
B–63682EN/01
20. AXES CONTROL
NC FUNCTION
141
θ
∆θ
#n
#2
#1
G77Ir Jθ P∆θ Kn Cxx ;
Cxx+∆θx (n–1)
Cxx+∆θ
Cxx
The angle position of the die (Tool) can be altered by the command from
tape, memory, and MDI.
In the past, a plurality of dies were required when the location was
different, even when the die shape was the same, but one die is sufficient
by optionally changing the die angle position, and 4 corners of a work can
be chamfered with a single die, thus reducing the die change time. In the
bolt hole circle, arc pattern function, and circular nibbling, the C–axis is
controlled automatically so that one side of a die always faces the center
of the circle at each hole position.
C–axis command is always regarded as an absolute command regardless
of incremental command (G91) and absolute command (G90).
C axis can be automatically positioned to the commanded position in the
smaller rotation angle from the present position.
This function allows a T command to be executed after positioning the
C–axis to the reference point automatically when the T command is
specified on the tape, memory or MDI if the T–axis can move only when
the C–axis is at the reference point (the fixed position on the machine at
which C–axis can be reached by the manual reference point return).
Synchronous C–axis control can be performed for the punch and die by
effecting control using either the same servo motor or separate servo
motors.
20.8
C AXIS CONTROL
20.8.1
Relation with
Absolute/Incremental
Command (G90/G91)
20.8.2
Positioning to Smaller
Angle Rotation
Direction
20.8.3
Relation Between T
Command and C Axis
Command
20.8.4
Controlling the Punch
and Die