Fans don't turn on/work
-
I had accidentally uploaded the wrong package for the config file then I uploaded the correct one for the printer. Question now that I have most of the things back into working order. Why does my thermostatically controlled fan not turn on when I have the hotend above 45C.
-
Also since I pushed the correct package for the config, the wifi turns on when I turn the printer on.
-
@Asabol said in Fans don't turn on/work:
Why does my thermostatically controlled fan not turn on when I have the hotend above 45C.
That will depend on which fan port it's plugged into and what your M106 fan config looks like. If you tell me that I might be able to tell you why it's not turning on. And if the configuration checks out good, there is a chance there is damaged mosfet or fan, but we'll cross that bridge when we get to it.
-
This is what M106 says in my config.
; Fans M106 P0 S0.45 I0 F20 H-1 ; set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off M106 P1 S0 I0 F20 H1 T45 ; set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on M106 P2 S0 I0 F20 H1:0 T45 ; set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on -
And which port are you using for the hotend fan?
-
I have that fan plugged into the first port of the always on which I think is incorrect. Then I also have the electronics case fan plugged into the other always on port and the part cooling fan into port 0 of the PWM fan ports.
-
There's your problem. The always on fan ports are always on, so they are not thermostatically controlled.
Part cooling fan to port 0 is correct and your config looks correct for that as well.
Connect your hotend fan to port 1 and it should be correct as well.
For the case fan, if you want them to turn on when you are printing at temp, connect it to port 2.
-
So I did that and now when it gets above 45C it still doesn't turn on. So what could be the issue then? Also should I add a picture to show how the cables are in the connectors. Meaning that they might be backwards.
-
Does the fan work at all when connected to the always on port?
-
No it doesn't
-
Do other fans work when connected to that always on port?
-
No any other ones won't turn on when connected to the always on ports.
-
The electronics case one used to but it doesn't anymore.
-
Ok, that means that either your fans are all dead, or there is either a blown fan fuse or damaged mosfet(s).
Do any of those fans work with any of the other ports?
Can you post some photos of the fan port area? Close up and well lit.
-
Here is a picture of the fan area. I think I might have the cables to the fans in backwards.
(image url) -
@Asabol If the fan cables are red and black the red cable is typically positive and black negative. If they use other colors it's less certain. What kind of printer is this? If it's a creality printer, then the part cooling fan has the yellow (+) and blue (-) wires, and the hot end heatsink fan has unterminated bare red (+) and black (-) wires, and the case fan has a terminated red (+) and black (-) wires.
The fans themselves usually have a + or - where the wires connect to the fans.
Unfortunately, reversing polarity on fans has a tendency to kill them.
Your photo isn't clear enough to see the fan mosfets.
See here for an example image: https://duet3d.dozuki.com/Wiki/Connector_and_spare_part_numbers?revisionid=HEAD#Section_Fan_mosfet
-
I am using a Creality Ender 3.
Here is a better picture for you to see the fan mosfets.
(image url) -
They look ok in that image.
It's possible that you've blown the fan fuse. It's located next to the fan ports and has a number 1 on the top of it. You will probably have to remove it and check it with a multimeter for continuity to check if it's blown or not if you can't immediately tell visually.
https://duet3d.dozuki.com/Wiki/Connector_and_spare_part_numbers?revisionid=HEAD#Section_Blade_fuses
-
Any tips on how to go about removing the fuse?
-
Ideally with a fuse puller, but pliers and firm wiggling should do it.
