Ron,
Ethernet from your PC to the 7i92H which has two 26 pin headers. Ribbon
cable from that to 25pin DB-25. Male or Female depending on your Break Out
Board. Mine plugs into the PMDX-126 and a far east Cheap BoB because the
PMDX126 doesn't bring out all the outputs on the second port.
If the picture makes it through the 7i92H is sitting on the bottom of the
cabinet at the left and a ribbon cable up to the PMDX126. Or I plugged in
the parallel port cable sitting loose on the right.
It's that easy.
John
-----Original Message-----
From: R C [mailto:[email protected]]
Sent: June-13-21 6:55 PM
To: [email protected]
Subject: Re: [Emc-users] all the MESA cards talk made me think
Hi Ralph,
well th ebreakout, BOB, has these buffered ports..� and it sounds like
I'd still need a parallel port?� The configuration, bitfile,� would that
be a linuxcnc thing?
(as I mentioned� previous;y,� I wouldn't mind� leaving parallel PCI
cards behind, and use something ethernet (if those are regular ethernet
cards?)
thanks,
Ron
On 6/13/21 7:19 PM, Ralph Stirling wrote:
A 7i92 could run twelve steppers full speed. You load the logic
configuration you want ("bitfile") for your application. It could have
the same pinout as your parallel port to plug right into your existing
breakout, but run your steppers much smoother and faster.
-- Ralph
On Jun 13, 2021 6:13 PM, R C <[email protected]> wrote:
CAUTION: This email originated from outside the Walla Walla University
email system.
I just looked up what a PMDX132 is, part of my problem is that the
parallel PCI card I used appears to be broken, and of course they are
harder to get. So I wouldn't mind switching to an ethernet based
controller in the PC side (Dell T5500/T7500).
I have seen the 7i92 mentioned, and others, can they do multiple
stepper motors? (right now I am using a parallel BOB, that
connects to steopper drivers (ala DM542), which drive the actual
steppers.)
thanks,
Ron
On 6/13/21 7:03 PM, Gerrit Visser wrote:
I choose a 7i92 to connect my PC with a PMDX132 to run PathPilot
(which has LinuxCNC inside). Depending on your BOB it might
be plug-play with pre-build .bit files to configure the Mesa card.
My reason for going with ethernet version was to reduce electrical
grounding issues. Had too many of those in the past with
direct connected stuff. It also expands the choice of PC to run LinuxCNC
on, doesn't need a pci or pcie slot this way.
Gerrit
-----Original Message-----
From: R C <[email protected]>
Sent: June 13, 2021 8:43 PM
To: linuxcnc-users-list <[email protected]>
Subject: [Emc-users] all the MESA cards talk made me think
Hello,
I have a 'desktop' mill and lathe (both Sherline), and I am using a
parallel BOB and printer ports to run them. Of course one of
them just gave up (PCI printer card), I do have a spare but they are
harder to come by, besides, the setup is not really ideal?
What would be the best way to replace the BOB-LPT stuff? (these
things are desktop CNC machines, I am playing/learning for
fun, I am not trying to reliably machine F22 raptor jet engine parts, I
am mostly turning stock into scrap).
I see some cards that are in the $50 etc range, and there are the
ones that use ether/cat5 connections (are 'regular' ethernet
cards used with
those?)
I am looking at a lathe that has 2 steppers, and it has a quadrature
encoder, the mill has 3 steppers, and planning on adding a
quadrature encoder).
thanks,
Ron
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