Siemens SINUMERIK 840C - Manual (Page 884)

06.93 12 Functional Descriptions
12.13.5 Traversing an indexing axis to the reference point
12.13.5 Traversing an indexing axis to the reference point
If the function is used machine-specifically, the indexing axis can be traversed to an
indexing-specific reference point. The distance between a zero mark and an indexing position
can be defined in MD ”Reference point offset”. The indexing axis does not have to be
traversed through a reference point to an indexing position. The axis is automatically traversed
to an indexing position on the next traversing movement after a reference point approach.
Example:
Linear axis; ND = 5 (number of divisions)
DRD = 200.000 µ m (division reference dimension)
Reference point = 140.000 µ m
Reference point offset = 0
2 3
140.000 µ m
µ m
4 5 1
200.000 µ m
6
Illegal
range
NC MD 244* should be preset as follows for machine-specific division:
MD 244* : Reference point offset
S = Distance between zero mark and an indexing position
If the function is used workpiece related, an indexing axis should be set as described above
in order to arrive at the defined division conditions. If the reference dimension, number of
divisions or the indexing axis are altered during machining, the actual division reference value
is lost.
Note:
The illegal range (indexing position < 1) must no be selected as the reference point.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50 12–109
SINUMERIK 840C (IA)