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12v Fan for hot end..

Posted: Fri Oct 13, 2017 7:28 pm
by Bobbystone
Hey, How do I use the OPT fan circuits on the Felix 3.0 board to power a 12v extruder fan?

Thanks

Re: 12v Fan for hot end..

Posted: Sat Oct 14, 2017 9:28 am
by Dreide
Bobbystone wrote:Hey, How do I use the OPT fan circuits on the Felix 3.0 board to power a 12v extruder fan?
Not sure if I understand the question. Just connect it to OPT instead of MAIN (like shown in the assembly manual for the dual extruder). See also http://www.felixprinters.com/forum/view ... 6825#p6825.

Re: 12v Fan for hot end..

Posted: Sat Oct 14, 2017 7:57 pm
by Bobbystone
I have it hooked up to the opt output. Doesn’t seem to be any voltage

Re: 12v Fan for hot end..

Posted: Sat Oct 14, 2017 11:04 pm
by Dreide
Bobbystone wrote:I have it hooked up to the opt output. Doesn’t seem to be any voltage
Provided the fan is working, and I guess it does, the problem is probably a faulty output transistor. See also http://www.felixprinters.com/forum/view ... =11&t=1652.