus klaren Filament zu sehen (Video), der das Licht der LED weiter leitet.

Grüße von der Nordseeküste 🦀

@arnold_r_clark
https://forum-duet3d-com.translate.goog/topic/29207/macro-ir-probe-trigger-height-subtotal-autom-determine/2?_=1657755374456&_x_tr_sl=de&_x_tr_tl=en&_x_tr_hl=de&_x_tr_pto=wapp

droftarts,
Thanks so much for the help, the probe is now deploying and retracting on command.

@phaedrux Fair enough, and the point of my question really, although badly put.

It's primary purpose would be to measure the difference in tool length when a tool has been changed, but a mechanical switch is quite straightfoward.

@dc42 I will give it a try in the next couple of weeks and follow-up. Thank you!

@chrishamm
That does make sense. Thanks a lot, I'll try this tomorrow 🙂

I figured it out. I was poking around and saw that somebody else had an issue with the electrolytic capacitor and how it had lifted off the board. I re-soldered the capacitor down onto the board and thought I fixed it. It seemed to work, but once the board heated up from the residual heat I was still having issues.

I decided to look at the IR LED's through my phone camera, and only one was lighting up. As I pressed on the unlit LED, it lit up. I re-soldered the unlit LED, and now they both light up, and the LED doesn't lift off the broken solder joint as the board heats up.

If anybody else out there has issues with their boards and wants to check that the LED is working, look through your phone camera in the dark. It should show up as a pink/purple light on the screen.