Measure Shaft, Groove, Web; General Information - Siemens SINUMERIK 840D sl Programming Manual

5.6.2

Measure shaft, groove, web

5.6.2.1

General information

Function
Using this measuring cycle and various _MVAR measuring variants the following contour
elements can be measured at an angle:
● _MVAR=x01 ⇒ hole
● _MVAR=x02 ⇒ shaft
● _MVAR=x03 ⇒ groove
● _MVAR=x04 ⇒ web
If no tool offset or ZO correction is to be applied, _KNUM=0 should be set.
Detailed information on the parameters: see Parameter description section "Description of
the most important defining parameters".
Measuring principle for hole or shaft
The measuring cycle measures points P1, P2, P3 and/or also P4 inside the hole and/or
when outside the hole by passing the shaft.
The position of the points is determined by starting angle _STA1, indexing angles _INCA, the
diameter and the set center point.
These four measured values are used to calculate the actual value of the diameter and
position of the center point in the abscissa and ordinate relative to the workpiece zero.
Measurement is performed in the radial direction:
● toward the set center point in the case of shaft,
● away from the set center point in the case of a hole.
The sum of the starting angle plus all incremental angles must not exceed 360 degrees.
Measuring cycles
Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
Measuring Cycles for Milling and Machining Centers
5.6 CYCLE979 workpiece: Measure hole/shaft/groove/rib at an angle
175