Actually I do have it on a 5V breakout board but it is still putting out 2.44
volts on pin 13.
Someone gave me a tip that worked. I just inserted a 4.7 pullup resistor and
now things are running smooth.
Thanks for the input.
-MJ
Ray Henry <[EMAIL PROTECTED]> wrote:
Hi Mark
I suspect that this is a 3 volt parport. One recommended procedure is
to use a powered breakout board. You could also use a PCI parport card
that produces a 5 volt signal.
Rayh
On Thu, 2007-12-06 at 13:43 -0800, Mark Jackson wrote:
> Thanks for the link.
>
> Yeah that's right. Pin 13 is input. It is used for the z limit
> switch.
>
> For some reason the pin is showing 2.44 volts.
>
> The controller needs to see 5 volts to tell it things are a go.
>
> At 2.44 volts the z motor won't do anything.
>
> I have tried momentarily giving it a 5 volt charge and then it works
> until the limit switch is closed.
>
> I could just remove the limit switch. But it still needs to have that
> 5V initially.
>
> I was thinking there might be a way to make pin 13 an output pin.
>
> 'Not sure what to do here.
>
> -MJ
>
>
>
>
>
> Jeff Epler wrote:
> You can make an output pin HIGH all the time by using "setp"
> in your hal
> file:
> setp parport.0.pin-MM-out 1
> ^^ replace MM with the pin number
>
> However, parport pin 13 is an input to the PC, not an output
> (see
>
> http://linuxcnc.org/docs/2.2/html/hal_drivers.html#fig:Parport-block-diag) EMC
> cannot set this pin to HIGH or LOW.
>
> Jeff
>
>
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