RE: [CAD_CAM_EDM_DRO] AC servos

Hi Jon

Your not referring to grey code input drives by any chance when you say 2p.

We've had some discussion of this on the mach site, it seemed very strange
to bother with grey code, I was concerned we totally had the wrong end of
the stick.

Seems we might have found in you someone with experience of these which
doesn't surprise me, isn't much you haven't played with.



Regs Mark



Dr. Mark Vaughan Ph'D. B.Eng. M0VAU

Managing Director

Vaughan Industries Ltd, reg in UK no 2561068

Water Care Technology Ltd, reg in UK no 4129351

Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH, UK.
Phone/Fax 44 1872 561288

RSGB DRM111(Cornwall)

_____

From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Jon Elson
Sent: 06 July 2007 20:29
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] AC servos



Mark Vaughan wrote:

> Hi Graham
>
> It certainly sounds like they may well be step direction, though pulse is
> what they say, one would have thought they would of said step direction,

but

> Omron have always been funny people, a little on a different planet, there
> kit tough is pretty good, I've used loads of it over the years and never

had

> a problem.
>

Actually, they are Yaskawa drives, and everything is in
translated Japanese-speak. They call step & driecton two-pulse,
or 2P. That is because when moving in one direction, there
would be signals on both step and direction pins at the same
time. This is opposed to their "1P" which has a CW pulse and a
CCW pulse.

> They are definitely analogue input and your motors at 100W and 200W are
> probably small enough to run at reduced voltage (and thus speed) on a

gecko

Except that they are AC servo motors with proprietary encoders.

Jon





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