Siemens SIMATIC S5 Manual page 130

Machine Data, Modes and Traversing Programs
Example: Tool offset with mode 15
A drilling program used to drill a hole 15 mm in depth is to carry out the follow-
ing steps:
1. Move the drill to the start position
2. Switch on the drill
3. Drill feed 15 mm
4. Return drill to the drilling position
5. Switch off the drill
6. Move the drill to the start position
The longer the drill is used, the more the drill depth decreases. When the drill
reaches a length of 40 mm, it can no longer drill a complete hole. The drill tip
remains in the workpiece. A tool offset shifts the coordinates. After being set to
the starting position (100), the drill can once again drill a complete hole.
Actual po- A
sition on
100
start
Location
of the drill
tip on start 150
A
Final
200
position
Location
of the drill
tip when
the final
drilling
250
position
has been
reached
5-58
B
Tool wear 100
140
B
200
240
Workpiece is no
longer com-
pletely drilled
TO = -10 mm 90
100
TO and posi-
tioning
190
200
Location of the drill
tip when the final
drilling position has
been reached
EWA 4NEB 812 6057-02
IP 266
B
B