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Yes, if you don't know the signal characteristics, 
an external SSR would be safest.

Though if it is a DC signal, you can measure the
current with a DVM (Start at high current range and work down)

No creo que pueda saber si necesita mas de 100mA lo tengo que conectar al gatillo que tenia la antorcha 

Hi,

I added support for the Mesa 7i95t to the pncconf wizard (private_data.py with changes attached) and it seems to work ok other than needing to rename the inm to inmux pins for the 7i95t.  However, the THCAD configuration screen doesn't appear even though I assign an encoder input to arc voltage.  I must be missing something in looking at the code but I don't find where self.d._arcvpin that is used to control the display of the THCAD screen is ever set to anything other than None.  I have QTPlasmaC selected as the gui. Any help is appreciated.

Solved:  Attached updated files with the THCAD tab working.  The pages.py and private_data.py go in /usr/lib/python3/dist-packages/pncconf and the pncconf.txt should be renamed to /usr/bin/pncconf.

That will likely work, but the diode in not needed unless you use a magnetic relay.

It also unnecessary for TORCH_ON as you could use one of the high isolation (OUT4,OUT5)
outputs of the 7I96S directly as long as the current required is not > 100 mA

 

Me podrias confirmar si es correcto? Gracias

I am going to install Linuxcnc on Orange Pi PC Plus. OPC send to FPGA controller
Speed and Axis coordinate in steps. FPGA controller has buffer for all parameters. According my calculations USB speed is enough to work in real time.

In general there is no real advantage to have the local rotary feedback
returned to LinuxCNC (and some electrical disadvantages) So a 7I95T
would have sufficient Encoder channels.

Is the index input jumpered for TTL MODE? (W1 left)

Unless this is done, the results will be unpredictable.
 

Thanks for the info.

So the servo motors I'm looking at are integrated servo/driver/encoder and use stepper control signals. I'm under the impression that I would use a 7I95T card. Seeing as Y will have a slaved servo I'll be short one feedback channel. So I would get a 7I76 to plug in to the 7I95T correct? Then I will have all 7 feedback channels for the 4 servos and the 3 scales. It would also allow for future expansion of an A axis with feedback.

Now, If I go to run a spindle with encoder will that be handled by the 7I95T in addition to the 6 axis channels it has? Also, is this the only card I will need? It sounds like it runs ethernet to the PC and that is it.

So, my signal goes to true, but doesn't return to false once the wire is removed from GND. moreover, it doesn't happen every time. sometimes it works, sometimes it doesn't?

The standard 5i25_7i77x2.bit supports sserial on TB6

Do you have the added channel enabled in the hal file?

Hi all,I noticed that SOME conversational macros ( pocketing, Frame etc.) are currently missing from my install from last night? What key detail am I missing? I was under the impression they were part of the build? Im new to this and testing the software on my PC. 

See pics

other than that, looks great! 
Followed this install link kcjengr.github.io/probe_basic/quick_start.html 
 

Hi, i made it run (badly) with the 7i77 alone but decided to add a 7i84U for some further inputs to revive all features the machine originally had.
I can´t seem to make the TB6 sserial connection work with any bitfile included in the 5i25 repository. Its 6i25 P3 to P1 7i77 and TB6 to 7i84. Is there something available or something that might just work?
Best,
Lukas

Typically, unless you need linear encoder feedback, you can use servo/closed loop drives that
just have local feedback, (no feedback to LinuxCNC) so you don't need encoder inputs, other than
one for the spindle if you want to do spindle synchronized moves.

For a simple system, I would consider a 7I96S or 7I76EU (the main difference is the the 7I76EU has
more digital I/0.) If you are sure you want to add encoder feedback a 7I95T would make more sense,
though you can add an encoder daughtercard to a 7I96S or 7I76EU (7I85/7I89 = 4/8 added encoders)

I am new to the hobby CNC game. I currently have a little 3018that runs GRBL I bought to get my feet wet. My day job is CNC electronics maintenance so I have some experience with industrial controllers. What I would like to do is get a machine running with dual feedback. The biggest issue I have with the little guy is step loss. From what I have found you can run "closed loop" stepper systems which sort of solve the problem but not really so I want to build a system that will do exactly what I want and I was told LinuxCNC and a Mesa controller is the way to go. I have looked at the Mesa site and am thoroughly confused on the options. I see that I'm probably going to want an ethernet connection for real time. I'll have Linux running on a stand alone laptop so I want the controller external. I also know I'll need drivers for the servos and power supplies. Which controller and which daughter boards I need are the problem. I will build a 3 axis gantry machine with a slaved pair of Y motors. I would like future expandability options for a 4th axis down the road. I want all 3 axis to run rotary feedback on the motors as well as linear scales for each axis with machine primary positioning done from the scales and compared to the encoders. This is how industrial CNC machines run. Is this something that LinuxCNC and Mesa control boards can handle? If so can anyone help me out with selecting the mesa boards I would need to accomplish this?