Please Note While Programming - HEIDENHAIN TNC 620 User Manual

8
Fixed Cycles: Cylindrical Surface | CYLINDER SURFACE (Cycle 39, DIN/ISO: G139, software option 1)

Please note while programming:

This cycle performs an inclined 5-axis machining
operation. To run this cycle, the first machine axis below
the machine table must be a rotary axis. In addition, it
must be possible to position the tool perpendicular to
the cylinder surface.
In the first NC block of the contour program, always
program both cylinder surface coordinates.
The algebraic sign for the cycle parameter DEPTH
determines the working direction. If you program
DEPTH=0, the cycle will not be executed.
Ensure that the tool has enough space laterally for
contour approach and departure.
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.
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.
Define the approaching behavior in ConfigDatum,
CfgGeoCycle, apprDepCylWall
CircleTangential:
Tangential approach and departure
LineNormal: The movement to the contour starting
point is not performed on a tangential path, but on a
straight line
Danger of collision!
If the spindle is not switched on when the cycle is called a
collision may occur.
Define whether the TNC issues an error message
if the spindle is not switched on via the parameter
displaySpindleErr, on/off.
The function needs to be adapted by your machine
manufacturer.
264
NOTICE
HEIDENHAIN | TNC 620 | User's manual for cycle programming | 10/2017