Setting The Zero-Point Offset - Siemens SINUMERIK 840D sl Operation/Programming Manual

Setting Up the Machine
2
2.7 Zero-point offsets
Work offsets
Coordinate
transformations
Total offset

2.7.1 Setting the zero-point offset

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Every work offset (G54 to G57, G505 to G599) consists of a coarse
offset and a fine offset. You can call the work offsets from any
sequential control program (coarse and fine offsets are added
together).
You can save the workpiece zero, for example, in the coarse offset,
and then store the offset that occurs when a new workpiece is
clamped between the old and the new workpiece zero in the fine
offset.
Fine offsets must be set up by the machine manufacturer.
Please also refer to the machine manufacturer's instructions.
For instructions on specifying and calling work offsets, see Secs.
"Defining work offsets" and "Calling work offsets".
You always program coordinate transformations for a specific
sequential control program. They are defined by:

Displacement

Rotation

Scaling

Mirroring
(See Sec. "Defining the coordinate transformations")
The total offset is calculated from the sum of all offsets and coordinate
transformations.
As an alternative to "Workpiece Zero-point," you can also save the
zero-point of the workpiece via "Set ZPO".
The offset (active zero-point offset or base offset) in which the new
zero-point is saved is set in machine data.
Please also refer to the machine manufacturer's instructions.
If the values are stored in the active work offset, they are stored in the
coarse offset and existing values in the fine offset are deleted.
The currently active work offset is displayed under the position window
for the axes.
Traverse the machine axes to the desired position, e.g. to the
front surface of the workpiece (see Sec. "Traversing Axes").
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
08/2005
2
♥ Siemens AG, 2005. All rights reserved