Re: Thought I had it figured out!!

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Ed Fanta <atex57@m...> wrote:
Ed;
Thanks for the info. I'm going to use the 320's and I just read the
set up sheet that came with the shipment and it does state not to use
a power supply higher than 5 volts above the motor rating (duh). I
guess I should have figured out that the servo is nothing but a dc
motor with an encoder. But, I'm bein cautious. Don't want to
replace things right away. My transformwer has a 25 volt output
which will yield a 35 volt dc output. Is there a loading resistor
circuit I can go with to knock it down to 30. I don't want to
regulate the supply as it seems not the way to go! Thanks for all
the help.
billyjack>
Whoa there!! Steppers get the higher voltages not servos!! Servos
should
> be used with the same or lower voltage as its rating, sometimes a
little
> higher on a motor with a high resistance in the armature. Which
Gecko
> are you using?
>
> pug_harley_corvette wrote:
> >
> > Hey Guys.
> > I've been reading the archives both here and the other forum and
need
> > a
> > bit of clarification or maybe just a simple explaination. I'm
trying
> > to figure out the voltage relationship for my future cnc setup. I
> > want
> > to use servos, gecko amps, and the associated power supplies. My
> > question,......please help me understand the power supply size
verses
> > the servo voltage requirement (of course current requiremetns
also).
> > The geckos may utilize a supply voltage between 24 and 80 V.
> > According
> > to their power supply document, the power supply should be 3 to 25
> > times the servo voltage. Well, I have 30 volt servos which
draw .65
> > amps (wimps I know but trying to source larger motors). I've
> > procured
> > a transformer which has a 50V ac output and high current (unknown,
> > but
> > this thing is a monster). That will give me a 70V DC voltage to
work
> > with. This means that I'll not meet the 3X voltage requriement
for
> > the
> > servos and cannot tap off a higher voltage from the transformer
with
> > the geckos (80V max). Should I be trying to source lower voltage
> > servos. I thought 30V was pretty low! Anyway, I need some help
> > understanding how these things work.
> > Thanks in advance and sorry for the elementary questions.
> > slightly confused.....billyjack
> >
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