Re: [CAD_CAM_EDM_DRO] Re: CNC coil winder traverse

Hi Graham,

A HP scanner might also yield a good mechanism for the transverse
hardware.

Alan KM6VV


Graham Stabler wrote:

>
> Carlos,
>
> The normal way to guide the wire is with a special wire guiding
> tube. They can be bought from specialist companies and are not all
> that expensive. They are really just a hardened tube with rounded
> edges, sometimes they have wire cutters built in too.
>
> Yes the wire will do what it wants to some degree. The tube will
> need to be very near to the coil and again I stress the main factor
> will be consistancy. The wire tends to wind itself neatly the
> problem comes mainly on direction changes, the wire must be wound in
> odd then even numbers of turns on each layer. I suspect that in
> practise my main problem will be making a bobbin assembly with
> retactable central spindle that goes together in exactly the same way
> every time.
>
> One thing I had considered if I could make the system repeatable
> enough would be to wind the first coil ultra slow and have some sort
> of manual overide to teach the winder what to do.
>
> CD ROMS have high resolution but much of that comes from the magnetic
> actuators that control the focussing lens, they use feedback from the
> photodiode to keep in the tracks so I doubt it would be much good for
> a wire traverse.
>
> Sheldon, Both of my HP inkjets have a servo system with belt drive.
> They are essentially where I got the idea from. The encoders are
> mylar linear ones much like those sold by USdigital.
>
> Graham