HEIDENHAIN TNC 320 User Manual page 210

Example: Cylinder surface with Cycle 28
Notes:
Cylinder centered on rotary table
Machine with B head and C table
Datum at center of rotary table
Description of the midpoint path in the
contour subprogram
0 BEGIN PGM C28 MM
1 TOOL CALL 1 Z S2000
2 L Z+250 R0 FMAX
3 I X+50 Y+0 R0 FMAX
4 PLANE SPATIAL SPA+0 SPB+90 SPC+0
TURN FMAX
5 CYCL DEF 14.0 CONTOUR GEOMETRY
6 CYCL DEF 14.1 CONTOUR LABEL 1
7 CYCL DEF 28 CYLINDER SURFACE
Q1=-7 ;MILLING DEPTH
Q3=+0 ;ALLOWANCE FOR SIDE
Q6=2 ;SET-UP CLEARANCE
Q10=-4 ;PLUNGING DEPTH
Q11=100 ;FEED RATE FOR PLNGNG
Q12=250 ;FEED RATE FOR MILLING
Q16=25 ;RADIUS
Q17=1 ;TYPE OF DIMENSION
Q20=10 ;SLOT WIDTH
Q21=0.02 ;TOLERANCE
210
Tool call, tool axis Z, diameter 7
Retract the tool
Position tool at rotary table center
Positioning
Define contour subprogram
Define machining parameters
Remachining active
Fixed Cycles: Cylindrical Surface