25Khz glitch ? (was Re: Ideas for matching drives on a YY axis design?

Hi Dave, that was with cncpro running on a 1gHz laptop. The maximum
speed setting I can get is 386.265 ipm. This results in a step
frequency of 64.9kHz mesured on a meter.

Somthing odd though. Maybe someone can clear this up for me as I havnt
had time to look into it.
I am using this setup:
360 line encoders resulting in 1440 ppr, 2:1 belt reduction to get
2880 ppr, and a 10 tpi leadscrew so that is 28800 pulses per inch. So
my 64.9kHz step frequency should get me about 135 ipm which it is. So
why does CNCpro tell me I am moving at 386.265 ipm?

--- In CAD_CAM_EDM_DRO@y..., "turbulatordude" <davemucha@j...> wrote:
> Hi Dean,
>
> what software ??
>
> Dave
>
> --- In CAD_CAM_EDM_DRO@y..., "deanc500" <deanc@v...> wrote:
> > I have a machine with dual y motors and matching them didnt seem to be
> > an issue. I just kept the tuning pots at approx the same place by eye
> > and it works great. I dont think the tuning is that critical. In other
> > words, close is good enough.
> >
> > Just a sidenote for those having trouble tuning G320's: My main
> > problem was trying to get good rapid speeds out of the machine. My
> > G320 drives would fault randomly at frequencies over about 25Khz. I
> > need 40Khz+ to get 100 ipm travel speed. I finally booted the machine
> > into "safe mode command prompt only" (yes dos safe mode doesnt load
> > himem.sys or anything)and now I can reliably get 60Khz out of it. At
> > those frequencies, it only takes a 2.1 ms glitch to fault the drives.
> > Dean
> >
> >
> > --- In CAD_CAM_EDM_DRO@y..., "caudlet" <tom@t...> wrote:
> > > Group:
> > >
> > > Here is the basic design. Moving gantry table 72" X 80" (outside)
> > > with twin ballscrew servo drives on the YY axis. Just got my Gecko
> > > 340's in yesterday and in reading the tuning instructions I started
> > > to think about ways to "balance" the two YY drives. The servos
have
> > > 500 count encoder as well as tach feedback.
> > >
> > > What is the best way to setup the twin screws so they have the same
> > > characteristics? I have lots of test equipment (300Mhz Tek Scope,
> > > power supplies, scope current probe, function generator, etc). For
> > > those of you that have used and setup the Gecko's feel free to
throw
> > > in your 2 cents!