Steppers on a shaper (was Re: Steppers

Lee,

I already replied to you offlist, but this post got me thinking...

It would seem MUCH easier to use a solenoid for this than a stepper!
You would use the same type of "pawl" setup that most shapers already
have. It would be relatively easy to rig a circuit for sending one or
more "clicks" per switch closure, and there is no need to deal
with "phases", just on and off... The need to Switch debounce could
prob'ly be eliminated as well.

Hope this helps,

Ballendo

--- In CAD_CAM_EDM_DRO@y..., "dave_ace_me" <davemucha@j...> wrote:
> Hi Lee,
>
> there are a more than a few circuit designs in the files section on
> the group.
>
> If you are planning on getting pretty exact movements to a part,
> using a simple software such as TurboCNC and a Gecko would give you
> finite control of the movement(s)
>
> This 'solution' is almost canned, whereas you will need to build a
> circuit and then trouble shoot it for your application. and it
would
> cost only a few dollars more than the build it yourself circuit.
> You will need to make all the stepper mounting, gearing, timing
belts
> power supply, etc regardless of how you control the stepper.
>
> You may find that you need to go 90% of the way to full CNC just to
> move the axis. and that last 10% is not adding a lot in costs.
>
> Have you figured out how much travel you will need to move the
table
> between cuts ?
>
> Software will allow you to get precision for multiple parts and
> multiple metals. I assume you might want to move somewhere between
a
> few thou to a a few tenth's of an inch in a single cut?
>
> Dave
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., "andrewyslee" <andrewlee@s...> wrote:
> > Hi Alan,
> >
> > Can't find your post on the 555 timer ciruit. Any pointers?
> >
> > Thanks
> >
> > Lee
> >
> > --- In CAD_CAM_EDM_DRO@y..., Alan Marconett KM6VV <KM6VV@a...>
> wrote:
> > > Hi Gene,
> > >
> > > Try a pulse generator feeding the stepper driver. You can
> buy 'em,
> > or
> > > build your own with a 555 timer or similar circuit. Seems I
and
> > others
> > > posted email and pix on this, probably a year ago?
> > >
> > > HTH
> > >
> > > Alan KM6VV
> > >
> > > Gene wrote:
> > > >
> > > > Is there a mechanical way to trigger steppers? I was thinking
> > about
> > > > putting one on the down feed on my shaper and triggering it
> with a
> > > > switch or something on the backstroke. Probably a stupid idea.
> > > >