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I am trying to get my Huanyang 2.2 kw VFD working properly. 
I set it up as  andypugh  describes here. 
forum.linuxcnc.org/27-driver-boards/3537...wiring-to-mesa-7i76e

I am still doing setup in pncconf and trying to do as much there as I can. I added the spindle setup and enabled spindle output in TB4. 
I am have been setting up for 10v speed control though I would love to use PWM if it was possible. 
Set voltage, max RPM, etc, in the spindle section of pncconf. 
I'm not sure whether I should be using "use +-voltage for direction" but it is not working properly either way. 
I was having issues with it only spinning one direction but messing with settings I do have it spinning both directions and with "invert motor direction" checked in the proper direction though it seems weird I should need to have that checked since it should all be set up to spin the proper direction. 

As it is set up right now it doesn't seem like the Mesa card is doing what it should be doing. 
If I start up linuxcnc and hit the spindle button it goes straight to 23k RPM and 9.5v on pin2-VI. 
If I slide the spindle override down it stays at 9.5v and RPM till it gets to about 30% and then drops to like 0.15v and spindle RPM drops to 3400 RPM per VFD display. Spindle speed is either 23k or 3.4k RPM. I haven't looked but maybe I set up a min speed in the VFD at some point. 

I also measured weird voltages on forward and reverse terminals but I don't remember all variables like whether I had +- voltage ticked. 
When I measured though I think with CW in Linuxcnc I measured 24v on forward terminal to ground and 24v between forward and reverse terminals. But when I put it in reverse (and the spindle did reverse) I showed no voltage between the ground I used before and no voltage between forward and reverse. 

I can't be bothered to set up and log into the forum on the machine right now but I can upload files or whatever if needed. I just have to imagine that either this is a simple fix or that there is a more comprehensive guide somewhere. 
The most frustrating thing with this is in a google search I have found like 6 different threads, how tos, etc, with wiring digrams that show 6 different ways and virtually no info on other settings to make the wiring configuration work properly. 


 

Thank you very much for your guidance.

I tested that the Flex GUI is very fast without QPlainTextEdit and plotter.


The problem is in QPlainTextEdit, can it be optimized not to load the full G-CODE file?

I had this machine running years ago on a cheap controller. Then bought this 7i76e and got some basic functionality then the machine went into storage for years. 
Now I'm trying to get it properly set up and add some features. 
I thought I would make a thread for this phase of the project instead of each individual question. 

 

Yes, I just tested it and it gets everything