Siemens SINUMERIK 840Di Function Manual page 1484

Detailed Description
2.8 Referencing in follow-up mode
Sequence
1. Initial situation: Neither of the measuring systems are referenced:
2. Reference the indirect measuring system according to the measuring system type:
3. Traverse the machine axis across the parameterized number of reference marks.
2.8 Referencing in follow-up mode
2.8
Functionality
Incremental measuring systems and measuring systems with distance-coded reference
marks can be referenced even when the machine axis is in follow-up mode. This requires
that reference point approach be properly parameterized according to the measuring system
in use (see "Referencing with incremental measuring systems" and "Referencing with
distance-coded reference marks").
When referencing in follow-up mode the machine axis is moved not by the NC but by means
of an external travel movement over the encoder zero mark and the parameterized number
of distance-coded reference marks. The measuring system is referenced when the encoder
zero mark or parameterized number of distance-coded reference marks are detected.
Note
Reproducibility of the referencing result
In NC-guided reference point approach, reproducibility of the referencing result is ensured
through adherence to the assigned traverse velocities during the referencing operation.
During referencing in follow-up mode, responsibility for achieving reproducibility of the
referencing results lies with the machine manufacturer/user.
2-44
– MD30242 $MA_ENC_IS_INDEPENDENT[
During actual value adjustment, the passive direct measuring system is adjusted to
the actual position of the active indirect measuring system, but is not marked as
referenced. After the parameterized number of reference marks have been crossed,
the passive direct measuring system is automatically referenced. Referencing is
performed in every operating mode.
DB31, ... DBX60.4 = 0 (referenced/synchronized 1)
DB31, ... DBX60.5 = 0 (referenced/synchronized 2)
DB31, ... DBX60.4 = 1 (referenced/synchronized 1)
DB31, ... DBX60.5 = 0 (referenced/synchronized 2)
This automatically references the direct measuring system:
DB31, ... DBX60.4 = 1 (referenced/synchronized 1)
DB31, ... DBX60.5 = 1 (referenced/synchronized 2)
measuring system
] = 2
Reference Point Approach (R1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0