Re: Servo survey.

Tim:

I planned on direct drive mainly for simplicity. I was hoping I had
servos that would power the screws adequately without reduction. I
have limited manufacturing capability, so simplicity has value.

Thanks for your input.

Ron

--- In CAD_CAM_EDM_DRO@egroups.com, "Tim Goldstein" <timg@k...> wrote:
> I am using one of Dan's servo motors and it is working great. I
would
> suggest that a 1:1 drive ratio will not be successful unless you
are driving
> something small like a Sherline. I have it on a Shoptask 3 in 1
running at
> 3:1 reduction. I know Dan has them on a drill mill machine running
2:1. The
> 3:1 ratio with a 5 tpi screw limits your top speed to about 140 ipm
at 24 v.
> I know Dan was getting 180 ipm moves on his mill drill at 36 V.
>
> Why do you want to direct drive the screws??
>
> Tim
> [Denver, CO]
>
> > The servos are ones being sold by Dan (Camtronics). They are
Clifton
> > Precision C23-L55-W30 series. Published specs are: peak torque =
430
> > oz.in., continuous torque = 50 oz.in., terminal resistance = 3.8
> > ohms, peak current = 20 amp.
> >
> > They're advertised as 24V, however the data sheet shows them as
36V.
> >
> > I'm planning a 5/.2 ball screw and 1:1 drive.
> >
> > I was initially attracted to them because of the low cost and
> > advertised high torque. However, not being well versed in the
load
> > profile for servos, I am now concerned seeing the torque curve max
> > out at 200 oz.in.
> >
> > Any and all input is appreciated.
> >
> > Ron
>
> > FAQ: http://www.ktmarketing.com/faq.html