On my i3 i have the ramps 1.4 board and it is not using the D9 relay. Is that for a cooling fan? If not how do set it up for one (or can you) ? i have been trying to get better with arduino but still not that good. lol
I fixed your image link.
Thinks,Do you know what pin D9 is trying to set up a cooling fan,and i guessing the fan needs to be 24vdc like the bed and hotend.
D9 is for the part cooling fan, not the hotend fan (that's usually always on, direct wired to power supply) as shown in the pic. And yes, the fan needs to match the supply voltage.
Yes that what i have. Part cooling fan is what im trying to set up. The fan that is running all the time is the hotend fan.
That's what I figured you were trying to do, was clarifying from the image posted that showed d9 for extruder...
i got it. Ihad the fan wired backwards. Fixed that and it works