Re: Want to convert step-pulley drive to digital speed control

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Steve" <s_hight@y...> wrote:

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "caudlet" <thom@t...> wrote:
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Robert Campbell" <bob@c...>
> > wrote:
> > > Steve,
> > >
> > > A VFD (Variable Frequency drive) may work. Look at Automation
> Direct.
> > > WWW.automationDirect.com
> > >
> > > If a VFD will work, then using one of our spindle speed control
> > boards would
> > > give you control from your program.
> > >
> > > At least that would be a place to start looking.
> > >
> >
> >
> > AND the VFD will take the place of the static converter and give you
> > back full power on the motor as well as speed control. Feed it
> single
> > phase 230VAC 50/60HZ and like magic you get 3ph out at varying
> frequency.
>
> This is excellent! It looks like the model I need is the GS2.
> http://web5.automationdirect.com/adc/Shopping/Cata
> log/AC_Drives_-z-_Motors/GS2_(115_-z-_230_-z-_460_
> VAC_V-z-Hz_Control)/GS2-23P0
>
> At 325.00 it seems like a heck of a deal. I am going to order one.
>
> Thanks for the help!
>
> Steve

\
Just make sure the VFD can be controlled with an exernal analog
voltage. 0-10VDC is common and so is 0-5VDC. Then all you have to do
is interface it through one of the Campbell Cards with the motor speed
option card and you can "command" the spindle speed in MACH2.