Hotend Fan not working on active Heater but on Standby Heater

Phaedrux

Also, what firmware version?

Ukunz

Ok i will try, thx for ur help

Here's what i read :
M122
=== Diagnostics ===
RepRapFirmware for Duet 2 Maestro version 2.05.1 running on Duet Maestro 1.0

Ukunz

It works.

i just copyed your P1 def. to my config.g ... that does the trick.
thank you very much for your help

Rick

Ukunz

Ok, im Back.. theres still some strange behaviour. It Seems that the Fool Fan not run's as long as the target Temp isnt reached. Like M106 P1 S1 H1 T45 -> Tool fan should start at 45 °C but if Target Temp is set to 190°C it will not start unless roundabout 180°C are reached. I dont understand that behavior. Can somone explain that?

Rick

dc42

@Ukunz said in Hotend Fan not working on active Heater but on Standby Heater:

Ok, im Back.. theres still some strange behaviour. It Seems that the Fool Fan not run's as long as the target Temp isnt reached. Like M106 P1 S1 H1 T45 -> Tool fan should start at 45 °C but if Target Temp is set to 190°C it will not start unless roundabout 180°C are reached. I dont understand that behavior. Can somone explain that?

Rick

That's not right. I suspect a bad connection that fails at low temperatures, or a stuck fan. Try the following:

Send M106 P1 and check that the response indicates the thermostatic temperature really is 45C
Set the temperature to 50C or 60C so that the fan should be on. Assuming the fan doesn't turn on, send M108 P1 H-1 to disable thermostatic mode, and see if it turns on or not.

aidar

@Ukunz said in Hotend Fan not working on active Heater but on Standby Heater:

Like M106 P1 S1 H1 T45 -> Tool fan should start at 45 °C

Your tool fan is fan 0, isnt it? Means part cooling fan and its controlled by gcode, not temperature. It will not run unless you command it ( or printing gcode does) to do so.

Ukunz

@aidar no my tool fan is on fan1 the part cooling fan is on fan0

Ukunz

@dc42 I will test this

aidar

@Ukunz said in Hotend Fan not working on active Heater but on Standby Heater:

no my tool fan is on fan1 the part cooling fan is on fan0

Now we are messing with words here. Tool fan (what you define with M563) and part cooling fan is same thing, as long as you have one tool. So your tool fan is Fan 0, and Fan 1 is hotend cooling fan, witch is in your case thermostatically controlled and should go on if hotend temperature is above 45 C

Ukunz

@dc42

first: 17:27:46

17:27:37
M106 P1
Fan 1 (Hotend Fan) pin: F1, frequency: 250Hz, speed: 100%, min: 10%, max: 100%, blip: 0.10, inverted: no, temperature: 45.0:45.0C, heaters: 1, current speed: 0%:

ok thats whats happens:

Temp. of the Hotend is about 25° set the target Temp to active 130 temp reaches 80-90 still no fan on but:
17:27:50
M106 P1
Fan 1 (Hotend Fan) pin: F1, frequency: 250Hz, speed: 100%, min: 10%, max: 100%, blip: 0.10, inverted: no, temperature: 45.0:45.0C, heaters: 1, current speed: 100%:

i send : 17:27:52
M108 P1 H-1

fan still off

temp reaches 120 to 130° Fan comes on on Full speed

Ukunz

Oh Im so dumb... everything is fine now..

I switched + and Gnd from the heater ...and on the Anycubic there must be a connection from the gnd of the heater to the fan ground ... so as long as the heater is on full power there is no real ground for the fan (raised up)... as soon as the pid kicks in the ground comes lower and the fan works.

so i corrected + and ground of the heater and everything works as expected

Many thanks to all of you

Rick