IR Height Sensor

br7408

I finally got around to building my third printer. All 3 are exactly identical printers. I am noticing a weird issue with the 3rd IR height sensor. It boots into digital mode just fine, but it seems to trigger at 2 different heights. The first height is well off the bed, second height is about normal. Never seen this before. Is this unit defective?

oliof

@br7408 ISTR that there is a chance for false triggers at high distances due to stray reflections. I dont remember what the workaround/mitigation was.

br7408

@oliof It has this issue with any surface.

oliof

@br7408 it may be a faulty probe, a similar case of this was handled under warranty (ref https://forum.duet3d.com/topic/30051/ir-probe-faulty-triggers-well-before-the-actual-trigger-point/22). One for @Phaedrux I guess.

br7408

HMMM. Strangely it seemed to fix itself somehow. I wonder if the EBB 42 woke up stupid or something.

oliof

@br7408 it didnt endeavor the threat of replacemebt I guess.

br7408

I take that back.

I went to calibrate the probe and I am getting errors, because it is not triggering properly. How do I initiate obtaining a replacement?

Here you can see it is initially triggering way low, and then nothing, and then triggering again high. Getting 2 red blinks on startup, as it should.

Specifically: "No trigger on probe after full movement" error in Klipper. Both other IR sensors in the other two identical machines work just fine.

20250128_202731.mp4

droftarts

@br7408 said in IR Height Sensor:

It certainly looks to be a bit flaky. I think it should be replaced.

How do I initiate obtaining a replacement?

Is a Duet3D IR probe? Is it less than two years old? Where did you buy it from?
Here's the terms of the warranty: https://www.duet3d.com/page/warranty-policy

Ian

br7408

@droftarts Yes, it is Duet. Bought it through filastruder April 22nd 2023.

droftarts

@br7408 Please send an email to warranty@duet3d.com and CC your reseller. Include a link to this forum thread and the details of your original purchase. You'll receive a reply with a form to fill out.

Ian