Time Sequence; Phase 1: Travel Across The Reference Marks With Synchronization - Siemens SINUMERIK 840D Function Manual

R1: Referencing
10.6 Referencing with distance-coded reference marks
10.6.3

Time sequence

Time sequence
Referencing with distance-coded reference marks can be divided into two phases:
● Phase 1: Travel across the reference marks with synchronization
● Phase 2: Travel to a fixed destination point
Figure 10-13 Distance-coded reference marks
10.6.4

Phase 1: Travel across the reference marks with synchronization

Phase 1: Start
To start the reference point approach, see Sections "Axisspecific referencing (Page 292)" and
"Channelspecific referencing (Page 294)".
Reference cam
In measuring systems with distance-coded reference marks, reference cams are not required
for the actual referencing action. For functional reasons, however, a reference cam is required
for channel-specific reference point approach and reference point approach from the part
program (G74) before the traversing range end of the machine axis.
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Axes and spindles
Function Manual, 06/2019, A5E47437747B AA