HEIDENHAIN iTNC 530 (340 420) - Manual (Page 490)

462 12 MOD Functions
12.1
0
Unit of Measur
ement
12.10 Unit of Measurement
Function
This MOD function determines whether the coordinates are displayed
in millimeters (metric system) or inches.
n To select the metric system (e.g. X = 15.789 mm) set the Change
mm/inches function to mm. The value is displayed to 3 decimal
places.
n To select the inch system (e.g. X = 0.6216 inches) set the Change
mm/inches function to inches. The value is displayed to 4 decimal
places.
If you activate inch display, the TNC shows the feed rate in inch/min.
In an inch program you must enter the feed rate larger by a factor of
10.