daArry

diy a transformer/inductor winding machine?
« on: December 12, 2004, 06:02:05 PM »
Hey...

Just had an idea whilst taking apart an old tape player (using the case to hold a psu) - could the left overs - such as the tape motor, digit counter etc be fudged together to make a transformer/inductor winding machine? you could just fst forward and watch the counter to see the amount of turns made...

Just a stab in the dark...

D


rafafredd

diy a transformer/inductor winding machine?
« Reply #1 on: December 12, 2004, 06:43:25 PM »
I´ve seen something about transforming old VCRs in winding machines, but WHERE?

electronaut

diy a transformer/inductor winding machine?
« Reply #2 on: December 13, 2004, 12:11:10 AM »
But doesn't the counter count length of tape, not revolutions of the reel?

asm

diy a transformer/inductor winding machine?
« Reply #3 on: December 13, 2004, 12:19:10 AM »
http://www.lollarguitars.com/winding_book.htm

http://www.stewmac.com/shop/Electronics,_pickups/Pickup_winding_and_repair/1/Schatten_Pickup_Winder/Pictures.html#details

alot of people i know wind pickups for guitars. they just salvage sewing machines from the dumpster. mainly because it has an adjustable speed (foot pedal!!). :razz:

you can find cheap digital counters on ebay for just a few bucks. or if you want to get crazy diy....

ive seen a guy take apart a cheap calculator, and soldered a couple of jumpers on and had it where everytime it made a revolution it would press the = sign.  a digital readout.
if your interested ill try and track that one down for ya.

now, most guitar pickups are about 5-10k winds. and i think trannys have ALOT more if im not mistaken


hope that helps a little.
t
...has a 'gold sputtered capsule for vintage sound'...

Steffen

diy a transformer/inductor winding machine?
« Reply #4 on: December 13, 2004, 07:10:01 AM »
I made a winder from an old electric screwdriver/drill.

added a infrared sensor, some transistors plus an impuls counter (1 euro @ evilbay)

perfect for small transformers and inductors.

steff








daArry

diy a transformer/inductor winding machine?
« Reply #5 on: December 13, 2004, 07:33:53 AM »
w0w! great stuff steff! Have u any pics of some iron/inductors you've wound with that jig?  :thumb:

Mark Burnley

diy a transformer/inductor winding machine?
« Reply #6 on: December 13, 2004, 07:38:30 AM »
Cool!

Yes, you can use a calculator very easily- just connect wires across the contacts for the "=" button, and before you start winding punch in "1+1". Each time the "=" contact is made adds 1 to the count. You can even store where you are up to in the memory! Some better spec calcs need to have "1++1" punched in to allow a "constant", but cheaper ones seem to work with "1+1".

It can be triggered by a few methods- contact switch (not good reliability), magnet with reed-switch, magnet with Hall-effect switch, or an infra-red sensor like Steffen's.

Tape counters usually have a small wheel below which has one-rotation-for-one-digit-count, so connecting the shaft of the counter directly to the winding shaft will give you a turns-counter. Most tape counters are just random measures to give you a positional indicator- most domestic/ semi pro types are just  run from a band on the right-hand takeup spool, and so the count actually varies in length as the spool gets fuller/emptier. Bigger machines counters (Studers etc) are run off a separate hub which touches the tape and has a slotted disk with two sensors run in quadrature to read tape-forward and tape-reverse length. A bit high tech for a DIY winding machine!

I use a small DC motor with a variable speed drive with a bit of Meccano!

 :thumb:

Mark
O_O tape is life O_O

Steffen

diy a transformer/inductor winding machine?
« Reply #7 on: December 13, 2004, 07:46:16 AM »
yeah I did that pocket calc thing with my "hand winder"



the infrared sensor triggered a relay which shorts the "+" contact on the calculator. but the countersetup was to slow for the turbo version :green:

@daArry I´ll post some shots of the stuff I did with the winder

steff


 

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