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    LATEST SMOKER EXPERIMENTS, REDUCING SIZE & NEW BITS
    by jbkiwi πŸ‡³πŸ‡Ώ ( Captain)
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    jbkiwi
    Captain
    πŸ“ LATEST SMOKER EXPERIMENTS, REDUCING SIZE & NEW BITS
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    Country: πŸ‡³πŸ‡Ώ New Zealand
    Online: 7 hours ago
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    Re - As for "air collector" I suspect that the amount of air being pushed into the container by the fan .

    Probably correct in one part Mike, but it works fine in the open air (only a 6v fan,- see vid More Smoker Stuff 2, - 20 days ago), I think it just doesn't get enough air in this application as the motor space is not very well vented and also as you said, not enough air getting out the other end.
    JB
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    G6SWJ
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    πŸ“ LATEST SMOKER EXPERIMENTS, REDUCING SIZE & NEW BITS
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    I don't have any pics right now.

    See the post I made about the fan specifcation

    I mount the vape tank in a box, the vape outlet exits through the box and the fan vented to the outside world

    _._
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    G6SWJ
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    Hi,

    I apologise - I gave an incorrect link previously - should have been this one

    https://uk.rs-online.com/web/p/axial-fans/8621595/

    Yes they are expensive £19 (I am using 9 of eveything in my build - the ££££ - ouch) but when you power them up you realise why - they are unlike many fans you will come across - they have some real grunt and the air volume they move is awesome - leave them running face down on a desk and they will almost take off!!!

    Spec - an Air Flow 36mΒ³/h and high static pressure (they can move static air quickly from startup =grunt)

    Many fans (computer type - black case) have 4 wires. This normally indicates that they have an inbuilt speed controller and often a speed sensor output.

    The inbuilt speed controller uses a square wave signal @ 25khz - you vary the duty cycle of the PWM signal to change the speed - this is an industry standard spec

    You may well hear you computer fan run at different speeds - that will be using the system described above

    So the catch is how you get your 25khz control signal - I use a standard microprocessor board to supply the 25khz signal. I am able to remotely change the speed of the fan to shape how much smoke is exiting the system

    _._
    https://uk.rs-online.com/web/p/axial-fans/8621595/
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    mturpin013
    Lieutenant Commander
    πŸ“ LATEST SMOKER EXPERIMENTS, REDUCING SIZE & NEW BITS
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    Hi G6, the fan you mention seems a little expensive, and you say it has an inbuilt controller but I coudn't see it in the advert, or was it the one further down the page? and I'm not sure I understand the 25Khz PWM signal bit
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    mturpin013
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    Martin, I can still adjust the incoming air volume via the ring as my aluminium addition is a press fit on that ring, However I so far have just used it at 100% as the volume of smoke can be adjusted by varying the power side of the unit.
    As for "air collector" I suspect that the amount of air being pushed into the contaner by the fan is far in excess or the volume of air that can be pushed through the exit pipes. This being the difference between a fan and a pump, a pump will pressurise a container, whereas a fan will not and therefore the smoke is forced back through the fan.
    just a thought
    1
    jbkiwi
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    Any pics of fan air 'collector' into smoker? I tried using a 12v fan and once everything was closed in I found that smoke came back through the fan ( any back pressure, ie long hoses lack of air in, causes fan cavitation and lack of thrust, letting built up smoke back into the boat.
    JB
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    jbkiwi
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    Re - With all of these smoker experiments i have noticed that there has been no mention

    Same with mine Martin, it's run fully open for max airflow. The alloy tank version I made just has the coil on a bracket so no coil base or tank base, (very simple and seems to work just as well really)
    Air from the pump just goes into the box and comes out through the element which is up against the exit pipe stub (comes inside a few mm).
    JB
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    G6SWJ
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    Just a quick note - the fan speed control is a 25khz PWM signal - nothing to do with RC ESC!

    _._
    RNinMunich
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    Country: πŸ‡©πŸ‡ͺ Germany
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    Many thanks for the Link K, πŸ‘
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    Young at heart - slightly older in other places πŸ˜‰ Cheers Doug
    G6SWJ
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    Yes - I have mine 100% open to get maximum air flow.

    I can then control the fan speed to control air flow

    The fan I use is a wee beastie - would not go amisss in a hovercraft - the fan has an inbuilt speed controller

    https://uk.rs-online.com/web/p/axial-fans/7815048/

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    https://uk.rs-online.com/web/p/axial-fans/7815048/
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