Re: CNC coil winder traverse

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Graham Stabler" <eexgs@n...>
wrote:

>
> Looking at the common lead errors I didn't think the accuracy would
> be up to it without direct feedback. The backlash also has to be <
> 0.01mm and I have not seen many ballscrews with really low lead and
> backlash errors.
>
> Graham

I have spoken to others who do coil winding, but I have not, so the
comments are not from experiance.
but, as you lay the wire, it tends to lay in the grouve, and you are
not postioning it 100% mechanically, but it is helping with the
alignment.



http://www.logwell.com/tech/servtips/mini_lathe_coil_winder.html
Syd is a great guy and very knoloweleglbel (I bet he knows how to
spell knowledgable too!)

Dave

>
>
> <davemucha@j...> wrote:
> > Hi Graham,
> >
> > If the loads are light, as one might imagine they are with thin
> wire,
> > considder a 10 TPI leadscrew with a 200 SPR stepper and a Gecko

and

> > direct drive.
> >
> > That is 200 steps times 10 microsteps for 2,000 steps per

rotation

> > and the leadscrew makes that 20,000 steps per inch. There is the
> > possibility of using a 400 SPR motor as well.
> >
> > At 2,000 SPR, that would be 0.0001 inches distance per step. the
> > 0.01mm distance you are looking for is about 0.0003937 inches, so
> the
> > stepper is close to 8 steps per wire thicknesss (0.02mm)
> >
> > sorry for not using metric, but I imagine you would be able to

get

> > something similar and in metric so your final numbers would

divide

> > exactly into wire thickness.
> >
> > Dave
> >
> > PS: what are the common Metric ACME screw pitches ?
> >
> >
> >