Re: PWM for spindle speed

Thanks,

I am finalizing a opto-isolator input/interface board and realized
that since I am doing all this other stuff, why not add both the
charge pump and a pwm.

Since you have your charge pump on Pin #1, that suits me just fine.
makes it easier to layout the board too.

Dave

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Henrik Olsson"
<henrik-olsson@...> wrote:

>
> Hi Dave,
> You are probably thinking of the charge-pump signal. It will output

a steady

> 12.5kHz signal whenever Mach3 is running. If you're breakout board

supports

> it then use it, it's a good safety but is not mandatory for Mach3 to

run

> (although you're breakout board may need it) and it can be turned

off to

> free an extra output. (It's actually turned off by default, I beleive)
>
> Now when you mentioned it I seem to remember something about a

'weak' output

> or something but can't recall which pin it's supposed to be. Just

try one,

> I'm pretty sure you won't run in to any problems.
>
> /Henrik Olsson.
>
> For reference, here's my complete pinout which works nicely:
>
> Pin1 (Output) - ChargePump.
>
> Pin2 (Output) - X-Dir
>
> Pin3 (Output) - X-Step
>
> Pin4 (Output) - Y-Dir
>
> Pin5 (Output) - Y-Step
>
> Pin6 (Output) - Z-Dir
>
> Pin7 (Output) - Z-Step
>
> Pin8 (Output) - Auxillary Output 1 (Flood)
>
> Pin9 (Output) - Auxillary Output 2 (Mist)
>
> Pin10 (Input) - X, Y, Z - Home (Prox switches via diodes, active high)
>
> Pin11 (Input) - MPG Channel A
>
> Pin12 (Input) - MPG Channel B
>
> Pin13 (Input) - E-Stop (Ext E-stop pressed, active high)
>
> Pin14 (Output) - Spindle Speed Step.
>
> Pin15 (Input) - Available for future use. (Probe perhaps)
>
> Pin16 (Output) - Spindle Dir.
>
> Pin17 (Output) - Spindle On/Off. (Aux Output 3).
>
>
> ----- Original Message -----
> From: "turbulatordude" <dave_mucha@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Wednesday, November 01, 2006 9:09 PM
> Subject: [CAD_CAM_EDM_DRO] Re: PWM for spindle speed
>
>
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Henrik Olsson"
> > <henrik-olsson@> wrote:
> >>
> >> Hi Dave,
> >> Any of the outputs you've got left will do. I use step/dir for the
> > spindle
> >> and have the step pulse on pin 14 - works good and shouldn't make any
> >> difference with PWM.
> >>
> >> /Henrik Olsson.
> >
> > Thanks,
> >
> > I seem to remember that there was one pin with a pulse out to tell the
> > breakout board that the software was in control of the port. so, that
> > would be already used.
> >
> > And since 2 thru 9 are also used, that means there are only a few

left.

> >
> > and, I seem to recall some long time ago that there was on pin that
> > was somehow less than ideal for a pulse train.
> >
> > Dave
>