Re: New Article Posted

Phil,

Thank you for the reply.

Snips, inserts below...

>In CCED, "Phil Mattison" <mattison20@...> wrote:
>
>It doesn't actually "require" the PPT0106, although it will be
>quite a bit easier if you use it.

Yes, that's what I wrote. Folks looking at the price of the drivers
should keep this on mind... (I think you have GREAT prices; just
don't want apples confused with oranges.)

>but realized it would be cheaper to consolidate certain functions
>into the breakout board. I kept them separate for better physical
>design flexibility when building a box.

Yes, as I said I applaud your "lines of division"...

>The drivers are based on the SLA7062M, which by the way does not
>have a full-step mode,

Yes, corrected my error in the follow-up post.

>but does not lose any steps when in sync mode. I've been using this
>setup in half-step mode for months and have not had any problems.

Yes, in HALF STEP mode it will work fine. BUT you WILL lose steps if
you try to microstep whilst using the sync mode. (or going into and
out of it).

So anyone using these boards will need to turn OFF microstepping, OR
the auto current and noise reduction. Can't use both without losing
steps...

Unless you've done something special with your PIC, as I wondered
earlier???

Thank you in advance,

Ballendo

> ----- Original Message -----
> From: ballendo <ballendo@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Saturday, May 06, 2006 8:08 PM
> Subject: [CAD_CAM_EDM_DRO] Re: New Article Posted
>
>
> > Hello,
> >
> > I too, appreciate your drives and the design "philosophy" of
> > minimising the drive board components and stuffing the "breakout"
> > portion.
> >
> > Your "division of labor" makes the driver boards less expensive,
> > but "requires" the use of your pport board. (Folks should realise
> > that using the drivers without your pport portion will be <much>
> > harder than using other integrated drives.)
> >
> > Quick question: Does your pic only allow going into Synchronous

mode

> > on full steps? (Because otherwise you'll lose steps going into

and

> > out of sync mode with Allegro chips.) Since we cannot know in
> > advance when a "final" step is coming, I'll be interested

inhearing

> > how youdoeal with this?
> > (I'm guessing you're using Allegro chips from the pinouts and
> > pictures which show traces and rivets in "familiar"<G> places.)
> >
> > Thank you in advance,
> >
> > Nice products!
> >
> > Ballendo
> > > > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Phil Mattison"
> > > > <mattison20@> wrote:
> > > > >
> > > > > For anyone who might be interested, I've posted an updated
> > article
> > > > on my web
> > > > > site about how to Build Your Own 3-Axis CNC Stepper Control
> > > > System. This<snip>