HEIDENHAIN SW 688945-03 - Manual (Page 46)

46 Introduction and fundamentals
1
.7 F
undamentals
Workpiece zero point
To machine a workpiece, it is easier to enter all input data with respect
to a zero point located on the workpiece. By programming the zero
point used in the workpiece drawing, you can take the dimensions
directly from the drawing, without further calculation. This point is the
workpiece zero point. It is designated with the letter "W" (see figure).
Units of measure
You can program the CNC PILOT either in the metric or inch system.
The units of measurement listed in the table below apply to all inputs
and displays.
Dimensions Metric Inches
Coordinates mm inch
Lengths mm inch
Angle Degrees Degrees
Spindle speed rpm rpm
Cutting speed m/min ft/min
Feed per revolution mm/rev inch/rev
Feed per minute mm/min inch/min
Acceleration m/s 2 ft/s 2