Measuring Contour Elements; General Information - Siemens SINUMERIK 840D sl Programming Manual

Measuring Cycles for Milling and Machining Centers
5.4 CYCLE977 workpiece: Measure hole/shaft/groove/web/rectangle parallel to axes
5.4.2

Measuring contour elements

5.4.2.1

General information

Function
Using this measuring cycle and various _MVAR measuring variants the following contour
elements can be measured:
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
Two points each are measured in the abscissa and ordinate. The actual position of the
center point (CP) in relation to workpiece zero is calculated from these four measured
values. The actual diameter is calculated from the two points in the ordinate.
The center of the abscissa is calculated from the two points in the abscissa. Then the probe
is positioned on this calculated center and the two points on the ordinate measured. The
hole and shaft center points are now known and the results entered in array _OVR[ ].
The positive direction of an axis is measured first.
142
_MVAR=xxx1 - hole
_MVAR=xxx2 - shaft
_MVAR=xxx3 - groove
_MVAR=xxx4 - web
_MVAR=xxx5 - rectangle, inside
_MVAR=xxx6 - rectangle, outside
Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
Measuring cycles