Re: [CAD_CAM_EDM_DRO] Re: Stepper motors only turning one directi on

Never thought of that one but I see what you mean.
Jim

----- Original Message -----
From: "Alan Marconett" <KM6VV@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, June 07, 2004 1:44 PM
Subject: Re: [CAD_CAM_EDM_DRO] Re: Stepper motors only turning one directi
on


> Hi Andy,
>
> Actually, it can happen. If the 5V is missing, the module will draw a
> little power from the direction line when it is high. So, the stepper
> will drive in THAT direction, but not the other! (Guess how I found out
> THAT one).
>
> Alan KM6VV
>
> Andy Wander wrote:
>
> > If the step signal is getting through, and the motor is moving, I don't
> > think it can be a problem with the 5V line.
> >
> > Andy Wander
> > Verrex Corporation
> >
> >
> > -----Original Message-----
> > From: coldfusionracingproducts [mailto:gokarts164@...]
> > Sent: Monday, June 07, 2004 10:36 AM
> > To: CAD_CAM_EDM_DRO@yahoogroups.com
> > Subject: [CAD_CAM_EDM_DRO] Re: Stepper motors only turning one
> > direction
> >
> > Dan, your correct about the 5v line.
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Dan Mauch" <dmauch@s...>
> > wrote:
> >
> >>If that older drive is like the Gecko then do you have the +5
> >
> > connected from
> >
> >>the PC to the driver?
> >>dan
> >>----- Original Message -----
> >>From: "Peter Homann" <peter.homann@a...>
> >>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> >>Sent: Monday, June 07, 2004 1:24 AM
> >>Subject: RE: [CAD_CAM_EDM_DRO] Stepper motors only turning one
> >
> > direction
> >
> >>
> >>>I'm guessing, but, it sounds like the direction signal is not
> >
> > getting
> >
> >>>through to the drive circuitry.
> >>>
> >>>Since you have tested that the dir voltage is changing with
> >
> > direction,
> >
> >>>ensure that it is getting to the Centent drive. If the dir goes
> >
> > through an
> >
> >>>opto-isolator or buffer. check that the dir voltages is getting
> >
> > past that.
> >
> >>>Cheers,
> >>>
> >>>
> >>>Peter Homann
> >>>mailto:Peter.Homann@a...
> >>>Adacel Technologies Limited,
> >>>250 Bay St, BRIGHTON, 3186, AUSTRALIA
> >>>http://www.adacel.com <http://www.adacel.com>
> >>>Telephone +61 (3) 8530 7777, Facsimile +61 (3) 9596 2960
> >>>Mobile 0421-601 665
> >>>
> >>>
> >>>
> >>>>-----Original Message-----
> >>>>From: coldfusionracingproducts [mailto:gokarts164@h...]
> >>>>Sent: Monday, 7 June 2004 1:17 PM
> >>>>To: CAD_CAM_EDM_DRO@yahoogroups.com
> >>>>Subject: [CAD_CAM_EDM_DRO] Stepper motors only turning one
> >
> > direction
> >
> >>>>
> >>>>Here is my setup:
> >>>>
> >>>>Centent Cn0143 Microstepping drives (older geckos)
> >>>>680oz Camtronics Steppers
> >>>>24v power supply
> >>>>PC with Mach2
> >>>>
> >>>>My motors are only turning in one direction. The distance
> >
> > traveled
> >
> >>>>is perfect though. When I jog 1 inch left then 1 inch right, it
> >>>>makes it 2 inches right...
> >>>>
> >>>>I measured the signals coming out of the Parallel Port and I am
> >>>>getting changes in the direction voltage.
> >>>>
> >>>>Any advice?
> >>>>
>
>
>
>
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