RE: [CAD_CAM_EDM_DRO] Re: Advertisement Announcement - DigiSpeed Spindle Speed Controller for Mach2, TurboCNC, etc

Hi Fred,

What is the frequency of the PWM signal comming out of the DeskCNC. I'm
guessing it is higher than 50Hz.

We have a couple of options. I can add in a DeskCNC mode, or have a special
Desk CNC version. either way it should just be a software change.

On point to note is that the PWM signal accepted by the DigiSpeed is logic
low. That is, 5V is off, 0V is full speed. The closer the duty cycle is to 0
the faster the speed.

The reason being is that the DigiSpeed has pull-up resistors on the inputs,
like most breakout boards. If the printer cable is not connected, the PWM
input will be pulled to 5V, turning the motor off.

Fred, email me offline and we'll sort something out.

Cheers,


Peter Homann
mailto:Peter.Homann@...
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: Fred Smith [mailto:imserv@...]
> Sent: Friday, 2 April 2004 9:26 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: Advertisement Announcement - DigiSpeed
> Spindle Speed Controller for Mach2, TurboCNC, etc
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Peter Homann"
> <peter.homann@a...> wrote:
> > Hi,
> >
> > I have now completed the development and testing of the DigiSpeed
> DC motor
> > speed controller. Its purpose is to allow spindle speed control
> from CNC
> > software, Primarily Mach1/2, TurboCNC and other software.
>
> The DeskCNC controller board has a 0-5 volt PWM onboard. Will this
> work with your speed adjusting interface?
>
> Fred Smith - IMService
>
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