DC42 IR Probe - Only one time flashing and showing 1000

Sen

Hi all,

I have bought my second Duet3D Wifi board because of my new printer (CoreXY) and this time I used DC42 IR Probe. I have successful upgraded to firmeware 1.21, so my homex and homey work very well.

For the last two days I am trying to get the IR Probe correctly running but I am stucking there. When I start my duet board it looks like the red LED only flashing one time and of course I put the M558 to P1 but the zprobe value what I have got is only 1000 and it is slowly decreasing to 958 and stucking there. It change between 957 and 958. Also nothing happen when I put a paper below the IR Probe.

I did it step by step according to dc42 guide: https://miscsolutions.wordpress.com/mini-height-sensor-board/

The IR Probe is also showing no led light and when I try to homez I just get the message:

Error: Z probe already triggered at start of probing move
Error: G0/G1: insufficient axes homed

Following the IR part of my config.g:

M558 P1
G31 X0 Y30 Z2.003 P500

If I use Mode P2 then it is about 470-530 and the light at the probe is all the time red. But it dont seems that anything what I do, eg. put a paper below the sensor below, dont change anything.

and the homez:

G91
G1 Z5 F800 S2
M401
G90
G1 X120 Y125 F2400
G30
M402
G1 Z2 F200

So actually I am at the end of that what I know to check and maybe one of you guys could give me some help and support what I should do to solve this issue.

Thanks

dc42

Check the ground connection between the IR sensor and the Duet. Also check visually that the ground (centre) pin of the IR sensor looks properly soldered to the PCB.