Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 518)

Dresser/Wheel Radius Compensation
Chapter 15
15-30
There is no limit to the number of blocks that can follow the programming
of G41 or G42 before an entry move takes place. The entry move is
always the same regardless of the number of blocks that do not program
motion in the current plane for compensation.
Example 15.6
Sample Entry Move After Non-Motion Blocks
Assume current compensation plane is the ZX plane.
N01X0Z0;
N2G41; This block commands compensation left.
N3M02; This is not the entry block since no axis
motion takes place in the current plane.
N4...; No axis motion in current plane.
N5...; No axis motion in current plane.
N6...; No axis motion in current plane.
” ”
” ”
” ”
N999X1Z1; This is the entry move for the previously
programmed G41.
Although there is no limit to the number of non-motion blocks allowed
before entering compensation, your system installer must select in AMP
the number of non-motion blocks that are allowed during dresser/wheel
radius compensation. If this number of non-motion blocks is exceeded
during compensation, dresser/wheel radius compensation must be
re-initialized with a new entry move being generated. For details on too
many non-motion blocks during compensation, see page 15-46.
Cancel the radius compensation feature by programming a G40. The path
that is taken when the dresser/wheel leaves radius compensation is referred
to as the exit move. The path that the dresser/wheel follows during an exit
move depends on:
The direction of compensation (G41 or G42)
The angle between the last motion made in dresser/wheel radius
compensation (in the current compensation plane) and the motion of the
of the exit move
15.5.2
Type B Compensation Exit
Moves