IR Height Sensor

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  Guide for posting requests for help
  • T3P3Tony  

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  UNSOLVED Auto Bed Leveling went bad
  • BlueDust  

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  @dc42 I can adjust the screws by hand very easily. Also, the tilt is generally ~.5mm off from the two furthest measurements from each other. I just setup 4 point instead of 3, in the corners and now playing around with it. I will have to get back to you on any improvement. Thanks!
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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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  Aluminum anodizing for IR probe
  • JRDM  

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  If you will be using a glass bed or PEI sheet on top of the aluminium, you should anodize it matt black. If you will be printing directly on the aluminium, the colour shouldn't matter provided it isn't too shiny.
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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.
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  Z-IR height is too high off the bed when printing
  • shaunppl  

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  @eran898 For you to admit the problem was down to human error and not the hardware, only confirms what I was saying. glad you worked it out. There are instructions on how to install/configure the IR sensor on non duet electronics on David's Website.
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  SOLVED IR probe and Duet Maestro
  maestro irprobe • • Maut  

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  @simplesimson said in IR probe and Duet Maestro: Hey, i´m still having the same problem. Do I need to use M558 P2 for the "digital probe"? if I do so, the Probe Z status in DWC shows 0 (5) when not triggered and 0(1000) when triggered. By Triggerd i mean a red LED. Sorry for the late response. M558 P1 is correct for the IR sensor that we sell. P2 is only for the sensor that RepRapPro included in the Ormerod 2 printer and I think also the Huxley Duo and one of their Mendel printers.
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  IR probe on roughed up mirror?
  • Eumldeuml  

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  Thanks for your replies! I will test that as soon as I get my printer up and running again!
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  IR probe playing up
  • Corexy  

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  Thanks very much for taking the time to type all that. I did pull it down, and there was a sign of impact on the probe. As it goes, the spare I had on hand was the new type. I bolted it up, set the nozzle height (which was exactly the same as the old one), and it's away and printing. I'm very much out of my depth with the programming on this thing, but my wiring and build has been solid, as this thing's been an absolute workhorse for almost 3 years. I actually bought 2 sets of gear (I have 3 more dead Zortrax's sitting there), and have never bothered fitting up the second. I'm going to have to bite the bullet and try and update the firmware though I guess...take a deep breath David! We know how that's gone every time, lol.
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  IR Probe readings
  • droftarts  

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  @droftarts Yes i think having multiple values for the reading with an analog z probe like the IR sensor is expected behaviour. ideally that would be a linear ramp from where it can "just see" the bed to 1000 when its saturated. The trigger amount should be picked to give consistent results with your bed surface. You can jog the axis down in small increments to see the profile of the readings at different heights and then use that to select the trigger height, I would normally have it trigger some amount above the Z0 position and then adjust the z probe offset .
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  Using IR Height Sensor with Duet 2 at 5V?
  • martink  

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  Yes it will affect the output levels. The IR sensor output is referenced to 5V but the ADC on the Duet is referenced to 3.3V. the 1.04 Duet is OK with up to 5V going into the Zprobe input, but you will have to see what the actual Z probew readings are. Instead if being about 465 and 535 (allowing you to use 500 as the threshold), they will be about 51.5% higher. You will need to adjust the threshold accordingly. Alternatively, use a 3.3v regulator on the print carriage, for example one of these if you want something easy to solder https://www.mouser.co.uk/Semiconductors/Power-Management-ICs/_/N-wnwh?P=1z0wa2eZ1z0z60lZ1z0y3js.