HEIDENHAIN TNC 640 (34059x-01) - Manual (Page 529)

HEIDENHAIN TNC 640 529
1
7.7 Unit of Measur
ement
17.7 Unit of Measurement
Application
This MOD function determines whether the coordinates are displayed
in millimeters (metric system) or inches.
„ To select the metric system (e.g. X = 15.789 mm), set the Change
MM/INCH function to mm. The value is displayed to 3 decimal
places.
„ To select the inch system (e.g. X = 0.6216 inches), set the Change
MM/INCH function to inches. The value is displayed to 4 decimal
places.
If you would like to activate the 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.