DIY coil winding machine


This will probably be more useful to custom speaker builders, but coil winding has always been a bit tedious. [iwicom] put together a simple coil winder using a hand drill, a magnet, a reed switch that triggers a pedometer. Aside from the coil winder, I love the idea of using the pedometer as a cheap event counter.

Comments

  1. tony says:

    great device, probably will make one myself if i can get around to it. also, i think you spelt Pedometer wrong the second time.

  2. joelanders says:

    pedometers are great.
    the local dollar tree has them for…. a dollar!
    they’ve got a simple mechanical “swinging weighted arm” switch, so it’s really easy to interface with it.

    i used one for a frame counter on a super 8 camera. another mod i saw for a frame counter used a calculator: set it up so that each time the “=” button is pressed, repeat the last operation. so “plus one” was the obvious counting operation.

    but seriously, if you can find them for a buck, stock up because the need to count things (quickly, or lots of something, especially) comes up a lot.

    and you get to play a game trying to walk less every day. heh. am i doing it right?

  3. hitch says:

    looks pretty ingenious, i like the use of the pedometer. dosent seem to mention anything about wire tensioning, but i guess thats done by hand as its wound.
    built a coil winding device for guitar pickups sometime ago, and trying to maintain constant tension on 42swg wire was a horrendous task.
    *shudders at memorys of steel tubes and springy things with pulleys on*

  4. Alex B says:

    I’ve also seen a cheap pocket calculator used to count events, type “+1″ then rig your switch to the “=” key. Might not work on all models, though.

  5. Adam Ziegler says:

    If anyone is interested, I did a software based (free) coil wind counter a few years ago. Look at the “Wind Counter”: http://pickups.myonlinesite.com/programs.php

    Input is accepted through a 9 pin serial port, and most people utilize a a reed switch to trigger it.

  6. Jose Pino says:

    Cool machine! When I created my homemade speaker, I had some trouble to make the coil. I hope I can build a coil winding machine and improve my speaker.

    http://www.josepino.com/other_projects/index?homemade-hifi-speaker.jpc

  7. John Bump says:

    Having built a lot of coil winders, I find it much easier to do this using power: drill a hole about 5″ in from the end of a mandrel, put a couple of 3/8″ sealed bearings (like from newer bicycle hubs: they can be thrashed) on the mandrel, clamp the bearings in the vice, and put a power drill on the one end of the rod. Stick a piece of wire through the hole and spin it up. You can use a pedometer or a rotation-counter. It’s way faster and easier on your wrists than using a hand drill, and after the first million windings, your wrists will thank you. Wear a glove on the hand guiding the wire onto the winding: if you get any skin caught between the wire going onto the winding and the winding itself it’ll just clip that chunk of skin right off and that leaves a big nasty hole.

  8. Dr Electro says:
  9. Dr Electro says:
  10. Geedavey says:

    Maybe not quite as hack-y, but a bicycle odometer would work quite well. Cheap ones are triggered by a mechanical cam-and-gear, higher-end ones by a magnetic trigger that you could glue (or merely magnetically attach!) to the crank gear. I also like Dr. Electro’s spinning reel winder; or a sewing machine bobbin winder would do a great job on smaller coils.

  11. ardinordin says:

    i have one genset capacitor induce type. my question is what happen if i change capacitor value from 20uf 300vac to 40uf 300vac.

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