Re: Repost: Successful Gecko G320 servo applica tions

Hi Tim

About the Camtronics servo motor, do we need special
pulleys,belt and mounting to fit Nema34 size on the ShopTask
(Eldorado). Do you have the drive spec.
I am about to duplicate what you did (ball screws,CNC,DRO) on a new SM
Eldorado when it arrives (is it SM2000 ?).

Thanks

--- In CAD_CAM_EDM_DRO@egroups.com, Tim Goldstein <timg@k...> wrote:
> 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