Fan Controll Issue

Veti

The tool fan or hot end fan is always on and i don't want to control that, the parts cooling fan is connected to the pin in the diagram that i circled, and that's the one i want to control. I can not get them to come on at all anymore.

check that the fan is working by connecting it to the always on fan.

however, if you for example swapped the polarity by mistake and connect the fan, you can blow the mosfet. then the port will either stay on or off, depending on how the mosfet failed.

PeterA

Thanks, I didn't change the connections and it was working, I'm not sure. The first pin Pin0 failed a while back so if you say the config is ok then I guess i have a failed mosfet. Not sure if that's changeable, I've changed a few on my Arduino board.

Veti

issue
M106 P0 S1

see if the fan turns on.

if not. try fan2 port

Veti

and just to be sure. you restarted the duet after you made those changes?

PeterA

Thanks ill go try, the software rebooted the duet, ill try turn in off and on physically now

Veti

@PeterA said in Fan Controll Issue:

M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin
M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin e0temp

also B4138 is incorrect. find the correct beta value in your thermistor documentation.

PeterA

@Veti
OK, i don't have any issues with the hot end or bed heating up and maintaining temp, not sure i understand the connection with the fans?

Veti

@PeterA

its not connected. but an incorrect value with result in an incorrect temperature being displayed.

it could show 200 but the actual temperature could easily be 180

PeterA

@Veti said in Fan Controll Issue:

M106 P0 S1

OK ill look into that, but just to confirm its not related to the fan issue?

Veti

@PeterA

that command is to enable the fan to 100%

PeterA

@Veti said in Fan Controll Issue:

B4138

ok, after changing that the fans still don't come on at all. Ive put the jumper onto always on and the fans con on just fine.

Veti

@PeterA
no the beta has nothing to do with the fan

Ive put the jumper onto always on and the fans con on just fine.

what jumper?

PeterA

Ok.. so after plugging the jumper into always on then back to pin 1 they are now working????

PeterA

Must be like a faulty wiring connection.??

PeterA

Jip, everything now seems to work, I'll replace the connector, it looks OK but somethings off.

PeterA

@Veti said in Fan Controll Issue:

B4138

Thanks for your help.
Regarding the B4138, i don't have any documentation regarding that. Ive looked through old setups and that's the one that its always used. How could i test this is correct?

Veti

where did you buy the equipment?

and you never answered the question about what jumper you are talking about?

PeterA

Ill go see where it came from. Sorry not a jumper, I meant the connector from the fans that go onto the board.

PeterA

@Veti said in Fan Control Issue:

find the correct beta value in your thermistor

Evidently my hot end temp sensor
is as follows:
2M NTC 3950 100K Ohm High Temperature Resistance

Could i ask how and what setting to put in to the config.g for this?

Veti

@PeterA

B3950