Please Note While Programming - HEIDENHAIN TNC 620 User Manual

8
Fixed Cycles: Cylindrical Surface | CYLINDER SURFACE (Cycle 27, DIN/ISO: G127, software option 1)

Please note while programming:

Refer to your machine manual.
The machine and TNC must be prepared for cylinder
surface interpolation by the machine tool builder.
In the first NC block of the contour program, always
program both cylinder surface coordinates.
The memory capacity for programming an SL cycle is
limited. You can program up to 16384 contour elements
in one SL cycle.
The algebraic sign for the cycle parameter DEPTH
determines the working direction. If you program
DEPTH=0, the cycle will not be executed.
This cycle requires a center-cut end mill (ISO 1641).
The cylinder must be set up centered on the rotary
table. Set the preset to the center of the rotary table.
The spindle axis must be perpendicular to the rotary
table axis when the cycle is called. If this is not
the case, the TNC will generate an error message.
Switching of the kinematics may be required.
This cycle can also be used in a tilted working plane.
The set-up clearance must be greater than the tool
radius.
The machining time can increase if the contour consists
of many non-tangential contour elements.
When you use local QL Q parameters in a contour
subprogram you must also assign or calculate these in
the contour subprogram.
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HEIDENHAIN | TNC 620 | User's manual for cycle programming | 10/2017