HEIDENHAIN TNC 640 (34059x-01) ISO programming - Manual (Page 455)

HEIDENHAIN TNC 640 455
16.7 Unit of Measur
ement
16.7 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.