Re: Question on weird output from parallel brea kout board pin #16?

Andy:

I figured that might be the case, but also though that that is more
or less what a pulsed signal is anyway and it "should" work.

Jeff

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Andy Wander <awander@v...>
wrote:

> Jeff:
>
> Sounds like Axxus is saying that those pins are just ON or OFF(OVor

5V) to

> me.
>
> Andy Wander
> Verrex Corporation
>
> -----Original Message-----
> From: washcomp [mailto:jeff@w...]
> Sent: Wednesday, February 02, 2005 7:39 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Question on weird output from

parallel

> breakout board pin #16?
>
>
>
> I am using an Axxus parallel port breakout board with MACH2 on my

CNC

> Bridgeport. I have just wired up a variable frequency drive. I am
> controlling the speed of the drive with a Homman designs Digispeed
> with a PWM signal from MACH2.
>
> I selected pin #16 on the breakout board and I seem to be getting a
> voltage on it, but no pulse. I changed it in the software config

to

> be a step signal and got the same. I then looked at the board's
> documentation and it says the following:
>
> "Pins 1 and 16 are 5V outputs and can be used to connect with TTL
> devices such as transistors, logic gates, or microprocessors."
>
> The Digispeed is supposed to work with an ACTIVE LOW pulse.
>
> I can always rewire a bunch of stuff and steal one of the pins
> normally used for a step signal, but I would have thougght that

this

> would have worked.
>
> This is where I'm getting a little hazy. I always thought that

step,

> PWM and other signals WERE 5V, so this should be OK. Am I confused?
>
>
> Thanks,
> Jeff
>
>
>
>
>
>
>
>
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