Thc velocity low

The voltage of the battery is 7.6v and this is mi plasmac values and configure.  

That would seem to be a problem then. 

These two values in the config tab are what control that:
It would seem that you have not calculated them correctly, as a 7.6v battery should show 7.6v on the GUI.

You might try this calculator to help you: jscalc.io/calc/NTr5QDX6WgMThBVb

Otherwise we'd need more info about your setup.

Another stab in the dark, but can you check what is the value of
plasmac.thc-feed-rate
pin?

Thanks guys for your time, these are the values, actually the scale was fine since when I took out the wires from the plasma voltage I forgot to put the 1M resistor.  

Pretty sure you need to leave any scaling resistors in place when doing this test, and they need to be accounted for in the calculations for the calculations to be correct.

But I dont use a scaling resistor, and I've not done the math, so someone else will have to chime in and confirm.

All looks good, thank you.
Not related to this but you might want to change the VAD threshold to 60-70%.