IR Height Sensor

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  Guide for posting requests for help
  • T3P3Tony  

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  Bed Mesh Compensation off on reboot
  • spnkzss  

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  The G29 S1 in the config.g did not work. I believe it's because you can't home everything until after the system has booted up anyways. However, @tobias_munich is on the right path as @Veti said. I reset the glass back up, set my Z offset, rebooted, compensated, rebooted again, ran G1 Z0, too tight. Pulled it away from the bed, ran G29 S1 manually, ran G1 Z0 again and this was just right. I added G29 S1 after the G28 command in my starting g-Code of the file and am currently printing on glass correctly for the first time. Thank you all for your help!! However, this feels like a band aid. I get what we have accomplished and it makes sense, but I still wonder what the root cause of the problem is. It's almost like the firmware wasn't taking my trigger height by some percentage. I'm going to try printing for awhile as it sits right now just to get some hours out of the machine and make sure I can get consistent prints. Thanks again and let me know if anyone else has any ideas for the root cause. Rob
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  Nozzle to high after switching to IR mini
  • eiten  

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  Ok, an update. After Homing, the ofset is also there. Seems to be exactly 1mm...
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  bad head crash
  • BlueDust  

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  Ouch! It looks like the IR receiver has come adrift at one end, at 'Q1'. Though there are solder pads for a capacitor at C1, mine doesn't have one there, so I think it's not needed. If the only other option is to replace it, I'd have a go at soldering it back on. How can you make it worse?! Ian
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  UNSOLVED IR Probe faulty?
  • stewwy  

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  @droftarts No there is no trigger light, and I've checked for continuity, that was the first thing I thought of.
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  Help with IR Probe on LPC Port please
  • sinned6915  

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  If lacking a programmer but having an Arduino or ESP8266 on hand then this will sort you out: https://github.com/esp8266/Arduino/tree/master/libraries/ESP8266AVRISP https://github.com/arduino/Arduino/blob/master/build/shared/examples/11.ArduinoISP/ArduinoISP/
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  Aluminum anodizing for IR probe
  • JRDM  

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  @Phaedrux It looked like lemon candy melted in a cast iron pan. Its hard to describe really. I got a 0.030 piece of PEI from CS Hyde and laid up the anodized sheet under it. The top surface was all slick and glossy, like glass. It was really quite pretty actually. Polished gloss actually. It reflected light too well so I wet sanded it with 400 grit and then ran a maroon then white scotchbrite pad over it to break the surface.
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  E3D hemera mount
  mount hemera • • oliof  

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  I'm still waiting for my Hermera to arrive. So I'm just in the design fase right now. Was thinking of moving it a little to the right with respect of the center of the guide blocks so to have a little more printing space.
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  UNSOLVED Auto Bed Leveling went bad
  • BlueDust  

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  Homing Z to bed center, or ideally a point close to center that is also a point probed during G29.
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  [Newbie] IR Mini Z Probe Install and Calibration Issues
  • Sqwuid  

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  I was using that and DC42's instructions for the IR Mini, my original post was about an error I was receiving about the IR Probe stopping. "Z probe was not triggered during probing move Stopped at height -0.000 mm" Except that the reading from the head I am getting is -3.50...
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  Remapping Input for IR sensor on duet wifi
  • FailsafeJim  

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  Please use this thread instead: https://forum.duet3d.com/topic/13052/ir-z-probe-issues/8.
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  Mesh bed compensation not correct
  • CR3D  

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  Hi, dc42 has reported a problem with mesh compensation and is working on it. Frederick
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  UNSOLVED dc 42 ir sensor problem?
  • Lc1975  

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  Sorry, I didn't read every comment so excuse me if this was mentioned, but I have the IR Sensor and using painters tape on the bed works pretty well.... I use the painters tape for some prints, and found the IR sensor works well when the tape is left on when running the bed leveling routine. Might just leave the tape on the 3 spots near the Z screws for Auto Bed leveling when I don't need it... A while back, the nozzle hit the bed pretty hard and since then my IR Probe can get funky at times. When it does, I just unplug it, wait a few seconds and plug it back in. Also, I was having trouble getting it to work on glass (white surface under glass, and light right above printer). I have a BLTouch on the printer to help out when needed, but since I found it works well with tape, I am considering removing the BLTouch altogether.
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  Adjusting IR leds and receiver
  • Bravewildheart  

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  This topic is deleted!
  • Stevo  

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  true bed leveling dual independent lead issue
  • gueee78  

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  https://duet3d.dozuki.com/Wiki/Gcode#Section_M669_Set_kinematics_type_and_kinematics_parameters What fudge factor? M669 sets the Printer Type please run this macro https://forum.duet3d.com/topic/6962/m48-measure-z-probe-repeatability-and-print-to-serial-output
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  SOLVED IR probe and magnets
  • OBELIKS  

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  Perfect , thank you.
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  New IR-Probes -> false Triggerheight
  • CR3D  

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  I made a change to the firmware on the IR sensors a few months ago. This was to resolve a problem whereby when using a highly reflective bed surface (e.g. white or shiny aluminium), some probes gave a false trigger at a great height (usually several cm) as well triggering at the correct height. So the newer sensors don't trigger unless the total received IR is above a certain threshold. I verified that they still work with dark surfaces, including black/grey BuildTak and with glass backed by black paper. You can tell if your sensors have the new firmware, because at startup it gives one short flash, then a pause of about 4 seconds, then the usual 2 or 4 flashes depending on what mode it is in. The older firmware doesn't give the short flash at the start.
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  Build surface options
  • SupraGuy  

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  Printbite and dc42 IR Sensor (2019)
  • Baal  

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  I have the older "beige" color and it didn't work well with the IR sensor. I'm sure @dc42 will weigh in when he has a chance but I'd think the black matte surface would give the best/most consistent results. I would think that a clear material would create too much opportunity for reflections from the top surface as well as the bed especially if the adhesive isn't perfectly bonded to the bed in placed. On the other hand, it worked for you previously.