Fixed Cycles: Pattern Definitions
6.2 POLAR PATTERN (Cycle 220, DIN/ISO: G220)
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HEIDENHAIN | TNC 320 | User’s manual for cycle programming | 9/2016
Cycle parameters
Q216 Center in 1st axis? (absolute): Pitch circle
center in the reference axis of the working plane.
Input range -99999.9999 to 99999.9999
Q217 Center in 2nd axis? (absolute): Pitch circle
center in the secondary axis of the working plane.
Input range -99999.9999 to 99999.9999
Q244 Pitch circle diameter?: Diameter of the pitch
circle. Input range 0 to 99999.9999
Q245 Starting angle? (absolute): Angle between the
reference axis of the working plane and the starting
point for the first machining operation on the pitch
circle Input range -360.000 to 360.000
Q246 Stopping angle? (absolute): Angle between
the reference axis of the working plane and the
starting point for the last machining operation on
the pitch circle (does not apply to complete circles).
Do not enter the same value for the stopping angle
and starting angle. If you enter the stopping angle
greater than the starting angle, machining will be
carried out counterclockwise; otherwise, machining
will be clockwise. Input range -360.000 to 360.000
Q247 Intermediate stepping angle? (incremental):
Angle between two machining operations on a
pitch circle. If you enter an angle step of 0, the
TNC will calculate the angle step from the starting
and stopping angles and the number of pattern
repetitions. If you enter a value other than 0, the
TNC will not take the stopping angle into account.
The sign for the angle step determines the working
direction (negative = clockwise). Input range
-360.000 to 360.000
Q241 Number of repetitions?: Total number of
machining positions on the pitch circle. Input range
1 to 99999
Q200 Set-up clearance? (incremental): Distance
between tool tip and workpiece surface Input range
0 to 99999.9999
Q203 Workpiece surface coordinate? (absolute):
Coordinate of the workpiece surface. Input range
-99999.9999 to 99999.9999
NC blocks
53 CYCL DEF 220 POLAR PATTERN
Q216=+50 ;CENTER IN 1ST AXIS
Q217=+50 ;CENTER IN 2ND AXIS
Q244=80 ;PITCH CIRCLE
DIAMETR
Q245=+0 ;STARTING ANGLE
Q246=+360;STOPPING ANGLE
Q247=+0 ;STEPPING ANGLE
Q241=8 ;NR OF REPETITIONS
Q200=2 ;SET-UP CLEARANCE
Q203=+30 ;SURFACE COORDINATE
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