Hotend Fan not working on active Heater but on Standby Heater

Ukunz

@Phaedrux : I skipped heater 1 cause i use Extruder 0 for my second Z_Axis. So thought:
Bed - Heater 0,
Extruder 0 - Heater 1, <- not in use (U Axis-Second Z)
Extruder 1 - Heater2

I now switched to:
Bed - Heater 0,
Extruder 1 - Heater1 - Tool 0

Same behaviour: Temp readinga are fine; Fan1 spins up at 45°c when i set the target Temp to Standby 50°C, but Fan1 does nothing when i set target Temp to Active 100 °C or start a print Job and the Temp rises above the 45°C. But when I then cancel the Job the Fan immidiatly spins as long as the Temp is above 45°C. Strange

Rick

Changed config.g:

; Configuration file for Duet Maestro (firmware version 2.03)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2.1.8 on Fri Mar 27 2020 18:51:00 GMT+0100 (Mitteleuropäische Normalzeit)

; General preferences
G90                                     ; send absolute coordinates...
M83                                     ; ...but relative extruder moves
M550 P"Anycubic I3Mega"                 ; set printer name

; Network
M552 P0.0.0.0 S1                        ; enable network and acquire dynamic address via DHCP
M586 P0 S1                              ; enable HTTP
M586 P1 S0                              ; disable FTP
M586 P2 S0                              ; disable Telnet

; Drives
M569 P0 S0                              ; physical drive 0 goes back
M569 P1 S1                              ; physical drive 1 goes forwards
M569 P2 S1                              ; physical drive 2 goes forwards
M569 P3 S1 				; physical drive 3 goes forwards
M569 P4 S1                              ; physical drive 4 goes forwards

;DUAL Z
M584 X0 Y1 Z2:3 U3 E4 P3


M350 X16 Y16 Z16 U16 E16 I1                     ; configure microstepping with interpolation
;M350 X64 Y64 Z64 U64 E16 I1                    ; Configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 U400.00 E388.4297521  ; set steps per mm
M566 X900.00 Y900.00 Z12.00 U12.00 E120.00      ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z500.00 U500.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 U20.00 E250.00      ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 U800 E800 I30               ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                         ; Set idle timeout

; Axis Limits
M208 X-5 Y-5 Z-2 S1                      ; set axis minima
M208 X220 Y220 Z180 S0                   ; set axis maxima

; Endstops
M574 X1 Y1 Z1 U1 S0                      ; set active low and disabled endstops

; Z-Probe
M558 P9 H3.0 F200 T6000               ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y-25 Z2.27                ; set Z probe trigger value, offset and trigger height
M557 X10:205 Y10:180 P5               ; define mesh grid

; Heaters
M305 P0 T100000 B4138 R2200  ;H0        ; set thermistor + ADC parameters for heater 0
M143 H0 S120                            ; set temperature limit for heater 0 to 120C
M305 P1 T100000 B4138 R2200  ;H1       ; set thermistor + ADC parameters for heater 1
M143 H1 S260                            ; set temperature limit for heater 1 to 260C

; Fans
M106 P0 S0 I0 F500 H-1 C"Part Cooling"     ; set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
;M106 P1 S1 L1 I0 F500 H2 T45    	           ; set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on              
M106 P1 T45 S1 H1

; Tools
M563 P0 D0 H1 F0                        ; define tool 0
G10 P0 X0 Y0 Z0                         ; set tool 0 axis offsets
G10 P0 R0 S0                            ; set initial tool 0 active and standby temperatures to 0C

;Pressure Advance
M572 D1 S0.4 

; call NetworkStartup
M98 Pstartup.g

; load config override
M501

Phaedrux

M106 P0 S0 H-1 B0.5 C"Part Cooling"                             ; Set fan 0 (Part cooling blower) G-code controlled. Thermostatic control is turned off
M106 P1 S1 H1 T45 C"Hotend Fan"                        		; Set fan 1 (Hotend fan) Thermostatic control. Turns on when hotend reaches 45c
M563 P0 S"Titan Aero" D0 H1                             ; Define tool 0

Here's my fan and tool definition for comparison.
I don't even specify F0 since it's the default.
Try to mimic mine and see how it goes.

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