Snail blower fan

Discussion in 'Build Help' started by Alex Stevenson, Mar 25, 2016.

  1. Alex Stevenson

    Alex Stevenson Well-Known Member

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    Just got another issue (starting to think I'll never finish at this rate!) - on the print cooling fan. Sorry for the blurry photo - hopefully you can see that the white cable wasn't attached. To be frank, the fan doesn't really inspire confidence, and will definitely need to support the wires when it's reattached.

    Question is, there are three solder points and two wires. Can anyone confirm which of these I should solder the white cable to?

    Thanks again

    IMG_20160325_120711.jpg
     
  2. Mike Kelly

    Mike Kelly Volunteer

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    The middle one is probably the tachometer. Should be the right. Not near my bigbox at the moment but measuring the resistance across the pins is a pretty good way of telling.
     
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  3. Stefan

    Stefan Well-Known Member

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    I had the same problem... but i was lucky I have a dual so checked the 2nd.
     
  4. Ephemeris

    Ephemeris Well-Known Member

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    I had the same problem. White wire was not attached. Is this some weird QA issue or a coincidence?
     
  5. Alex Stevenson

    Alex Stevenson Well-Known Member

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    Thanks - do you remember which was the correct point to solder it back?

    I was also just about to write to say that I'd measured the resistances, and I it measures OL between the two outside points, but black and the middle one measured a resitance. Not sure what I'm looking for though...
     
  6. Alex Stevenson

    Alex Stevenson Well-Known Member

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    It seems like a QA issue. The wires didn't have any strain relief, and perhaps weren't soldered well to begin with. I'll likely add some hot glue to hold them in place when I've got it wired up correctly again... when I'm confident I've got it right...
     
  7. Ephemeris

    Ephemeris Well-Known Member

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    Alex, Here's what my fan IMG_1259.JPG with intact leads looks like. (As opposed to the one I repaired.)
     
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  8. Stefan

    Stefan Well-Known Member

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    Nice touch with the tape to bent the sticker :)
     
  9. Alex Stevenson

    Alex Stevenson Well-Known Member

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    Thanks for the photo @Ephemeris, that really helped. Resoldered it now, and added some "hot snot" for good measure (although the bracket holds the cables firmly anyway).

    It ain't pretty, but the multimeter indicates no shorts between the solder blobs,
    and continuity through the wires, so should be good to go.

    IMG_20160327_134704.jpg
     
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