docs: more smallish changes during translations

Author: smoe

docs/src/plasma/plasma-cnc-primer.adoc

@@ -494,8 +494,7 @@ We can do this by doubling the machine's Z axis velocity and acceleration settin
 That way 100% of the maximum velocity and acceleration will be available for both probing and THC.
 
 Example:
-On a metric machine with a NEMA23 motor with a direct drive to a 5 mm ball screw,
-60 mm/s maximum velocity and 700 mm/s^2^ acceleration were determined to be safe values without loss of steps.
+On a metric machine with a NEMA23 motor with a direct drive to a 5 mm ball screw, 60 mm/s maximum velocity and 700 mm/s^2^ acceleration were determined to be safe values without loss of steps.
 For this machine, set the Z axis in the INI file as follows:
 
 [source,{ini}]
@@ -544,7 +543,7 @@ So assuming we have a 5 Volt input, the calculated frequency would be:
 
 So now it should be fairly clear how to convert the frequency to its voltage equivalent:
 
-Volts = (frequency [Hz] - 3800 Hz) / 2520 Hz/V
+Voltage = (frequency [Hz] - 3800 Hz) / (2520 Hz/V)
 
 === THCAD Connections