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  • unknown
  • unknown
18 Jul 2025 17:28

Using a 7i92t as replacement for a parallel port

Category: Driver Boards

Thanks for elaborating, a lot of those that visit very rarely document their experience. This is very useful and many thanks for your time .
  • unknown
  • unknown
18 Jul 2025 17:26

We need to purge raspi-firmware packages in LinuxCNC ISO (AMD64 version)

Category: Installing LinuxCNC

The issue is the installer itself, the image uses the standard Debian installer, which for some reason installs the RPi stuff. So it's not as simple as removing the package, this has been an on going issue for the last couple of releases.
I thought I should explain a little more regarding the AI thing. At a certain time of day the forum gets bombarded by users creating spam accounts and a lot of the time it is AI generated, so anything that appears that way I become somewhat suspicious of. And also being of "arrogant English heritage" I assume everyone speaks English, tho being from Australia what we speak is far removed from the Queen's English. So I offer my apologies for my reaction to your opening post.
Regards
Rob

Actually after hearing about some of Debian's recent "woke actions" and now wanting funding from the above mentioned AI techbros I wondering if an alternate distro would be better. I know they claim it's "just to help Devs" one done wonder.
Another apology for going off topic.
  • unknown
  • unknown
18 Jul 2025 17:13
Replied by unknown on topic Raspberry CM5 compatibilty

Raspberry CM5 compatibilty

Category: Computers and Hardware

There is a Linuxcnc image for the RPi. There is nothing special about the image, it is just Debian Bookworm with the Linuxcnc packages installed and a realtime kernel built from the Raspberry Pi official GitHub sources with the RT-Preempt enabled, no non RPi patches are added.
I can confirm booting from SD card, USB and Nvme all work.
For touchscreen I would be more inclined to use one with a USB interface that enumerates as HID, it is far easier to setup and basically "just works". This has been confirmed with a generic touchscreen bought from AliExpress, 10.1" in this case.
For a small form factor, x86/64 is the best bang for buck, I would suggest looking into the Odroid H series, I have been using an Odroid H3 since its release and it has not let me down.
Even a 3rd gen I5 is a better solution than the RPi 4 or 5. The only advantage is the small form factor and being able to connect to a Mesa SPI board. Compared to an ex corporate PC it is quite an expensive option.
The above opinion comes from use of the RPi-400, RPi5 with an Nvme drive and use of an Lenovo ThinkCentre with an i5 I found by the side of the road that someone was throwing away.
  • G0G53Z148
  • G0G53Z148's Avatar
18 Jul 2025 17:06 - 18 Jul 2025 17:07
Replied by G0G53Z148 on topic Mesa Auswahl für größeres Projekt

Mesa Auswahl für größeres Projekt

Category: Deutsch

Hallo @tommylight
selbst auf die gefahr hin dich zu nerven
was sagst du zu der kombi

7i92TH
7i76U da ran eine 
7i83 für die Servos 
das wären
5 x Takt Richtung für Servos
1 x Encoder
1 x 0-10V für Poti
32 Ein und 16 Ausgänge
und ein Rs422 - Rs485 für eine 7i83
für 6 -10 bis +10V servos bzw 0-10V servos
mit 6 x Encoder

Das wäre Flexibel durch 3 Karten vom Budget her  nur 10€ Teurer als eine 7i76EU + 7i83
Ein Firmware habe ich auch gesehen 7i92t_7i76x1pd.bin
Da die 7i83 Ja dann wie du sagtest über den Smart Serial gesteuert wird sollte das eigentlich funktionieren:)

Danke für deine hilfe und schöne grüße aus österreicht
  • JT
  • JT's Avatar
18 Jul 2025 17:02
Replied by JT on topic Flex Gui preset buttons

Flex Gui preset buttons

Category: Other User Interfaces

I just added precision to all status labels that return a single float.

JT
  • besriworld
  • besriworld
18 Jul 2025 16:59

Limit 3 asymmetric acceleration and deceleration ?

Category: General LinuxCNC Questions

I searched the forum but couldn’t find a working solution. I want to set different acceleration and deceleration values for my spindle. I’m wondering if this functionality could be added to the
limit3
component?
  • Franklin
  • Franklin
18 Jul 2025 16:51
Replied by Franklin on topic WHB02 remote control to QtPlasmac

WHB02 remote control to QtPlasmac

Category: Plasmac

Hi, the remote was bought a long time ago, but I just took it out of the box and decided to connect it to my machine.
The lsusb command finds Device 031: ID 10ce:eb6f Silicon Labs
and I don't know what to do next?
  • JT
  • JT's Avatar
18 Jul 2025 16:32
Replied by JT on topic Flex Gui preset buttons

Flex Gui preset buttons

Category: Other User Interfaces

I'll have to add float type status labels to a different dictionary to be able to set the precision.

A display delay is usually the CPU is maxed out and the display is always second to real time.

JT
  • tommylight
  • tommylight's Avatar
18 Jul 2025 16:27
Replied by tommylight on topic Raspberry CM5 compatibilty

Raspberry CM5 compatibilty

Category: Computers and Hardware

Moved to "computer and hardware".
  • snowgoer540
  • snowgoer540's Avatar
18 Jul 2025 16:08
Replied by snowgoer540 on topic XHC-WHB04B-6 pendant hal configuration

XHC-WHB04B-6 pendant hal configuration

Category: Plasmac

Glad to help, happy cutting.
  • Cerezas
  • Cerezas
18 Jul 2025 15:08 - 18 Jul 2025 19:30

Using a 7i92t as replacement for a parallel port

Category: Driver Boards

As a recap and for reference:

0. Yes, the 7i92t can replace a parallel port, with the advantages of more functionality, more reliability and that it offloads critical processing from the computer's CPU. One caveat for my particular use case: the card needs an external stable 5V supply. 

1. In my case, I was connecting a lathe that has a DB25 connector and I needed the following signals: ESTOP (pin 1), XDIR (pin 2), XSTEP (pin 3, inverted), ZDIR (pin 4), ZSTEP (pin 5, inverted) and SPINDLE ON/OFF (pin 16). The following is the correspondence between the DB25 pins and IO Pins in the Mesa card:

DB25 => 7i92t
01   => IO Pin 000 
02   => IO Pin 002 
03   => IO Pin 004 
04   => IO Pin 006 
05   => IO Pin 008 
16   => IO Pin 005 

IMPORTANT: in computer parallel ports, pins 18 to 25 are GND pins. Jumpers W1 and W2 on the card must be set as pull-downs to GND by putting them in the down position. 

2. A firmware needs to be selected that matches the requirements. For that, you need to download the support files for the card from mesa. I got mine from: www.mesanet.com/software/parallel/7i92t.zip. After unzipping the file, navigate to the hostmot2 directory. After inspecting the format of the .pin files, I used the grep utility to find the files that matched the step generator pinout I needed, like this:

grep -il " 3.*4.*stepgen.*step" $(grep -il " 2.*2.*stepgen.*dir" *pin)

That grep is not perfect, I checked the 3 files manually and the firmware that was the best fit for my pinout was the 7i92t_benezanx2d.bin (the one that corresponds to the .pin file)

I uploaded the firmware to the board using the mesaflash utility.

3. I ran the pncconf utility and created a new configuration. For the card discovery utility to be available, "Show Advanced Option Pages" in the "Start" page needs to be enabled. That utility reads the pinout from the firmware when you get to the "Mesa Card 0" page.

The machine is running well, I made mistakes like disabling the "Include spindle" setting on the "Base Information" page, that's why the spindle was not turning. For the motor setup I only needed to change the scale, which was simply the number of steps per mm. I also changed maximum speed and acceleration, and the hold times according to the configuration I had from when I used the parallel port.
 
  • jmelson
  • jmelson
18 Jul 2025 14:35

looking for advice on retrofitting hydrolic mill

Category: Driver Boards

Well, one motor driving multiple axes sounds like it has to have clutches. To use modern controls, you need to drive EACH axis with a dedicated motor. It will make a MUCH more versatile machine.
Jon
  • PCW
  • PCW's Avatar
18 Jul 2025 14:25
Replied by PCW on topic Common

Common

Category: Driver Boards

Hallo
Ich habe eine Frage Mesa 7i96s was muss ich an Input Common Anschliesen GND oder 24 Volt wenn ich  NPN Endschalter verwende.

Hilton

 

+24V
  • PCW
  • PCW's Avatar
18 Jul 2025 14:23
Replied by PCW on topic Raspberry CM5 compatibilty

Raspberry CM5 compatibilty

Category: Computers and Hardware

Note that those are all Linux questions, not LinuxCNC questions
so perhaps better asked in a general Linux forum.
  • PCW
  • PCW's Avatar
18 Jul 2025 14:15

homing with Phase Z encoder on MESA 7i96s

Category: Advanced Configuration

is this a static error? ( error when not in motion )

If so and you already have as much P term as you can set  while
remaining stable, you can add some I term to eliminate the static error.

If it's a dynamic error ( error when in motion ) I would have to have a
halscope plot of the error to see whats going on.
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