Re: Breakout board or cards

i think there is a step to voltage circuit here, in files section..

http://groups.yahoo.com/group/mach1mach2cnc/

Wally



--- In CAD_CAM_EDM_DRO@yahoogroups.com, Joe Macmurchie <jrmac@s...>
wrote:

> Jeff,
>
> Thanks to you and the others for the help on this. I kinda had an

idea it

> was a safety device... But it still begs the question to me how it

ever got

> the name "charge pump". I am sure it made sense at the time.
>
> BTW folks, still need to hear from someone who has a simple home

brew

> spindle speed PW to voltage circuit.
>
> Guess I will just have to drag out some resitors, a capacitor or

two and my

> trusty voltmeter. My VFD supplies the 10 volts already all I need

to do is

> smooth out the PWM to a variable voltage somehow. Nuts on speed

control

> would be lost on me at this point in my "development". <Grin>
>
> -Joemac
>
>
> > The chargepump circuit is generally used with the MACH2 CNC
> > software. When MACH2 is activated, it outputs a unique
> > frequency which is detected by this circuit. The circuit
> > then activates one of the output pins. This makes sure that
> > the tool is not able to move unless MACH2 is activated and in

control.

> >
> > Jeff