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  1. #1
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    Need to add fan to control box

    Hello to all ,
    I am trying to add a fan to my set up but I am not too sure where it should go on this breakout board can some one help. I think the fan is 22 volt and I say that because with it powered up on the old bob it measures 22 volts with a multimeter

  2. #2
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    Re: Need to add fan to control box

    You want to connect the fan to the Break Out Board ( BOB)?
    Firstly,the fan will rated at 24VDC as that is a standard voltage. 22v is close enough.....
    Also, I would suggest it best NOT to power the fan from the BOB, if you can. Best to have the BOB on its own dedicated supply to reduce the chances of any electrical problems.
    these machines can be finicky.....

    Do you have a different 24VDC souce you can use?

    Just my 2c worth.....

  3. #3
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    [QUOTE=Sterob;2339548]You want to connect the fan to the Break Out Board ( BOB)?
    Firstly,the fan will rated at 24VDC as that is a standard voltage. 22v is close enough.....
    Also, I would suggest it best NOT to power the fan from the BOB, if you can. Best to have the BOB on its own dedicated supply to reduce the chances of any electrical problems.
    these machines can be finicky.....

    Do you have a different 24VDC souce you can use?

    Just my the machine came like that....getting its power from the break out board. I do have another option as you can see in the pictures the bob is the 1 that came with the machine I have switched it out with a new 1 the other pics r the possible power source what do u think ??

  4. #4
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    Re: Need to add fan to control box

    Yes, I'd use the power supply your using for the Steppers to run the fan.

  5. #5
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    Quote Originally Posted by Sterob View Post
    Yes, I'd use the power supply your using for the Steppers to run the fan.
    Ok what about running a 12v fan I need to run an additional fan and it is 12 volts how would i go about getting 12 volts

  6. #6
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    Re: Need to add fan to control box

    Ok I figured it out ...I have 2 12 volt fans I will just wire them in series and use the 24v supply

  7. #7
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    Re: Need to add fan to control box

    Sorry...got distracted....
    If you do that , if one fails they will both fail....I'd prefer to use somehting like this:
    https://tinyurl.com/r5ye6ej
    Use that to step the voltage down to 12V for your fan.
    These things are cheap and handy to have laying around.

  8. #8
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    Re: Need to add fan to control box

    Quote Originally Posted by Michael82 View Post
    Ok I figured it out ...I have 2 12 volt fans I will just wire them in series and use the 24v supply
    No, do not do that. The voltage will not divide evenly between them, so one unlucky fan will soon burn out, and then the other one will do the same.

    You need to either find 24V fan(s), or convert 24V to 12V. That can be easily done with a $2 buck converter:
    https://www.ebay.com/itm/DC-DC-Adjus...8AAOSwtaBcBhVD


  9. #9
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    Quote Originally Posted by Sterob View Post
    Sorry...got distracted....
    If you do that , if one fails they will both fail....I'd prefer to use somehting like this:
    https://tinyurl.com/r5ye6ej
    Use that to step the voltage down to 12V for your fan.
    These things are cheap and handy to have laying around.
    I see your point and a very good one I might add as i didnt think about that.

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