HEIDENHAIN CNC Pilot 4290 - Manual (Page 20)

1 Introduction and Fundamentals 8
Incremental coordinates
Incremental coordinates are always referenced to the last
programmed position. They specify the distance from the last active
position and the subsequent position. Each position on a workpiece is
clearly defined by its incremental coordinates.
Polar coordinates
Positions located on the face or lateral surface can either be entered
in Cartesian coordinates or polar coordinates.
When programming with polar coordinates, a position on the
workpiece is clearly defined by the entries for diameter and angle.
You can enter polar coordinates as absolute or incremental values.
Units of measurement
You can program and operate 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.
Measure Metric inch
Coordinates mm inch
Lengths mm inch
Angles 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
1
.4 F
undamentals