Connection 4028 fan with Octopus 1.1
Hi,
I open a topic to help those who want to connect a 4028 fan that never stops on an octopus 1.1
If I believe the documentation, you have to connect the black wire of the fan to the negative pin of a free slot of a heater cartridge slot.
Then you indicate the pin used in "printer.cfg" as indicated in the documentation.
Here is a schematic, is it right?
11 Replies
afraid-scarlet•2y ago
correct
afraid-scarlet•2y ago
perfect
rare-sapphire•2y ago
be sure the voltage jumpers are correct on the main board for your application. (24v/12v/5v)
Doesn’t the documentation not also mention to use the red wire on the same header as the blue wire?
No, but you can.
Then I misread, because that’s how I hooked it up atm. Or run yet since I am not done wiring fully.
It’s all good 😁
Maybe I asked about it here. Would have to search.
I am sure I didn’t just do it, because the header used in the documentation is an always on one, iirc.
Grmbl, so annoying.
“I’m suffering from memory loss for as long as I can remember”
yammering-amber•2y ago
just to clarify, no matter what voltage the fan is, should the pwn (on a 3/4 wire fan) always be set at 5v or the voltage of the fan eg 12v?
The PWM signal for the fan is 5V.
But the jumper doesn't do much, you're not using the positive wire.
Also a 3 wire fan does not have a PWM wire. It has +/- and tach. That's a very different thing, you'll have to treat that as a regular 2-wire fan. But be careful as many of them don't like to have power PWM'ed.