IR Height Sensor

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  Need Help dc42
  • Saltypetz

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  I have been trying all day I used the other Tevo Black Widow information and just edit so it works with firmware 1.21. ; Endstops M574 X1 Y1 S0 ; Set active low endstops M574 Z1 S2 ; Set endstops controlled by probe M557 X0:335 Y45:260 S20 ; Define mesh grid ; Custom settings are not configured M307 H3 A-1 C-1 D-1 ; M558 P9 X0 Y0 Z1 H5 F200 T6000 G31 X-48.8 Y-18.2 Z2.3 P25 × G28 Z Error: Bad command: Probe deployment routine for BLTouch Error: Bad command: Probe deployment routine for BLTouch Error: Z probe already triggered at start of probing move Error: G0/G1: insufficient axes homed I am trying but I don't understand this board 100%. I am a beginner with this and try my hardest. The pin doesn't come out but the red and blue LED's are on and center of hotbed.
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  I can't get the Bltouch working
  • Saltypetz

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  I posted a question a few posts back, getting the answer to that will help us help you.
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  IR Z Probe not very repeatable, nozzle crashed again
  • Jacotheron

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  @jacotheron said in IR Z Probe not very repeatable, nozzle crashed again: An unrelated thing that was bugging me (not very important) is due to my starting G-code, the first 10 layers are seen as the first layer in the interfaces (and then layers 2-10 is completed in 0 seconds). Any way to tell the firmware where the first layer is starting, so that it does not estimate so high Time Left? The part in my starting G-code that cause this is a line where I extrude a bunch of filament while moving slowly in the Y direction, and being 1.5mm above the bed. This is to prime my nozzle, and in stead of putting it all down at the origin (like some printers/slicers do with factory settings), this leaves a simple fat line, which also clears the outside of the nozzle. Since I use Simplify3D, the first layer is marked with "; layer 1, Z = 0.150" -> I think if it finds anything like this, it should be the a good hook to start layer counting? Please monitor this thread https://forum.duet3d.com/topic/5288/empty-layers-causing-incorrect-layer-count/8 as your issue sounds similar and that one is already flagged for investigation.
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  G30 command
  • dgdgdgdg

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  Please note, P9 in the M558 command is only supported in firmware 1.21 and later.
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  IR Z Probe DC42
  • Dennild

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  Yes the trigger height of the IR sensor can be affected by scratches on the surface of the PEI. The piezo should give more accurate results.
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  Using IR Probe on Glass Bed
  • jmshep

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  Interesting, I've not heard of that happening before. Perhaps the black paper wasn't black enough. The ideal would be to use black glass, but it seems to be difficult to obtain.
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  Acrylatic glass (PMMA) and IR sensor
  buildplate pmma acrylic glass ir sensor • • Captain_sq

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  When using a bed material that is transparent to IR, the aim is to have as little reflection from the rear side of the bed as possible, so that the reflection from the top surface dominates. That's why I advise using a black surface underneath. If the sheet is glued down to the heated plate, then you need to paint the underside black before applying the glue or adhesive sheet, otherwise the adhesive will reflect too much.
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  This topic is deleted!
  • n9uye

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  No one has replied

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  DC42 IR Probe - Only one time flashing and showing 1000
  • Sen

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  Check the ground connection between the IR sensor and the Duet. Also check visually that the ground (centre) pin of the IR sensor looks properly soldered to the PCB.
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  Black printbite and IR Sensor - very inconsistent heights?
  • RGN01

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  To get accurate homing, make sure that the XY position at which you home Z coincides with one of the points in the mesh. This isn't as easy as it sounds, because when you execute G30 to home Z, probing is done at the current location; whereas when you use G29 to generate a height map, the nozzle position is adjusted to allow for the offset of the probe. So in homez.g and homeall.g, choose the XY location that you send the nozzle to before you execute G30 so that it is at the location of a probe point close to the centre of the bed minus the Z probe XY offset that you specified in the G31 command.
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  Bltouch goes down fast
  • IvanG

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  @ivang, perhaps you are loading a mesh using G29 S1? If you clear bed compensation by sending G29 S2 then the Z axis should not move when you move X or Y.
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  Mini IR sensor board
  • KLM

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  Oh, thank you, that's what I will do
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  IR Sensor and hairspray, can broken?
  • FBG

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  I have been using my IR with hairspray on my glass bed for almost a year now without any issues.
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  Mix between IR sensor and Piezo probe
  • fma

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  I have a question: how does the output probe signal works, on Duet? It could be used to switch between sensors (using an analog switch, driven by the probe output signal)… And how the probe input works, in analog mode? What voltage does the Duet expect to trigger? I read that a simple FSR could be used that way; I have one in my stock...
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  How fast F in M558 for IR height sensor ?
  • robm

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  I think I was using either F300 or F600 in that video. The sample interval for analog Z probes is 1ms, so F600 (10mm/sec) would give a theoretical uncertainty of 0.01mm; except that probing speed is reduced by a factor of 3 when the sensor indicates that it is close, so the uncertainty would actually be 0.0033mm. You may wish to use a M558 S parameter somewhat lower than the default 0.03mm, depending on the Z resolution of your printer.
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  Expierence with the anycubic ultrabase
  • AlexLin

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  The mesh that Anycubic puts down causes different heights to be selected. I t gives a result that looks like the bed is uneven. I got rid of my ultrabase as it didnt work with the ir sensor.
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  X,y offset of ir probe
  • AlexLin

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  Cool thanks
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  IDEX dual IR42
  • Neoxio

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  It should be possible to use two IR sensors by using the G30 S-2 option to set the tool offset by probing. If you can guarantee that only one sensor will be triggered at a time, by parking the other head in a position at which its sensor will not be triggered, then you could connect both sensors in parallel to the Z probe connector and use a trigger threshold of 250 instead of 500. Bear in mind that if the nozzles are not at the same height, you can't do ditto printing or mirror printing.
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  Blinking but no detection
  • timmit99

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  This has been solved. The Right-most LED had broken its solder joint so i had to scrape off some of the solder mask to expose some copper to get better contact and after adding more solder to the pin it has resumed working. The solder joints on those LED's seem to have very little solder connecting them.
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  Problem with IR sensor
  • AlexLin

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  A indeed sorry… I'll check r5 too