On Sunday 01 November 2020 11:00:23 dave engvall wrote:

> Hi,
> I have a application for a 7i37/ 7i33. In face a couple of them.
> First try has been a D525 with a SIIG single pport.
> First off I have no idea if the SIIG board works and indeed no idea of
> how to test it.
>
> With Jon's ppmc there was a comm program that told one right away if
> the link was working.
> I have no idea how to do anything like that with the 7i37.
> Sorry to be so ignorant but that's life.
>
> Can someone recommend a small motherboard (if possible) that has a
> reliable EPP pport?
> The app is servos which may relax some of the constraints.

Dave, I ran the D525MW mobo on my little mill, using the D252MW's existing 
parport with a now disco'ed cnc4pc G1G breakout interface board. both on TLM 
and the micro-mill. Both are now running on a 5i25, but TLM is still on the 
same old interface plus a 2nd bob because I've added more goodies but the 
mico-mills box is now running a 4 axis 6040 gantry mill with a 7i76D to get 
enough I/O for independent home switches and other gingerbread such as the 
mister pump.

However, looking up those boards, none of the variations are intended to be 
driveb by a parport.  You need a pci card that drives those 50 pin cards.  And 
the 5i25 isn't it. Looks like you need at least a 5i20/22/23
card in your computer. The 5i23 gives you more than enough I/O to do anything 
you want on that mill, 96 I/O lines on it.  The 7i43 also looks usable with a 
parport and 50 pin daughter cards. But the level of data traffic it pushes thru 
a parport might find some parports wanting.

> In conclusion how does one test the link?

I don't know how well it works, never built it, but the linuxcnc documentation 
pdf has instructions for making and useing it.

> Once the link works the rest should be easy.
> Note: I've used 5i20/7i33 combo's.

And if thats enough i/o, it should still Just Work.  Famous last words of 
course...

> Thanks in advance
>
> Dave
>
>
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Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>

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