MESA 7I92 programming

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29 Oct 2025 20:39 #337408 by PCW
Replied by PCW on topic MESA 7I92 programming
You would need to specify which pins are:

step0/dir0 step1/dir1 etc encoder a,b,z PWM

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29 Oct 2025 21:07 #337412 by TJ
Replied by TJ on topic MESA 7I92 programming
1 port: IDC26 NORMAL LPT. PORT.
1 X DIR
2 X STEP
3 Y DIR
4 Y STEP
5 Z DIR
6 Z STEP
7 A DIR
8 A STEP
9 B DIR
14 B STEP
17 PWM


2 PORT: IDC BIDIRECTIONAL LPT. PORT.
11 Encoder A
12 Encoder B
13 Encoder Z
17 Charge Pump 10 KHz. max 16Khz.
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29 Oct 2025 22:02 #337415 by tommylight
Replied by tommylight on topic MESA 7I92 programming
1 whatever
2 X DIR
3 X STEP
4 Y DIR
5 Y STEP
6 Z DIR
7 Z STEP
8 A DIR
9 A STEP
14 B DIR
16 B STEP
17 PWM
Would have been much better as 4 axis would be standard pins.

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29 Oct 2025 23:05 #337421 by PCW
Replied by PCW on topic MESA 7I92 programming
This should be close assuming your pin numbers are DB25 parallel port numbers

 

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30 Oct 2025 07:03 #337443 by TJ
Replied by TJ on topic MESA 7I92 programming
20 years ago I tried Linux CNC once, but I gave up due to language barriers and the European purchase restrictions of the cards.
I have built quite a few CNC machines in the past 40 years in systems running under Win.
Today's language translation programs can be an incredible help.
Clone cards are now available at a reasonable price, so I thought I would try the Linux world again.
The helpfulness that the Linux forum provides is amazing.
A special shout out to PCW for his help and expertise that he shares.
I am an electrical engineer and I can create an electrical circuit diagram in minutes. My limitations when it comes to PC programming are huge. I have been trying Linux for 2 weeks. I still have a lot of questions. Today I will upload the unique configuration I received from PCW to the 7I92 card.

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30 Oct 2025 08:12 #337447 by unknown
Replied by unknown on topic MESA 7I92 programming
I'm civil/builder/construction labourer, using the page I linked to I was able to create Mesa bitfiles (then some custom ones for a clone board I made).

What it comes down to is being able to follow instructions.
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30 Oct 2025 19:12 #337510 by TJ
Replied by TJ on topic MESA 7I92 programming
Hi
I installed the received **.bit file on the card from the command line.
When I read it back from the card, everything is fine.
How can I insert the custom config into Pncconf?
 
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30 Oct 2025 19:34 #337514 by PCW
Replied by PCW on topic MESA 7I92 programming
The easiest way is to use pncconfs  "Discovery" option

You need to select "Show Advanced Option Pages"
on the first pncconf page for the discovery option
to be available.
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30 Oct 2025 22:18 #337545 by TJ
Replied by TJ on topic MESA 7I92 programming
Pncconf found the card, read the settings and they are displayed.
I chose a lathe X-Z axis for the test.
I configured the X-Z spindle PWM and the Charge pump encoder end positions etc...
It doesn't let me proceed, it says no axis or PWM is configured.
What did you do wrong?
A few pictures of the settings.
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30 Oct 2025 22:44 #337547 by tommylight
Replied by tommylight on topic MESA 7I92 programming
You have 1 active PWM generator but no pin out for it chosen, so either set the PWM number to 0 or select a pin for spindle PWM

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