Spigot - Rectangular Spigot (Cycle977) - Siemens SINUMERIK 840D sl Programming Manual

For workpiece measurement with tool offset or correction in the work offset, additional
parameters are displayed, see Additional result parameters (Page 342).
3.3.16

Spigot - rectangular spigot (CYCLE977)

Function
This measuring variant can be used to measure a rectangular spigot on a workpiece. The
spigot width and spigot length are measured as well as the spigot center point determined.
The measurements are always performed parallel to the geometry axis of the active plane.
Measurements are also possible at a rectangular spigot rotated around the infeed axis. To do
this, an angle corresponding to the real spigot position must be entered in the parameterization
axis. Probing at the sides of the spigot is always at right angles to these.
A protective zone can be defined around the spigot.
With the "3D probe with spindle reversal" measuring method, measurement is performed in
the axes of the plane as differential measurement. Two complete measurements of the
rectangular spigot are automatically carried out one after the other, one with a spindle position
of 180 degrees, and one with 0 degrees. The special procedure for this measurement permits
the use of an uncalibrated multi-directional probe. However, the correct tool radius of the probe
must be determined once by calibrating the probe. Probe types 712, 713 and 714 are not
suitable for this purpose. A positionable spindle is mandatory.
With the "Align 3D probe" measuring method, the switching direction of the probe is always
aligned to the current measuring direction. This function is recommended when high demands
are placed on the measuring accuracy. Probe types 712, 713 and 714 are not suitable for this
purpose. A positionable spindle is mandatory.
The measurement result (measurement difference) can be used as follows:
● Correction of a WO so that the workpiece zero is in relation to the center point of the
rectangular spigot
● Offset of a tool
● Measurement without offset
Measuring principle
Two opposite points in each of the two geometry axes of the plane are measured. The
measurements start in the positive direction of the 1st geometry axis. The spigot width and the
spigot length are calculated from the four measured actual positions of the spigot sides, taking
into account the calibration values. Corresponding to the work offset selected to be corrected,
the position of the spigot center is determined as the workpiece zero. The measuring
differences of the side lengths are used as the basic variable for a tool offset. The position of
the spigot zero as basis for the work offset.
Measuring cycles
Programming Manual, 12/2017, 6FC5398-4BP40-6BA1
Measuring variants
3.3 Measure workpiece (milling)
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