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It is ok?
Milko 

With Linuxcnc running and a  S1000M3 MDI command executed,
 what does:

halcmd show all | grep pwm

report?

(halcmd typed in a terminal window)

Wow.! Thank you for the deep explanation.! Let me try that. Because I am no fan of step/dir method which is unreliable and prone to many isues like EMI. Since Ethercat is free and Ethercat Based servos have become relatively inexpensive. I am going to give a shot. 

If the comp table is backwards then the interpolator function will only ever read the first value, so you will get a fixed offset, and no apparent compensation.

Your HAL looks correct.
When you say "in the oszy" do you mean in the HAL oscilloscope , or on a physical one?

In the HAL oscilloscope try scoping both the index-enable signal and the hm2_7i80.0.encoder.00.input-index pin.

If index-enable is high then it should go low when the (short) input-index pulse is seen. 
The index-enable pin should go high as soon as the home switch trips. 
 

  Hello,
between pins 22 and 23 I find 10V
between pins 22 and 24 also 10V
I don't see any change if I lower the speed
if I stop the spindle
between 22 and 23 0V
22 and 24 10V

Thank you

Miilko

I think it was an attempt to link to this thread.

forum.linuxcnc.org/plasma-laser/41893-ci...ng-to-cnc-use#202415

And now that we know that it is CigWeld CutSkill, not Gig SkillCut we might have more idea what is being discussed.

As setup, if you have 10V on Spindle+ (7I96S TB3.24) and you run s1000M3
in MDI, you should get +5V measured from Spindle-Out  (7I96 STB3.23)
to Spindle- (7I96S TB3.22)

(you do have to home the machine before MDI will work)

I would verify this before worrying about the VFD setup