
3.INTERPOLATION FUNCTION NC FUNCTION B-63942EN/02
- 126 -
3.27 POLYGON TURNING
Polygon turning means machining a workpiece to a polygonal figure
by rotating the workpiece and tool at a certain ratio.
Workpiece
Tool
By changing conditions which are rotation ratio of workpiece and tool
and number of cutters, the workpiece can be machined to a square or
hexagon. The machining time can be reduced as compared with
polygonal figure machining using the polar coordinate interpolation.
The machined figure, however, is not exactly polygonal. Generally,
polygon turning is used for the heads of square and/or hexagon bolts
or hexagon nuts.
Format
G51.2 P_ Q_ ;
P,Q : Rotation ratio of spindle and Y-axis
Specify range:
P : Integer from 1 to 999
Q : Integer from -999 to -1 or from 1 to 999
When Q is a positive value, Y-axis makes positive
rotation.
When Q is a negative value, Y-axis makes negative
rotation.
G51.2 P_ Q_ ; Polygon turning cancel
NOTE
Specify G50.2 and G51.2 in a single block.