Re: [CAD_CAM_EDM_DRO] Re: Stepper on a spindle

On Thursday 12 January 2006 06:27 pm, James Washer wrote:

> A simple schmitt trigger will "square up" most any "wave"
>
> - jim

The output of a 555 timer chip is pretty square to start out with...

> On Thu, 12 Jan 2006 12:34:03 -0800
>
> Vlad Krupin <vlad.cnc@...> wrote:
> > In a pinch, one could use a 555 timer with a pot to adjust frequency.
> > Very small and cheap circuit. Yes, it won't really generate "pulses" as
> > such, but "waves", but that's OK for many controllers, because they'll be
> > happy with just detecting a rising or a falling edge. That's how I drive
> > the leadscrew on my lathe, by the way. A little primitive perhaps, but
> > works well enough for me.
> >
> > Vlad
> >
> > On 1/12/06, Alan Marconett <KM6VV@...> wrote:
> > > Hi Mark,
> > >
> > > Good to hear from you! If the spindle is driven by belt or gear, he
> > > can probably cut down on some of that microstep reduction needed.
> > >
> > > Dave M. and I have been working on a "stepper pulser" that might be
> > > helpful
> > > to those wanting a stepper driven spindle as well. It's just a little
> > > PIC to generate ramped steps for a stepper. It's also useful for a
> > > "power feed"
> > > for a lathe. The little side project was inspired by discussions on
> > > the E-leadscrew list recently started.
> > >
> > > Alan KM6VV
> > > 'been thinking about a stepper driven spindle.
> > >
> > > > Big problem is when you want to run "normally", that is, set
> > > > the spindle turning and keep it going forever while the other
> > > > axes follow instructions. But if it is supplied with steps from
> > > > an independent source, should be no problem.
> > > >
> > > > You'll want to think about steps/revolution...
> > > >
> > > > If you want resolution of .001, on a 10-inch diameter workpiece,
> > > > you'll need roughly 31,000 steps/rev; at 10-microstepping using
> > > > motor spec'd at 200 full steps/rev, you'll need a 20:1 reduction
> > > > ratio. Using Mach3 with 25,000 step/sec pulse rate, you'll get
> > > > spindle speeds in the area of 1/second or 60rpm.
> > > >
> > > > /mark who has been there
> > >
> > > Addresses:
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> > >
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> > > bill
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> > --
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> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> >
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> > timg@... Moderator: pentam@... indigo_red@...
> > davemucha@... [Moderators] URL to this group:
> > http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> >
> > OFF Topic POSTS: General Machining
> > If you wish to post on unlimited OT subjects goto:
> > aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it
> > if you have trouble. http://www.metalworking.com/news_servers.html
> >
> > http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
> > sister site to the CCED group, as many of the same members are there, for
> > OT subjects, that are not allowed on the CCED list.
> >
> > NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
> > DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill
> > List Mom
> > List Owner
> >
> >
> > Yahoo! Groups Links
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
> timg@... Moderator: pentam@... indigo_red@...
> davemucha@... [Moderators] URL to this group:
> http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
> you have trouble. http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
> sister site to the CCED group, as many of the same members are there, for
> OT subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
> DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........ bill
> List Mom
> List Owner
>
>
> Yahoo! Groups Links
>
>
>

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