IR Height Sensor

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  Guide for posting requests for help
  • T3P3Tony

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  Mesh Bed Compensation woes...
  • Credo

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  Is there any graphics on the bed itself that lines up with those spikes? Can you try running the G29 with a piece of plain paper covering the bed?
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  Printing on surfaces or objects.
  • cookie

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  Define probe offset from extruder.
  • MKR2

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  @devleon Thank You !
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  IR sensor configuration
  • mrcrow

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  @mrcrow I am using an ir sensor with glass I tried black paper and it didn't work that well, I switched it out for cheap matt vinyl vehicle wrap stuck to the bed then covered with the sheet of glass, that is working a treat.
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  IR Trigger height suddenly changed a lot
  • JKaechler

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  Is your IR sensor the older sort with through-hole phototransistor and IR diodes, or the new sort with surface mount ones? If it's the older sort, then you have probably had a collision and one of those components has been bent into a different position. If it's the newer sort, then perhaps it has developed a fault.
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  z-homing failed with mini IR
  • gueee78

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  @gueee78 said in z-homing failed with mini IR: Error: Probe points P0 to P1 must be in clockwise order starting near minimum X and Y That message means that the firmware thinks you want to do old-style bed compensation. It should only do that if the number of leadscrew coordinates you defined in M671 doesn't match the number of Z motors defined in M584. So try running M584 without parameters, and M671 without parameters, and report the results.
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  Mini IR height sensor Setup: Z-probe value at a "long" distance
  • FelixH

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  @dc42 said in Mini IR height sensor Setup: Z-probe value at a "long" distance: What firmware version are you using? The M558 X Y and Z parameters have been ignored since many versions.
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  IR probe values wrong (SOLVED)
  • planeguy

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  @planeguy, I'm glad you solved it.
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  running a duet wifi with a dc42 ir
  • LARRY

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  Check your M558 if it is correct in your config.g -> H0 ??? I can only tell you how it works for me and it does it without any problems: First I have homed my printer in all axes, where I have the endstops X min, Y min and Z max -> so my config.g = "M574 X1 Y1 Z2 U2 S1" (is built differently for you, so configured differently ). also i do NOT use my mini-ir as z endstop Then I determined the distance with the procedure drive the bed to center and Z about 10mm -> check indicator "probe" in the DWC (must be 0!) manually move carefully in the direction of Z0 -> display "probe" in the dwc must indicate a value of about 465 when the nozzle come closer to the bed drive further in the direction of Z0, the "probe" value must indicate about or over 535 (now your nozzle has only a little distance to the bed) drive the bed back to approx. Z10 Send M558 P1 send G31 P500 Z1.0 manually push the printhead into the middle of the bed manually approach Z0 with paper set Z0 with G92 Z0 drive to bed position with G91 Z5 take the measurement with G30 S-1 (note: this value should be between 0.5 and 2.5!) now send G31 P500 Zxxx (xxx= the value which is shown at the G30 S-1 command and write it in your config.g too!) write the corect M558 in your config.g
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  IR Sensor loosing precision over time?
  • PDBeal

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  @dc42 I recently discovered that my IR probe starts behaving as if it's in digital mode after a while if i'm printing in an enclosure and/or the hotend is hot for enough time for the probe to warm up. And that's even though it boots as analog. The z probe is approx. 20mm away from the nozzle (probably 10-15mm away from heatblock with a silicone sock)..and I don't think the enclosure gets warmer than 40-45 deg.
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  Cover for IR Height Sensor. Where don't work the Sensor?
  • FBG

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  I'm not sure that any transparent material at all will work, because you will get reflections from both surfaces. If you want to try it, I suggest you try a piece of thin acetate sheet (like the stuff that used to be used with overhead projectors) placed right against the IR diodes and phototransistor.
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  DC42ir Sensor not flashing annymore ?
  • Ray

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  Thanks for your help David, The probe is working again, must have been a bad connection afterall. Problem solved
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  Hotend crashing into bed again
  • TwoTone

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  I'm not a delta user but maybe this could help guide you. https://duet3d.dozuki.com/Wiki/Calibrating_a_delta_printer
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  Print sometimes not using mesh bed leveling - startup gcode
  gcode leveling mesh compensation • • ComedianTF2

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  https://www.dropbox.com/s/xlzhcwm6c8qfyar/benchy_not working.gcode?dl=0 https://www.dropbox.com/s/2kg1cpzdxq78m8h/benchy_working.gcode?dl=0
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  Experiences with the Mini IR and PEI
  • Rivam

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  Ive got a Tronxy X5S upgraded with my own mods. I have this glass bed https://www.amazon.co.uk/gp/product/B07FLBLTXF/ref=ppx_yo_dt_b_asin_title_o06__o00_s00?ie=UTF8&psc=1 and DC's IR bed sensor. I purchased a matt black peice of card from WH Smith, cut it to size and placed it between the bed and glass. Everything works a treat and my heightmap could not be better. My prints are top notch too.
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  Can I use an IR sensor as the X and Y endstop?
  • fho

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  The Ormerod printer uses the IR sensor not only as the Z probe but also as the X endstop. There is a tab mounted at the end of the X axis, which the sensor sees. The sensor must not be too close to the bed during homing, so that it doesn't respond to the bed, only to the tab. I hadn't considered the possibility of sensing the edges of the bed instead. The problem would be working out a sequence of moves that will succeed in homing regardless of the initial position. One possibility might be: With reduced motor current, move both X and Y a small amount in the negative direction, to ensure that the probe is over the bed. If X or Y is already at or close to the minimum stop, the reduced motor current will avoid damage. Home Z using the sensor. Drop the head a little, invert the trigger polarity in M558, then home X using the sensor to find the +X edge of the bed. Move back a little in X to place the sensor over the bed again, then home Y using the sensor. Move to bed centre, restore the original trigger polarity, and re-home Z.
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  SOLVED IR Probe and the Fan !?!
  • Michael Suberg

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  @dc42 said in IR Probe and the Fan !?!: May I mark this as solved then? Yes gladly
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  Struggling with IR sensor Z offset
  • octatesta

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  I'm going to have to open one of these threads too, I'm having similar issues and the recommended fixes haven't helped.
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  Hotend crashes after print was stopped and started again.
  • Sushiator

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  I already have that T0 Command in my Config, so i could have both print cooling fans as "Tool Fans" right after Startup. Gonna check that M558 the next time i screw smth up. Oh, and keep up the good Work, great piece of Hardware you made there!