Haas 96-8000 - Page 165

156
96-8000 Rev AC
May 2010
tion, only X and Y values are affected.
Entering a positive number (angle) for the R address will rotate the feature
counterclockwise.
If the angle of rotation (R) is not entered, then the angle of rotation is taken
from Setting 72.
In G91 mode (incremental) with Setting 73 ON, the rotation angle is changed
by the value in R. In other words, each G68 command will change the rotation
angle by the value specied in R.
The rotational angle is set to zero at the beginning of the program, or it can be
set to a specic angle using a G68 in G90 mode.
The following examples illustrate rotation using G68.
.
0001 (GOTHIC WINDOW) ;
F20, S500 ;
G00 X1. Y1. ;
G01 X2. ;
Y2. ;
G03 X1. R0.5
G01 Y1. ;
M99 ;
=Work coordinate origin
No Rotation
X
Z
Y
G68
The rst example illustrates how the control uses the current work coordinate
location as a rotation center (X0 Y0 Z0).
.
00002 ;
G59 ;
G00 G90 X0 Y0 Z0 ;
M98 P1 ;
G90 G00 X0 Y0;(Last Commanded Position)
G68 R60. ;
M98 P1 ;
G69 G90 G00 X0 Y0 ;
M30 ;
=Work coordinate origin
= Center of rotation
X
Z
Y
G68 Rotation
The next example species the center of the window as the rotation center.