4. DESCRIPTION OF PARAMETERS
B–63980EN/01
110
#7
5484
#6 #5 #4 #3 #2 #1
CTI
#0
SDC
[Data type] Bit
SDC In normal direction control:
0 : A C–axis movement is automatically inserted between blocks so that
the C–axis is directed at right angles to the direction of motion at the
start point of each block. (After movement on the C–axis, movement
(along the X–axis and Y–axis) specified by the block is performed.)
1 : If the amount of C–axis movement is smaller than the value set in
parameter No.5485, a C–axis movement is not inserted before a
block. Instead, it is performed together with movement along the
X–axis and Y–axis.
CTI If such an arc that the vector from the center of the arc to a start point
rotates in the reverse direction after cutter compensation is specified
during normal direction control in the cutter compensation C mode:
0 : P/S 041 alarm is issued.
1 : The command is executed.
If this parameter is set to 1, and such an arc that the vector from the center
of the arc to a start point rotates in the reverse direction after cutter
compensation is specified during normal direction control in the cutter
compensation C mode (see the tool path from (4) to (5) in the figure
below), the tool is controlled so that the tool faces in the direction at right
angles to the move direction (programmed path) before cutter
compensation (see the tool path from (2) to (3) in the figure below).
Thus, as shown by the programmed path from (4) to (5) in the figure
below, the inside of an arc where the radius of the workpiece is smaller
than the compensation value of the tool can be cut.
(3)
(2)
(5)
(4)
(1)
Workpiece
Programmed path
Path after cutter compensation
Tool
(6)