Explanation Of Indexing Function Terms - Siemens SINUMERIK 840C Installation Instructions Manual

12 Functional Descriptions
12.13.2 Division from the PLC
Preparatory
function
G68 Positioning to division
number along shortest
direction of rotation within
360°
Limit: 1 to number of
divisions
ND = Number of Divisions
DRD = Division Reference Dimension
12.13.3

Explanation of indexing function terms

Number of divisions:
The number of divisions specifies the number of divisions (e.g. number of magazine locations)
per absolute dimension. Any integer between 1 and 999 is possible. The number 0 is not
possible!
The number of divisions is defined in NC MD 1104*.
Axis is an indexing axis:
This states that the indexing functions refer to this axis.
This is defined in NC MD 564*.
The axis can be a rotary or a linear axis.
Actual indexing position:
The actual indexing position is the location of the magazine location that has been approached.
Division number:
The division number states for incremental division (G91) the number of divisions by which the
axis must be positioned. Where absolute division is programmed (G90), the division number is
the setpoint indexing position to which the axis is to be positioned.
Division reference dimension:
The division reference dimension defines the reference path to which the number of divisions
refers (see illustration on next page).
Rotary axis: If the indexing axis is defined as a rotary axis, the reference dimension is 360
degrees.
Linear axis: The reference dimension corresponds to a linear path which is divided into
divisions.
The division reference dimension can be input by NC MD 1108*. No input need be made for
rotary axes since the dimension is set to 360 degrees internally in the control.
12–104
Rotary axis
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06.93
Linear axis
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6FC5197- AA50
SINUMERIK 840C (IA)