@T3P3Tony Got it, thank you

@T3P3Tony Just to confirm both the M929 and M118 lines would be added to config.g, correct?

@stef Ended up updating config for v3 and fan outputs are now working as expected. Thanks for the advice all

@droftarts Got it - yep I'm running v3 and config is for v2

@elmoret I was referring to hardware config - here is my config.g file: config.txt

@phaedrux The board is brand new... I tried all ports again with another fan and am still seeing the same problem, so It seems likely its an issue with the board itself rather than a config issue.

Hey @phaedrux, appreciate you reaching out - see below for more pics:

Closeup pic of ports:

Closeup with fans connected (Fan1 connector routes to hotend fan, Fan0 routes to part cooling fan):

Hotend Fan:

Part Cooling Fan:

Just Installed Duet on Railcore and powered up the printer. Fan 0 port does not work (neither hotend fan or part cooling fan works when connected here). Fan 1 and 2 appear to be set to 'always on', i.e. cannot vary fan speed via pwm (which is desired for the part cooling fan). Note that I've assembled and owned two other railcore printers and have never run into this issue. Anyone happen to have any thoughts on the issue here? Thanks.