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I have tried searching but cannot seem to find what I'm  looking for. I am getting ready to convert my little 9x20 lathe to CNC and am trying to find out if lathe threading can be done with a single index pulse only.  Basically I would make an index plat with only one hole in it and use an optical sensor for the trigger. Is this possible in LinuxCNC, and could anyone point me to an example?

Thanks,
John Brannen

I don't see any analog-out pin linked in the HAL to pass the M68 E0 to carousel.0.pocket-number.
I suspect that nothing is driving pocket-number and so it always goes to zero.

One option might be to create complementary pins in your userspace module and link them in the HAL layer.

Can you give more details about what you are trying to do? There are a few examples of existing drivers with realtime and userspace pairs. These tend to communicate with private shared memory.

linuxcnc.org/docs/stable/html/man/man1/halsampler.1.html
linuxcnc.org/docs/stable/html/man/man9/sampler.9.html
For example.

Are there any updates on this? I am facing the same problem using Lcnc 2.9.4 and Gmoccapy 3.4.9. My touchscreen is recognized as eGalaxTouch. In Axis GUI and Gmoccapy with USB Mouse it works flawless. 

Does orienting the spindle motor work to orient the spindle? (If it's not an exact 1:1 drive ratio then it won't)

What does the motor orient to? Is there a programmable alignment offset?

You say you are running out of IO. Is this because you are using a parallel port?

I can't advise on your PCB design, but I think this looks like a nice idea.

I have occasionally thought that there should be a niche for a similar board, but with on-board stepper drivers (Trinamic or some other serially-controlled driver)
That would, of course, need a dedicated HAL driver, but those can be surprisingly straightforward.

Python can find the path to the running code with the __file__ system variable.
Depending on the code in question you might want to use sys.argv[0] instead.
In both cases you probably need to use the Python path manipulation functions to assemble the required path.

Hello,
I made a custom version of the MESA Electronics 7c81 FPGA Card that I thought some of you might find interesting. 
I've attached images of the progress I've made so far. 





I haven't ordered the PCB yet, as I wanted to ask first, if any of you guys on here can find anything wrong with it. As I'm a student with limit budget I'd like to be a little more reassured that I'm not missing anything.
I used the  7c81 Schematics  found in this forum post and the schematics of the official  RPi CM5 IO-Board  to create my own schematics.





I have a few questions I haven't found a good answer for and I'd be happy to recieve constructive criticism on any part of the design.

• The SPI0 Bus of the RPi (SDA0, SCL0) is shared by the Serial Flash for the FPGA and one of the MIPI DSI/CSI-2 FPC connectors. Will this cause conflicts?
• I wasn't able to avoid routing traces under the FPGA, will this be likely to cause problems or will I be able to get away with it?
• Is it a good idea to ground pour the top and bottom signal layers of the 4 layer stackup, if I'm already using the two inner layers as ground planes?

Thank you in advance!
Niklas
 

This may be a setting about climb and conventional milling. Is there a "both" checkbox? (There is in Fusion)

It might be worth raising this as an issue ( github.com/LinuxCNC/linuxcnc/issues ) though it is almost a standard for Z0 to be top of travel (Fusion 360 CAM assumes this, for example, it scatters G53 G0 Z0 around the generated G-code) and I think that the other guis also go to Z=0 if you press the quill-up button.

It may be safer all round to reconfigure your Z with 0 at the top. This means that in machine coordinates Z is always negative, but that doesn't matter, you rarely if ever work in machine coordinates)

It should be possible, I assume you have read:
linuxcnc.org/docs/stable/html/man/man9/hostmot2.9.html#BiSS ?

HalloDa ich keine Antwort zurück bekommen habe versuche es nochmal.Die Frage war was muss man alles Einstellen in der HAL und INI.Habe den Vorschlag von Talla83 in der HAL und INI eingetragen, aber da steht ja schon jede menge darinnen.Muss das Deaktiviert werden?Hänge die beiden File an, vielleicht kann es einer ansehen.
Gruß Hans

I have some TAMAGAWA encoders model TS5661N132. It is an encoder with RS-485 serial communication. The question is: can this type of encoder be decoded with Mesa cards that support SSI or BiSS? If I'm not mistaken, this encoder is a Biss encoder.

Hi Chris,

yes that worked and it loaded the screen, thanks.
 

It help a lot to know the right name !
The most interesting thread I found is forum.linuxcnc.org/10-advanced-configura...-kinematics?start=10

One of the video we can find on the web

So, scara robot are definitely just another kind of config already implemented.