RE: [CAD_CAM_EDM_DRO] Re: Digispeed PWM motor controller

In case Peter is already "off", and unable to respond in a timely manner, I
will take this one.

You've got 2 different "Controlling" actions happening-1) the Digispeed(or
the existing pot) supplies a low-voltage DC to tell the motor speed
controller how fast you want the motor to go-2) and then the motor speed
controller does whatever it needs to do to make the motor go that fast.

As long as your motor speed controller accepts a low-voltage DC CONTROL
voltage, it doesn't matter what MOTOR voltage(or current) the speed
controller is controlling.

Andy Wander
Verrex Corporation


-----Original Message-----
From: snagglexr650 [mailto:snaggletto@...]
Sent: Friday, April 23, 2004 7:26 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: Digispeed PWM motor controller

Hello,
Thanks for the response. I'm very interested in the Digispeed.

What determines the maximum sized motor I can run? As I understand
it, the Digispeed simply replaces the manual control knob function of
an existing PWM speed control allowing computer control.

Whether I'm running a 12V 2A motor or a 120V 18A motor, and a
properly sized PWM speed control for each, does the the Digispeed
even care what current is drawn at what voltage? Help me out here,
I'm just not quite sure how the Digispeed works with different sized
motors/speed controls. Thanks.

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

> Hello,
>
> That would be Peter Homann, and the site is at:
>
> http://www.homanndesigns.com/
>
> FWIW, Peter is a world class cyclist, (and multiple world record
> holder!) who is currently training for the Australian National
> Championships which take place next week. Next up, Athens...
>
> Just a heads up, since communication may be affected. I worked with
> him on the Digispeed project, and it's a very nice solution, IMO.
>
> Ballendo
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "snagglexr650"
> <snaggletto@c...> wrote:
> > Hello,
> > A while back somebody posted a link to a "Digispeed" PWM DC
> motor
> > speed controller that will take signals from Mach2 etc. The link
> has
> > since gone down. Any word on what happened to him and his

product?

> >
> > Are there any popular alternatives for software controlled DC
> motor
> > speed controls? I'm looking at some DC treadmill motors to be

used

> > as a programmable cnc spindle motor. Thanks.

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