Approaching A Reference Point; Referencing Axes - Siemens SINUMERIK 840D sl Operating Manual

Setting up the machine

2.2 Approaching a reference point

2.2 Approaching a reference point
2.2.1

Referencing axes

Your machine tool can be equipped with an absolute or incremental path measuring system.
An incremental path measuring system must be calibrated after being switched on, but an
absolute path measuring system does not.
For the incremental path measuring system, all the machine axes must therefore first
approach a reference point, the coordinates of which are known to be relative to the machine
zero-point.
Sequence
Prior to the approach, the axes must be in a position from where they can approach the
reference point without a collision.
The sequence or direction is defined by the PLC program.
The axes can also all approach the reference point simultaneously, depending on the
manufacturer's settings.
NOTICE
If the axes are not in a collision-free position, you must first traverse them to safe positions
in "JOG" or "MDA" mode.
You must follow the axis motions directly on the machine!
Ignore the actual value display until the axes have been referenced!
The software limit switches are not active!
Procedure
44
Machine manufacturer
Please refer to the machine manufacturer's specifications.
1. Press the "JOG" key.
2. Press the "REF POINT" key.
3. Select the axis to be traversed.
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Operating Manual, 01/2008, 6FC5398-7AP10-0BA0
HMI sl Turning