On Thu, 6 Dec 2007, Mark Jackson wrote:
> Date: Thu, 6 Dec 2007 13:43:53 -0800 (PST)
> From: Mark Jackson <[EMAIL PROTECTED]>
> Reply-To: "Enhanced Machine Controller (EMC)"
> <[email protected]>
> To: "Enhanced Machine Controller (EMC)" <[email protected]>
> Subject: Re: [Emc-users] How to configure pins in Parallel Port?
>
> 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
>
Try putting a (10K or so) pullup resistor from 5V to Pin 13. That should fix
your problem.
Peter Wallace
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