HEIDENHAIN iTNC 530 177
6.3 LINEAR PATTERN (Cycle 221, DIN/ISO: G221)
Cycle parameters
U Starting point 1st axis Q225 (absolute): Coordinate
of the starting point in the reference axis of the
working plane.
U Starting point 2nd axis Q226 (absolute): Coordinate
of the starting point in the minor axis of the working
plane.
U Spacing in 1st axis Q237 (incremental): Spacing
between each point on a line.
U Spacing in 2nd axis Q238 (incremental): Spacing
between each line.
U Number of columns Q242: Number of machining
operations on a line.
U Number of lines Q243: Number of passes.
U Rotational position Q224 (absolute): Angle by
which the entire pattern is rotated. The center of
rotation lies in the starting point.
U Setup clearance Q200 (incremental): Distance
between tool tip and workpiece surface, alternatively
PREDEF.
U Workpiece surface coordinate Q203 (absolute):
Coordinate of the workpiece surface.
U 2nd setup clearance Q204 (incremental): Coordinate
in the spindle axis at which no collision between tool
and workpiece (fixtures) can occur, alternatively
PREDEF.
U Moving to clearance height Q301: Definition of how
the tool is to move between machining processes.
0: Move to the setup clearance between operations.
1: Move to the 2nd setup clearance between
machining operations.
Alternatively PREDEF
Example: NC blocks
54 CYCL DEF 221 CARTESIAN PATTERN
Q225=+15 ;STARTING PNT 1ST AXIS
Q226=+15 ;STARTING PNT 2ND AXIS
Q237=+10 ;SPACING IN 1ST AXIS
Q238=+8 ;SPACING IN 2ND AXIS
Q242=6 ;NUMBER OF COLUMNS
Q243=4 ;NUMBER OF LINES
Q224=+15 ;ROTATIONAL POSITION
Q200=2 ;SETUP CLEARANCE
Q203=+30 ;SURFACE COORDINATE
Q204=50 ;2ND SETUP CLEARANCE
Q301=1 ;MOVE TO CLEARANCE
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