Re: Parport schematic...?

[Ray Henry <rehenry-at-up.net>]

Hi Pat

Nice diagram and nice writeup.  There are three real differences between this 
(taken from master5) and a typical stepper EMC.  With the EMC Pin 11 is probe 
and it is labeled as home.  Pin 10 is used as e-stop on the diagram and it is 
a spare in the EMC stepper setup.  Pins 1, 14, 16, 17 don't do spindle, 
flood, mist, and enable.  These are funtions that Art has written into 
master5 in place of motors five and six.  

It would be possible to write a version of steppermod or freqmod that would 
do something like this but it is not in there now.

There is also one thing that I would not do and that is wire all of the home 
switches in series.  I'd wire them in parallel and set the home switch 
polarity for that.  This is just one of my quirks.

Ray 



On Sunday 04 May 2003 07:34 pm, you wrote:
> Hi all,
>
> Sorry to repeat this question, but it seems as though it might have
> gotten
> lost in the NAMES shuffle...!
>
> I've come across a really nice CNC tutorial that I don't recall seeing
> any mention of on the list or in the faq, so I thought I'd post a link
> here.
>
>  http://www.discountcampus.com/store/tutorframe.htm
>
> Most importantly, it has a really nice schematic of a parallel port
> interface that includes 4 axes and ganged limit / home switches.  Maybe
> somebody could take a look and comment on the usefulness of this circuit
>
> to EMC?
>
> thanks,
> Pat