SLPD you might want to head over to http://music-electronics-forum.com/f...splay.php?f=11 and ask around there. More likely to find someone in the UK who can help. The pickup winder guy are a pretty touchy bunch -tread lightly...
everyone seems agreed on using a stepmotor for the width guide my winder is for transformers &spkr coils a reedswith on the windmotor spindle return end swtches on the width guide use both contacts on the reed switch and
connect to a pair if logic gates 4011 output is then clean logic 1/0
next i use a 555 timer circuit with the end return swiches that changes monostable state from 1to0 and lites a red or green led the stepmotor driver
is pretty standard with step and dir lines
wind speed and acceleration are irrelevent at this stage if the guide is relative to EACH SINGLE TURN with me sofar?
two ways (mabe three) to go from here;
1 'iterface with a computer ,program calculates from your trackrod pitch how many steps requied for your wiresize counts a turn and sends pulses to the
guide motor mabe even stops the wind motor on completion of the coil
2, i made a presetable indexer that counts from 1 to 98 the 4017 chip
3 put this on a pic chip
nuts and volts magazine coilwinder
byte magazine taking the first step (feb 1978)
me i will send the circuit
Why is a stepper motor needed to build pick-ups? Isn't a sewing machine motor with a simple counter going to do the same for far less expense? I purchased a book awhile back that has plans to build such a pick-up winder, and it looks quite simple compared to going to stepper solutions. Shatten also sells a winder similar to this simple design. What am I missing?
Maybe an endless screw like they use in fishing reels like ABU it will spread the wire smooth.
keep it simple any kind of a small variable speed motor will do 1000rpm is plenty, go with scatterwound, hand tensioned and distributed layers sound much better, just listen to an old strat pickup compared to the new ones. there are many integrated counter chips that you can hook to a seven segment display, try Maxim for a free sample. use an optoisolator to trip the counter reed relays are unreliable.
LOUD , ROCK IT VERY LOUD !!!! YEAH!!!
use the same number of turns for each coil and pay attention to magnet polarity and coil wind direction, otherwize it may not be humbucking if you want to experiment with mismach coils put in a coil tap at 1000 turns one at 7000-8000 nd finish it off with 10,000. with a little clever switching you can do series or parallel wiring and phase reversal. Also you may want an op amp on the 1000 turn coil to equalize the output. it will give you an almost acoustic tone. Try a Burr-Brown OPA627. for my money it is the best audio op amp there is. you can also go all active using inverting and non inverting configurations, see any good op amp book for schematics. You can also combine single coils from both a bridge and neck pickup into a seperated humbucker, again watch the polarities and turn directions, normally they are series connected but parallel is also possibe with a very different sound.
Magnets make a big difference in sound you can build a fairly accurate gauss meter with a linear hall effect sensor and a digital volt meter. radio shack offers both calibrated, and non calibrated sensors which are much cheaper and probably closs enough for govt. workand can be built for under ten bucks if you already have a meter. Many of the old strat pickups use alnico2 which are not as strong as the 5's, they sustain better because of less drag on the strings, string drag is a big problem with neodymium or samarium magnets, they need to be small or they willl suck the energy from your string. Mojo has a nice selection of magnets wire and other pickup parts.
i just found the forum.. and im not going to read all pages, but i have to say the origional idea is pretty dumb.. a CNC pickup winder? come on.. and two motors? one to guide a wire? sewing machines have been guiding thread for 100 years without the use of a motor..
all you need is a bearing for it to roll over, and second, what is CNC going to do?... how do you plan to CNC a winder when its nothing but a steady rotation?...
an electric motor out of a box fan, something to count RPMs and an automatic shutoff and youre done.. oh, and maybe a single arm made of not much more than a coat hanger with a sleeve over it to guide the wire
The device you've outlined would be good for making very "regularly wound" pickups, that is, pickups consisting of even, symmetrical coils of wire, uniformly spread from one end to the other. This type of winding looks good, but produces a pickup that doesn't sound very good.
If the pickup is wound irregularly, it can sound quite a bit better. The problem here is how do you define "irregularly"? Wouldn't it be good if you could experiment with different kinds of irregular winding, play some music on the pickup, and then refine and/or simply duplicate the winding you ended up liking the best? To do that, you need some sort of repeatable control over the winding process. Repeatable control is what CNC is all about.
So there you have it! Years from now, when thousands of experiments have yielded your ultimate pickup, it will all be worthwhile when Bruce Springsteen calls you up and says: "Justin, baby, you are the MAN! I've gotta have a dozen more of your SlamWhacker 5000 ultra-hot-wind pickups! Send me a bill!!!"