HEIDENHAIN TNC 406 - Manual (Page 151)

130 8 Programming: Cycles
8.1 Gener
a
l Ov
erview of Cy
cles
8.1 General Overview of Cycles
Frequently recurring machining sequences which comprise several
working steps are stored in the TNC as standard cycles. To enter the
required data the user only has to respond to questions asked by the
TNC.
Cycles are divided into the following groups:
„ GENERATOR, for basic information on the eroding process.
„
CONTOUR, for machining closed contours.
„
DISK, which allows you to easily carry out many different tasks, and
EROSION TIME LIMIT, which depends on the DISK cycle.
„ TOOL DEF, which allows you to define electrodes with
compensation values.
„ Coordinate transformation cycles for shifting, rotating, mirroring,
enlarging and reducing contours.
„ Special cycles: dwell time and program call.
Prerequisites
Before a cycle call you must have programmed:
„
BLK FORM for graphic display
„ Electrode call
„ Positioning block for starting position X, Y
„ Positioning block for starting position Z (set-up clearance)
Start of effect
All cycles except PGM CALL go into effect as soon as they are
defined. PGM CALL must be called.
Dimensions in the electrode axis
Infeeds in the electrode axis always refer to the position of the
electrode at the moment the cycle is called. The TNC interprets the
coordinates as incremental dimensions; you do not have to press the
I key.
OEM cycles
The machine tool builder can prepare additional cycles and
store them in the TNC’s ROM. These cycles can be called
with the cycle numbers 30 to 99. Refer to your machine
tool manual.
The control goes to the first available OEM cycle when the
GOTO OEM CYCLE soft key is pressed.