Siemens Sinumerik 840D Operating Turning page 134

Section 3
Notes
B510
B510
Offset of the coordinate system
To permit recurring machining operations to be carried out at various work
piece locations, a zero point offset can be programmed in all the available
axes.
X
e.g. G54
Zero point offset absolute, as
referred to the presently valid
work piece zero point
Programming example:
N10 G18 G54
N80 TRANS Z-10
N90 G00 X0 Z2
Zero point offset additive,
referred to the presently valid
work piece zero point or to possibly
previously activated Frames
Programming example:
N10 G18 G54
...
N80 TRANS Z-10
N90 G00 X0 Z2
...
N200 ATRANS Z-5
N210 G00 X0 Z2
N250 TRANS
N260 G00 X200 Z300
Page 4
Z
Code TRANS [X...] Z...
Explanation:
Turning plane G18 and zero point G54
activated
Zero point to Z-10 offset
Rapid traverse motion to the now valid
coordinate point X0 and Z2
Code ATRANS X... Z...
Explanation:
The point already offset in block N80 is now
offset by a further -5 mm in Z
Rapid traverse motion to the now valid
coordinate point X0 and Z2,
Deletion of all frames, G54 is once more
active
840D/828D SINUMERIK Operate