RE: [CAD_CAM_EDM_DRO] Re: gecko's and voltage

You miss the point, Tim. In a retrofit situation, customers must find
and buy a suitable transformer for the power supply. I suspect that for
a few $$ more Gecko could build a driver that runs on 90V instead of 80V
and thus the users could utilize commonly available transformers rather
than be limited to custom, expensive transformers. The issue isn't
servo speed or power, but the fit of the driver to the rest of the
design.

Furthermore, some of us are using Geckos for FAST cnc systems in
production environments. For example, we've got a jig wherein the parts
are 20" apart. At 120 IPM, it will take 10 seconds every time we have to
traverse the table. Our servo system is rated at 300+ IPM. Motors
capable of driving such a system need all the power they can get ie 90V
systems.

Kim

On Sat, 2003-07-05 at 21:38, Tim Goldstein wrote:
> Lee is offering some very practical advise here. The subject about
> running at or above the maximum voltage comes up on this list about
> every 6 months and the answer is always the same. If you run close to
> the 80 V limit you run a great risk of blowing a drive when you
> decelerate and or when the line voltage surges. In all reality there is
> no need to push it to the limits of voltage. I am running Gecko G320
> drives on Bridgett (Bridgeport Series II) using 90 v motors with a power
> supply that is about 58 - 60 vdc. I get 120 ipm rapids on X and Y and 36
> ipm on Z without using the air assist (so I am lifting 1100 lbs on Z).
> Plenty of performance and not a single worry about blowing a drive.
>
> Tim
> [Denver, CO]
> Sherline products at Deep Discount & now Taig
> Mach1 & DeskCNC with credit card ordering
> www.KTMarketing.com/Sherline
>
>
> > -----Original Message-----
> >
> > When I first joined the group I was on this rant too, The design for
> > higher voltage is complicated and will at least double the costs of
> > these drives. Really take it from my experience, you really dont need
> > to run those motors to the max @90v. Try hooking it up to a car
> > battery and see how much torque just at 12volts. I serioulsy doubt
> > you'll ever need the top end speed at 90v under real-life
> > conditions. -Lee
> >
> > Check out for my previous msg:
> > http://www.electrical-contractor.net/ubb/Forum15/HTML/000058.html
>
>
>
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