IR Height Sensor

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  Guide for posting requests for help
  • T3P3Tony

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  No one has replied

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  Suggestion for a new hardware revision
  • gtj0

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  The present design was made so that it can be fitted below the heatsink of a standard E3D V6 or compatible hot end, thereby allowing it to be placed closer to the nozzle.
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  Sensor component fell off
  • Nuffe

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  The phototransistor is SFH3015FA, the IR emitter is SFH4045N. They are available from the usual component distributors e.g. Digikey, Mouser and RS, but not from Farnell/element14.
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  Sensor suddenly changed trigger height
  • Mugga

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  @mugga, I'm glad you solved it!
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  Fiber Optic Extension?
  • gtj0

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  The sensor looks for the point where equal amounts of light are reflected into the phototransistor from each IR emitter.
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  Houston.... We have a problem... Think a big problem...
  • peirof

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  Yes I could look at what components are likely to have failed. However, if the green 3.3V LED is not lighting up and/or multiple ICs are getting hot, this typically means that multiple Ics have failed and the board is uneconomic to repair.
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  Testin Mini Height Sensor
  • peirof

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  Hi, YES... This was
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  Mesh Bed Probing issues
  • bbriggstkd

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  I have the mini differential IR Height sensor. I'll try removing those files and see what happens. I checked and they are there.
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  Homing with z probe on z axis
  • Puppet172

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  See https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#main for advice on connecting various types of Z probe. If the V_FAN jumper is set to the VIN position then the easiest place to get VIN is from one of the always-on fan connectors.
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  Need Help dc42
  • Saltypetz

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  For some reason I have to use heater pin 7 not heater pin 3.
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  homing z failed with bltouch
  • jroh

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  The bed.g file is needed only to do G32 bed probing, not for homing Z. Have you tested the Z probe and it configuration as described at https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe ?
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  Homing failed error even though it succeeded
  • ryall

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  G30 S-1 just stops the probing move when the prove is triggered and reports the height, but it doesn't set the Z position. Use plain G30, without the S-1.
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  Auto mesh/bed leveling not working
  • ryall

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  Thanks, that seems to have fixed it (mostly).
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  IR probe not triggering at 500
  • benwilde

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  The values should be close to 465 and 535. If you are getting 408 and 439 then I suspect that you have a poor connection between the +3.3V pin of the Z probe connector and the Vcc pin of the sensor.
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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.