Is there a way to connect a 12v .065A fan to the DaVinci, having Repetier control it ?
Right now I use a manual rheostat controlling a 50mm blower fan mounted on the front of the Y stepper.
Would like something else to remember to turn it on and off , besides me.
I'm not an electronics expert, but can you do PWM on the fan with that relay? because it's more than an ON/OFF thing...
Forgot about the PWM aspect, as I'm running my add'l fan full speed at 12V.
A mechanical relay won't switch fast enough for PWM, but a solid state relay (transistor) will.
In the end, if you want a layer cooling fan controlled by Repetier, I think it's just worth getting a 5v fan instead. The airflow will be more influenced by the design of the fan shroud used than by the voltage, I think. I'm running a 50mm 5v fan with a decent shroud and it blows a lot.
Interesting solution... can you post some real pics of it installed?
Heres a spec sheet of the fan- [img]
Yes, if you use the extruder's fan wiring then you'll be able to control the fan speed programmatically via host or gcode.
with a solid state relay i think it might be possible? I've seen it work with my leds (measured with the current limiter driving them) so should work. I'm wanting to do this and use a 12v fan because i have a ton. kind of a waste of a relay though...we'll see, Ill report back
I think there's an echo in here. Try a smaller switching transistor... no need for a power rated solid state relay.