RE: [CAD_CAM_EDM_DRO] AC servos

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.

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,
however the omron drive is one heck of a drive by comparison, both in price
and specification, if they aren't step direction, I would use it in analogue
mode with a set of pixies P100 cards to convert step direction to analogue,
pixies are much cheaper than gecko's and have better access to parameters
for tuning and setup. I suppose you might be able to sell the omron drives,
by geckos and still have money in your pocket.



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 Graham Stabler
Sent: 06 July 2007 00:33
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] AC servos



I recently hit the jack pot on ebay with a pair of Parker linear
stages, one with 1M travel, the other 0.5M, square rail, ballscrews,
enclosed screws, really nice stuff and at a great price. I'll be
asking for some advice later on how to turn them into something
useful. You can see them on ebay auction 130128732978 but its hard to
make out what's what from the pics.

They have AC servo motors attached, both Omron, one is 100W and the
other is 200W, both 200v, both 13bit incremental encoders.

You can see them here:

http://omron-
<http://omron-industrial.com/en/home/products/motiondrives/ServoSystems/Rota
ryServoMot/default.asp>
industrial.com/en/home/products/motiondrives/ServoSystems/RotaryServoMot/def
ault.asp

SGMAH-02AAA4CD-OY
SGMAH-01AAA41D-0Y

I'd assumed that I'd take them off, replace with DC motors and use
geckos but I had a look at the drivers for them:

http://omron-
<http://omron-industrial.com/en/home/products/motiondrives/ServoSystems/Serv
oDrives/SigmaII/default.asp>
industrial.com/en/home/products/motiondrives/ServoSystems/ServoDrives/SigmaI
I/default.asp

And I noticed that there are pulse input versions of the drives. Does
this mean they could be used with step and direction signals?

I realize they are probably priced way above my budget but if they
could be used it might be worth saving an ebay search in case I get lucky.

Graham





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