Re: [Emc-users] all the MESA cards talk made me think

R C Sun, 13 Jun 2021 19:22:56 -0700

Hi John,


On 6/13/21 8:03 PM, John Dammeyer wrote:

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.


So let's see if I get it.

On the PC side an ethernet card is used, that connects to thatbreakoutboard, your PMDX-126, that in turn connects to the MESA board,7i92H, with a 25 pin db25, and the mesa card runs the stepper drivers, am I on track here?


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.

yes picture made it through. It looks easy enough, I just never used MESA cards, but it looks like that is a better options. I can ut the cards in the enclosure, and the just run a cat5/6 to it, which is a loteasier.


It's that easy.

John


thanks,


Ron

-----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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Re: [Emc-users] all the MESA cards talk made me think

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