RE: [CAD_CAM_EDM_DRO] Repost: Successful Gecko G320 servo applica tions

Bob,

I am using a set of the G320 on my Shoptask. It is running at 24 volts
driving one of the Camtronics servo motors on one axis and some NEMA 34 size
units I got on E-bay on the other 2 axis's. This replaced a stepper setup
that was using 550 in/oz bipolar steppers. It works GREAT! I have the axis
with the Camtronics motor connected at 3:1 ratio and the other 2 at 2:1
ratio. I don't think I need the 3:1 ratio to get the required torque but
wanted to get the greater resolution the higher ratio gives me. The machine
is using 5 tpi ball screws.

I am getting 135 ipm on the axis with the 3:1 ratio and have gave up seeing
how fast the 2:1 ratio axis will go when I got 180 ipm. The limiting factor
is the maximum motor RPM at the voltage being run. The G320 would run the
3:1 axis faster if the motor was capable of running at a higher rpm. If I
up the supply voltage then I can get the motor to go faster. I know Dan runs
these motors on a 36 V supply.

If you can find a servo motor that supplies the torque you want and has a
maximum RPM rating that gives the speed you want all within the 80 V and 20
amp rating of the G320 it will work out just fine.

Tim
[Denver, CO]

> Hi,
> I'm trying to figure empirically and theoretically if
> servos
> will work in my application and I don't have any
> experience
> with servos other than owning a machine w/working servos.
> I was wondering if someone has applied servos with Gecko
> G320 or G340 drives, in what application and what were
> the
> results? Speeds obtained, max. and while milling. What
> motors were used? What was the pitch of the ball screws?
> I'm trying to drive the X+Y axes on a 3 HP mill w/5 tpi
> lead ball screws w/no backlash, ball bearing ways, it was
> originally driven by 400 in. oz. unipolar steppers at 10
> in./min.
>
> Thank you Bob
>
> FAQ: http://www.ktmarketing.com/faq.html