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Thank You , I have had other things happening , ill try and work on it this weekend.

It's not speed that is the issue, it's regularity. Once you introduce a buffer you lose the ability for realtime response.
There's a reason that no USB development has been done for Linuxcnc.
Search the forum for questions related to USB and you'll get the same response over and over.
Mesa has one or two boards that have USB interfaces but none are used for Linuxcnc.

As previously stated, Ethernet, SPI or EPP are the way to go. USB maybe ok for control panels for non realtime input, but disconnection can be an issue.

I really suggest you look into it more, especially the difference between speed and regularity. You may also want to look to see if USB has any realtime drivers.

Should be something like:

sserial_port_0=000xxxxx

or

sserial_port_0=002xxxxx

Assuming you want the 7I84 to run in mode 2.

There is no sserial_port_1 in 7i77x2 configurations
(there is only sserial_port_0 with 6 channels, 3 for the first 7I77 and 3 for the second)

Yes, I overlooked the /usr/bin/pncconf in my search. The problem was that the pin number for the 7i95t first encoder port was 0 which caused "if self.d._arcvin ..." to evaluate to false. I fixed it by using "if self.d._arcvin != None ...".

Video on youtube?

Outside of my use of StepConf - any suggestion as to what I might want to look at to understand why the rapid moves of SHIFT-RT/LT/UP/DN/PG UP/PG DN just move a couple inches and then stop? Unless StepConf 'does' something in file I'm not overwriting from my previous working system.

Again - thanks in advance for any suggestions... I know I'm not the quickest getting back, I have a part time job in my retirement which is starting to occupy me more than I like.

Arden

This is the only place I noticed it set true:

                # for encoder pins
                elif widgetptype == _PD.ENCA:
                    #print"\nptype encoder"
                    halsignallist = 'hal_encoder_input_names'
                    humansignallist = _PD.human_encoder_input_names
                    addsignalto = self.d.halencoderinputsignames
                    relatedsearch = [_PD.ENCA,_PD.ENCB,_PD.ENCI,_PD.ENCM]
                    relatedending = ["-a","-b","-i","-m"]
                    customindex = len(humansignallist)-1
                    # check for a thcad encoder
                    if "Arc Voltage" in pinchanged:
                        self.d._arcvpin = pin
                    elif self.d._arcvpin == pin:
                        self.d._arcvpin = None
                    if self.d._arcvpin and self.d.frontend == _PD._QTPLASMAC:
                        self.p.page_set_state('thcad', True)
                    else:
                        self.p.page_set_state('thcad', False)

 

Thank you! Worked perfectly

You might also want to consider servo drives from Delta, Rexroth, or others that support direct connection of the linear encoders to the servo drive for full closed loop operation.  This is combination with absolute encoders on the servos is how I think most new machines are doing it...at least the ones I have seen.   They could be controlled from either Mesa or with Ethercat.

You can just replace the private_data.py file in /usr/lib/python3/dist-packages/pncconf with the private_data.py that is attached to my post. I would backup the original file first just in case.

Well MesaCT doesn't support QTPlasmaC at the moment. I have done some work on supporting it but haven't heard from JT if he's interested in bringing those changes in if I make a pull request.

Nice effort! How would one apply the changes to get 7i95t support in pncconf?

What are pros/cons of using pncconf vs mesa CT? github.com/jethornton/mesact

Sorry I should have had that in my initial post...yes I have QTPlasmaC selected as GUI.

Si la señal es cc lo mediré por tenerlo en cuenta pero si es mas seguro con el rele ssr creo que lo pondré.

Otra pregunta crees que es necesario tener picas de tierra separadas una en la caja de controles y otra en la mesa o no hay ningún problema en estar en la misma?gracias por todas tus respuestas

El plasma es trifasico

Did you also chose QTPlasmaC as the GUI?
(maybe that matters also)

when running said bitfile and using

loadrt hm2_pci config="sserial_port_0=7i77,2500000 sserial_port_1=7i84,2500000"

it doesn´t show a second sserial device when:

sudo mesaflash --device 5i25 --readhmid | grep -i sserial

Maybe i am using the wrong nomenclature or baudrate?