Re: [CAD_CAM_EDM_DRO] Re: Smart Motor

This is an idea that's been around for many years and for the reasons stated
by Mariss it has not as far as I am aware found commercial favour. The other
problem is that of serviceability - the drive electronics are generally the
part that fails (due to being run closer to limits and having far less
overload capability than most motors) and to have to access them on the
back of a motor will just make life even more difficult.

Steer clear would be my recommendation.

Regards Peter

----- Original Message -----
From: "mariss92705" <mariss92705@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, January 26, 2002 3:10 AM
Subject: [CAD_CAM_EDM_DRO] Re: Smart Motor


> Hi,
>
> Couple of practical objections to the "smart motor" concept:
>
> (1) Why mount a motor drive that generates heat and needs to get rid
> of it against a motor that generates heat and needs to get rid of it
> as well?
>
> (2) Why should you replace a good motor when its drive fails, or a
> good drive when the motor fails?
>
> It is a cool-looking concept that makes no practical sense. I've had
> one motor manufacturer that wanted we build a drive for their motors
> that we turned down for those reasons.
>
> Mariss
>
>
> --- In CAD_CAM_EDM_DRO@y..., "methadras" <aymani@a...> wrote:
> > hi guys,
> >
> > i'm a big fan of this group and look forward everyday to reading
> all
> > the new posts to gleen as much info as i possibly can, so i can
> sound
> > smart to my friends who come over and point at my gear and
> go, "hey,
> > what's that...?" and then i say, "well, that's a blah blah blah"
> like
> > the charlie brown teacher... hehehe...
> >
> > anyway, i've finally decided to delve into converting my knee mill
> to
> > a CNC powerhouse... well, not so powerful... my idea is at least 3-
> > axis (x, y, and knee or should it be on the spindle...?)... so what
> > i've been doing is scouring the net and my motion control magazines
> > for good ways to make this happen... well, lo and behold i ran
> across
> > an old memory of the SMART MOTOR made by animatics
> > (www.animatics.com)... i find their ad and hit their web site...
> i've
> > called and left a message for a local rep to call me back... well,
> i
> > think this would be a good and fairly decently cheap solution for
> me
> > to convert to... i've a budget for my cnc conversion and its around
> > $3k, but it looks like with these smart motors i can save half of
> > that... the nema34 625 oz-in. servo motors i'm looking at are
> around
> > $500 each, but they are totally integrated drivers, servo amps, dc
> > power supply, I/O, etc. etc. and you can daisy chain or network the
> > motors together...
> >
> > my only problem in finding out from the rep or you guys is, do i
> need
> > a pc-based controller like a galil, delta-tau, etc. to send out the
> > proper signals to each motor or do i use an msdos based program
> that
> > turns my parallel port into a multi-axis controller...?
> >
> > i'm a big boy, so i can take any critiques that you guys may have
> > about this setup, but it looks like for me it would be the easiest
> > way for not having to build a box full of electronics and maintain
> it
> > whereas, i can just slap on the motors, plug in the juice to each
> > one, connect the communications I/O and that's it... what do you
> guys
> > think...
> >
> > Methadras
>
>
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