[solved] FAN tool - vibration - bump white led (smart effector)



  • Hi all,
    Here something of simple for the experts.

    I have those fans and I'm using one of them for the nozzle tool:
    https://www.amazon.com/gp/product/B01MTA09QV/ref=ask_ql_qh_dp_hza
    Description:
    Model: AB5020H12
    Name: DC12V BRUSHLESS FAN
    Rated Voltage : 12V DC
    Operation Voltage: DC 10.8-13.2V
    Consuming Current : 0.13A(0.25A Max.)
    Consuming Power: 1.6W(3.0 Max.)
    Connector: 2pin-ph2.5
    Rated Speed: 6500 R.P.M.
    Max. Air Flow: 18.7CFM
    Iife Expectance: 70,000 hours at 25 degree
    Insulation Level: UL Class A
    Certificate: UL,CE,TUV
    Acoustic Noise: 39.0dB***
    DC Line Length : 120mm
    Rotation Direction: Clounter-clockwise
    Size:50x50x20mm
    Size:20g

    
    ; Fans
    M950  F0  C"fan0" T0 
    M106 P0 S1  X1 H1 T45 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on at 45degree - 0.3 is 30%
    M950  F1 C"fan1" T1
    M106 P1 S0 H-1 ; M106 P1 S0 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M950  F2 C"fan2" T2
    M106 P2 S0  H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off - 0.3 is 30%
    

    The Noctua 4cm x 1cm 12V work fine with thermostatic control enabled or at full power and without the frequency specified (what is for default?).
    This fan instead at full power won't start at all and in thermostatic mode either won't start , I have to spin it manually for make it turn but still it wont run normally. There is a sort of vibration (as for an on-off current).
    Then , more scaring, if I set the frequency Q(6500x5)/60=~540Hz the white led of the smart effector blink (the ones of 3 that light the part during printing). With no Q parameter it just won't start but the led work normally.
    If I set the fan as static <98% of it max speed , it work fine. (ex 45% or 60% and so on)
    The polarity on the smart effector is correct.

    There is a way for make this fan work? The air pressure at the same speed as the 4x1 cm is much more.

    Thanks for the support 😊



  • Boh, it seems to pulse.

    Any time I try to activate the fan it start to emit a hight sound trying to make the fan spin. At any pulse (or attempt to make the fan spin) the white led of the smart effector blink. It seems that it adsorb too much power , but is that the case? By the specs it shouldn't , right?
    If I help the helical to spin it start to spin emitting a similar hight frequency sound but I can feel a regular pulse in the frame of the fan.
    Both the fan work fine if I attach them directly to the PS of a computer.

    Any tips? Or check to do?


  • Moderator

    I think they may just be garbage fans?

    Try and get a good Sunon fan instead, there are many to choose from and all of good quality when bought from a quality supplier.

    https://www.digikey.ca/en/resources/international



  • I'm trying a Foxcon fan 5cm x 1cm and it's ok. Half the consumption and deep but have a good flow , at last.
    Seem that on the duet only those two fans have weird attitude. Probably... is not worthy waste much time make them work.
    Thanks for the link! I'll see for stuffs there 😁


  • administrators

    1. I suggest you renumber the fans so that fan 0 is the print cooling fan and fan 1 is the thermostatic heatsink fan. This is because fan commands generated by the slicer go to fan 0 by default.

    2. In the M106 commands that configure thermostatic fans, use S1 not S0. The S parameter is the speed to run the fan at when the thermostatic control is triggered, but if you specify less than S0.5 then S0.5 will be used.



  • Thanks DC! I'll do that 👍



  • Still here,
    I bought those fan Gelid 5 (x2):
    https://www.amazon.it/gp/product/B008S1DN66/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
    I have to say that they produce far less vibration of the Foxcon 50mmX10mm despite those are 50mmX15mm and they are even more silent.
    But I can't understand why I can't regulate the power with the X parameter.

    ; Fans
    M950  F0  C"fan1" T1 ; part fan
    M106 P0 S0 H-1 ; M106 P1 S0 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
    
    M950  F1 C"fan0" T0 ; tool fan
    M106 P1 S1  X1 H1  T45 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on at 45degree - 0.3 is 30%
    
    M950  F2 C"fan2" T2
    M106 P2 S0  H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off - 0.3 is 30%
    ;M106 P2 S0 I0 F500 H0 T50 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on - ho unito le ventole quindi questo non serve
    

    If I enable the X value as any number under 1 (0.9 , 0.8 etc) the fan didn't start and just pulse in the attempt to start to spin. As the pulse, the white leds of the smart effector also blink at the same time of the pulse.

    Those are the spec:

    • Silent Operation
    • Optimized Fan Blades
    • High Airflow & High Static Pressure
    • Long Lifetime (50'000 h MTTF at 40°C)
      Other Characteristics:
      Cable length: 0.45 m
      Depth: 50 mm
      Fan connector: 3-pin
      Fan diameter: 5 cm
      Height: 15 mm
      Maximum air pressure: 2.8 mmH2O
      Maximum airflow: 12.9 cfm
      Noise level (high speed): 23 dB
      Rated current: 0.15 A
      RoHS compliance: Y
      Rotational speed (max): 4000 RPM
      Suitable for: Computer case
      Type: Fan
      Voltage: 12
      Weight: 30 g
      Width: 50 mm

    Now, the board is capable to make the fan spin at full speed with and without the thermostatic value ON. But with the X less than 1 it pulse.
    Both the fan are new and not garbage.


  • Moderator

    Are you able to adjust the speed with S.08? Some fans just don't like being PWMd. Try a different frequency with F.



  • With the base of this M950 I tried this permutation of M106:
    M950 F1 C"fan0" T0 ; tool fan

    M106 P1 S0.8 X1 H1 ; (tried also with T45) didn't spin at all.
    M106 P1 S1 X0.8 H1 ; (tried also with T45) didn't spin at all.
    M106 P1 S0.8 X0.8 H1 ; (tried also with T45) didn't spin at all.
    M106 P1 S1 X1 T45 ; this is the only one that seems to work and make spin the fan without issue at full regime.
    Also tried to add F466 (def frequency) or F200 but didn't change a thing in any condition.


  • Moderator

    For testing use H-1 to disable thermostatic control. With H1 you are tying it to the extruder and you'll need to specify a temp with T for the fan to spin up.

    You can also add a B value for full power blip time since some fans need full power at startup to overcome resting state.



  • Ok , I'll try that soon as have finished to redesign the conduct.
    I tried the the Noctua NA-RC10 resistor and it in thermostatic mode became ultra silent, BUT lose too much flow.
    At first I thought that lowering the flow could avoid the turbulence close the bed , but I sorted out that I have to redesign the fan conduct and keep it at least 2cm more hight for solve completely the issue.
    Soon as I'll have finished it I'll post it here with full files on Thingiverse. Will be a good add-on for the Smarteffector.
    I'm adopting an asymmetric blades conduct for guide the flow. the prototype already work well but I want make a better revision.
    Thanks Phaedrux for your time. You keep always answering 😁



  • Ok,
    I found the culprit. Electromagnetic fields.
    I designed a new duct for the fan and everything worked fine , then I re-designed the duct for a more efficient flow and the fan now stay 5mm closer to the effector than before and tadaaaa , still this fan didn't want start. Same behavior.
    Some blink trying to spin and nothing else.
    So I took a common aluminium sheet (the cooking one) and bent on itself and finally placed on the perimeter of the fan and magically now it start to spin regular.
    20200623_005107.jpg
    20200623_005342.jpg
    20200623_005347.jpg
    20200623_005432.jpg
    20200623_005709.jpg


  • administrators

    I'm glad you solved it!

    Have you made sure that the ends of the magnetic rods have alternate N and S poles going around the effector? If they are all N or all S then the magnetic fields are less well contained and affect fans more often.



  • @dc42
    😵 I didn't even know I had to check this ... ok I'll have a look at it. Thanks as always for sharing knowledge 👍
    Edit: yep of course I had all N and S placed 😑 But it was easy alternate looking the stickers!


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