HEIDENHAIN TNC 426 (280 476) Pilot - Manual (Page 73)

74
SL
Cycles
CYLINDER SURFACE (28)
This cycle requires a center-cut end mill (ISO 1641)!
Cycle 28 CYLINDER SURFACE enables you to program a slot in only
two axes and then machine it on a cylindrical surface without distort-
ing the angle of the slot walls.
Define a contour in a subprogram and list it in Cycle 14 CONTOUR
GEOMETRY.
CYCL DEF: Select Cycle 28 CYLINDER SURFACE
Milling depth Q1
Finishing allowance for side Q3: Enter the finishing allowance
(Q3>0 or Q3<0)
Set-up clearance Q6: Distance from the tool to the workpiece
surface
Plunging depth Q10
Feed rate for plunging Q11
Feed rate for milling Q12
Cylinder radius Q16: Radius of the cylinder
Dimension type? Deg=0 mm/inch=1 Q17: Coordinates in the
subprogram in degrees or millimeters
Slot width Q20
• The machine and TNC must be prepared for the CYLINDER
SURFACE CYCLE by the machine tool builder!
• The workpiece must be set up concentrically on the table!
• The tool axis must be perpendicular to the rotary table axis!
• Cycle 14 CONTOUR GEOMETRY can have only one label
number!
• A subprogram can hold no more than 128 line segments!
The unrolled contour