HEIDENHAIN TNC 320 (340 55x-03) - Manual (Page 305)

HEIDENHAIN TNC 320 305
8.5 SL Cy
cles
Program defaults for cylindrical surface
machining cycles (software option 1!)
Machine and control must be specially prepared by the
machine tool builder for use of this cycle.
Before programming, note the following
In the first NC block of the contour program, always
program both coordinates.
The memory capacity for programming the cycle is limited.
You can program up to 1000 contour elements in one
cycle.
The TNC can run the cycle only with a negative depth. If a
positive depth is entered, the TNC will output an error
message.
This cycle requires a center-cut end mill (ISO 1641).
The cylinder must be set up centered on the rotary table.
Set the reference point to the center of the rotary table.
The spindle axis must be perpendicular to the rotary table
axis when the cycle is called; switching of the kinematics
may be required. If this is not the case, the TNC will
generate an error message.
This cycle can also be used in a tilted working plane.
The set-up clearance must be larger than the tool radius.
The machining time can increase if the contour consists of
many non-tangential contour elements.