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

I have tried to control the noctua fans when they were only plugged in with 12V, but it didnt work.

My solution was that what you both recommended, to get a 24V-12V DC DC converter for the 12V fans and wired them parallel. Then I wired the two 5v+ pwm parallel and plug them in Fan0 and that works greate.

Indeed, fans are really silent and have some more benefits , also it works to control them from 20 to 100%. I used a bigger version for radiators of my watercooled pc system where you need high pressure fans and that is the reason why I have chose it for my printer.

I have tried it yesterday, works perfect. Thank you for your help!

Hi all,

first of all I just want to say that I really like your Duet3D Wifi board, its greate to use and much better than my UltiBoard 2.1.4 before. So greate work!

I have a question about wiring two 4-wire pwm fans (Noctua) together that I can controll them both at the same time at Fan0. Regarding to this thread

https://www.duet3d.com/forum/thread.php?id=3947#p34601

I got some instructions how to do. I connected the two 12V fans in serie and pluged them in one of the "alwas-on" fan connector. That works fine, but without any pwm control of course. Then tried to connect both 5v+ pwm wires (one from each fan) paralell and put it in Fan0, so for right and left object cooling. Unfortunately, that didnt work. They started at 100%, but when I reduce the speed to about 80%, then one of them just stopped.

So my target is to put the two pwm fans together that I can controll both fans with the same pwm signal from F0. Acctualy like at hardware stuff, where you have e.g. the possibility to take a Y-adapter and then you are able to control two 4pin pwm fans at one 4 pin header.

I dont have much knowledge about electronics, but maybe one of you guys can give me a shot how I could do that.

Fan info: https://noctua.at/en/products/fan/nf-a4x20-pwm/specification

sen