Re: $250 machine pics

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "kz1927" <kz1927@y...> wrote:

>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, John Dammeyer <johnd@a...>

wrote:

> >
> > Hi John,
> >
> > Thanks. One of the problems I ran into was coupling the leadscrew
> to the
> > motor. Since my system was purely for positioning and not milling I
> made a
> > coupler that was threaded on one end to the same pitch as the screw.
> The
> > other side presses onto the motor shaft and is held in place with a
> > setscrew. A locknut prevents the leadscrew from unwinding. The

Stepper

> > bearings are used to hold things in place. (not the best I agree).
> >
> > I've posted a photo at http://www.autoartisans.com/cnc/leadscrew.jpg
> >
> > I've never really been able to get a decent connection with this

coupler

> > method. How did you connect your screw to the motor?
> >
> > John Dammeyer
> >
> >
> > Wireless CAN with the CANRF module now available.
> > http://www.autoartisans.com/products
> > Automation Artisans Inc.
> > Ph. 1 250 544 4950
> >
> > >
> > > Pictures at Flickr
> > > I think this is right
> > > http://www.flickr.com/photos/26361144@N00/
> > >
> > > these are prototype and apartial assembly.
> > >
> > > Thank -John
> >
>
>
> I'm glad you mentioned that.
>
> The motors have a washer in them that when direction changes
> will spring the shaft in or out just slightly.
>
> the leadscrew needs to be put between the support columns in such a way
> that it can't move from side to side at all. Not directly attached
> to the motor shaft. I used skate bearings to "lock" the screw between
> the columns...then carefully connect motor directly to the end of the
> leadscrew with a straight coupler.
>
> My circles were coming out not round and I watched what was happening
> for hours before I saw that.
>
> That's why my prototype machine in my pictures are "rigged up"
>
> If you need more info let me know and I'll get you some pictures.
>
> _John
>

I'm making you a diagram, bear with me.

-John