Re: Servo driven router table

Dancam v2.72 documentation states that on a pentium 733mhz it will produce 106700 step pulses per second.

So using the math answers you have got in the replies set your step rate multiplier accordingly.

Regards
Bob Thomas

ps Dancad3d etc 2.7 Beta version available for beta testing from www.dancad3d.com

--- In CAD_CAM_EDM_DRO@y..., "echnidna" <echnidna@y...> wrote:
> Dancam v26 documentation says it will produce 3240 pulses per second from a 10mHz 286 computer. version 2.7 (beta) will reportedly give higher pulse output on faster computer but no indication of how much
>
> Regards
> Bob Thomas
>
> --- In CAD_CAM_EDM_DRO@y..., Jon Elson <elson@p...> wrote:
> >
> >
> > omikse2000 wrote:
> >
> > >I have 90vdc pm servo rated at 6000rpm with no load.
> > >I am using a US DIGITAL E2-1024 encoder and a GECKO 320 con-
> > >troller . My power supply is 46 vdc. I am using Dancam runing
> > >from a 486dx-66 computer. I amtrying to get at least 2000 rpm
> > >with no load. The max I can get is 1233rpm. Fiddled with pulse rate
> > >multiplier and pwf ,but can't improve speed. Any ideas as it really
> > >moves when hooked direct to the power source?
> > >
> > Well, with the motor directly hooked to the 46 V power source, you'd get
> > 3000 RPM.
> > For 2000 RPM, you'd get 1024 pulses from the encoder (assuming this is
> > really a
> > 256 cycle/rev encoder) x 2000/60 = 34133 counts/second. Can your
> > computer generate
> > 34,133 step pulses per second? If that is really a 1024 cycle/rev
> > encoder, then you'd
> > need 136533 steps/second! What modulation percentage can the Gecko
> > 320go to?
> > Probably not 100 %. The 1233 RPM (no load) is 20.55% of rated, so it is
> > equivalent
> > of .2055*90 = 18.495 V on the armature. That sounds pretty bad. Maybe
> > you need
> > more gain in the Gecko, or more pulses/second out of the computer.
> >
> > Jon