12V fan on 24V duet 2 wifi + duex 5 running RR firmware 3

marc8991

Hey guys,

I'm running 24V on my duet 2 wifi with RR firmware 3.0beta12.

I want to connect a 12V print cooling fan to the duex5 now since it can convert the 24V to 12V for fans. I can't seem to get that to work.

I've changed the jumper of "V Fan Fumper Select" to the middle position (12V) and then connected the fan to the FAN3 pin.

After that I have added the following to my config.g

M950 F1 C"duex.fan3"
M106 P1 S0

As tool definition I put the following:

M563 P0 D0 H1 F1

I can't get the fan to work this way. I have checked the voltage at the "duex.fan3" pins and they don't seem to be getting 12V at all (multimeter says 0V).

Any advice?

Thanks!

Phaedrux

Are you sending M106 P1 S1 to turn the fan on first?

droftarts

@marc8991 do you have a jumper on INT 12V EN on the left of the board? See https://d17kynu4zpq5hy.cloudfront.net/igi/duet3d/3wbm6g2qRUBfSHgw.huge
You can check for 12V on the pins next to it.

https://duet3d.dozuki.com/Wiki/Duex_wiring_diagrams#Section_Warnings_and_Cautions

In order to use the 12V internal supply for LEDs/FANs the 12V EN jumper must be fitted. Do not fit this jumper if you are not using the 12V internal supply

Ian

marc8991

This I have somehow missed - currently there is no jumper on those pins! I was getting crazy trying all sorts of things to get it to work. Thank you guys!