HEIDENHAIN TNC 640 (34059x-05) Cycle programming - Manual (Page 300)

Cycles: Special Functions
11.8 ENGRAVING (Cycle 225, DIN/ISO: G225)
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TNC 640 | User's Manual Cycle Programming | 1/2015
11.8 ENGRAVING (Cycle 225,
DIN/ISO: G225)
Cycle run
This cycle is used to engrave texts on a flat surface of the
workpiece. The texts can be arranged in a straight line or along an
arc.
1 The TNC positions the tool in the working plane to the starting
point of the first character.
2 The tool plunges perpendicularly to the engraving floor and mills
the character. The TNC retracts the tool to the set-up clearance
between the characters when required. After machining
the character, the tool is at the set-up clearance above the
workpiece surface.
3 This process is repeated for all characters to be engraved.
4 Finally, the TNC retracts the tool to the 2nd set-up clearance.
Please note while programming:
The algebraic sign for the cycle parameter DEPTH
determines the working direction. If you program
DEPTH=0, the cycle will not be executed.
If you engrave the text in a straight line (
Q516=0),
the starting point of the first character is determined
by the tool position at the time the cycle is called.
If you engrave the text along an arc (
Q516=1), the
arc's center is determined by the tool position at the
time the cycle is called.
The text to be engraved can also be transferred with
a string variable (
QS).