HEIDENHAIN SW 68894x-02 - Manual (Page 120)

120 Machine mode of operation
3.13
Units
of
measur
e
3.13 Units of measure
The CNC PILOT is operating in either the metric or inch system. The
units and decimal places in the displays are given and entries
interpreted according to the units of measure.
The inch/metric setting is also evaluated for the displays and entries in
Tool management.
Make the metric/inch setting in the user parameter "System/Definition
of unit of measure in effect for display" (Page 523). Changed metric/
inch settings become effective immediately, with no need for a
restart.
The basic block display also switches to inches.
inch Metric
Units
Coordinates, lengths, path data inch mm
Feed rate in./rev or in./min mm/rev or mm/
min
Cutting speed ft/min m/min
Number of decimal places in displays and input
Coordinate data and path data 4 3
Compensation values 5 3
 The unit is defined in all NC programs, Metric programs
can be run with an active inch mode and vice versa.
 New programs are made with the selected unit.
 Refer to your machine manual if you want to know
whether and how the handwheel resolution can be set
to inches.