@dc42 yes i have read about this. i bought black paper build surface that it seems to work well with. im fighting z axes shutter right now... no printing at all.

Update: after the print I turned off the printer turned it back on and now the ir probe
shows 539 and not 538 when an object is close also now when it nears the bed at 464 it slows down and home s
perfectly. I did nothing just turned off then on.

We can solved for the moment.

@gbiski said in Ir probe results:

Can I ask what I do wrong ? I homed the Z with the Endstop. At the centre of the bed the distance was just equal to be able to drag a paper. So I guess the Endstop zeroed correctly.

Your Z homing s set up correctly if, when you home Z and then command the head to Z=0 and some suitable XY position, it just drags the paper. The position after homing is not necessarily Z=0, it depends on what you have in your homing files.

Ok ok, now I understand, as soon as possible I will do it and post data, thanks for the answers

Thanks.
I'm sorry I missed that, I used the reprap config tool for the Config.g file and wasn't even paying attention to the probe type in the command line.

If you purchased the sensor within the last 6 months, and the board hasn't been damaged physically, ask your supplier to replace it under warranty. Otherwise, is there a makerspace or similar in your area, where someone else may be able to help you replace it?

I can replace the LED, but unless you are in the UK then the costs of postage to and from me may make it un-ecomonic.

The ir sensor is the one sold on 1233d.nl. This one does not seem to be the same one sold on duet3d.com (picture looks different). I've ordered the one from duet3d and hope that one will work better, as even on the white PEI sheet, the results fluctuate.

See section "Connecting to Duet electronics" at https://miscsolutions.wordpress.com/mini-height-sensor-board/.

@dc42 Overall sheet thickness is 0.85-1.00mm with steel. So PEI should be ~0.5mm, but surface is rough and different colors (blue/white)