Siemens SINUMERIK 840D sl Programming Manual page 161

Preconditions for differential measurement
● Spindle can be positioned between 0...360 degrees (at least every 90 degrees, with
● Multidirectional probe (all-round coverage)
Programming
CYCLE978
Measurement variants
Measuring cycle CYCLE978 permits the following measuring variants which are specified via
parameter _MVAR.
Value
0
100
1000
1100
Result parameters
Depending on the measuring variant, measuring cycle CYCLE978 makes the following
values available as results in data block GUD5:
Parameters
_OVR [0]
_OVR [1]
_OVR [2]
_OVR [3]
_OVR [4]
_OVR [5]
_OVR [6]
_OVR [7]
_OVR [8]
_OVR [12]
_OVR [16]
_OVR [17]
_OVR [18]
_OVR [19]
_OVR [20]
_OVR [27]
_OVR [28]
_OVR [29]
_OVR [30]
Measuring cycles
Programming Manual, 03/2009 Edition, 6FC5398-4BP10-2BA0
SPOS command)
Measurement variant
Measure surface and tool offset
ZO determination on surface and ZO correction
Measure surface with differential measurement and tool offset
ZO determination on surface with differential measurement and ZO correction
Data type
REAL
REAL
REAL
REAL
REAL
REAL
REAL
REAL
REAL
1)
REAL
1)
REAL
REAL
REAL
REAL
REAL
1)
REAL
1)
REAL
REAL
1)
REAL
Measuring Cycles for Milling and Machining Centers
5.5 CYCLE978 workpiece: Measuring a surface parallel to the axis
Result
Setpoint value for measuring axis
Setpoint in abscissa → only when _MA=1
Setpoint in ordinate → only when _MA=2
Setpoint in applicate → only when _MA=3
Actual value for measuring axis
Actual value in abscissa → only when _MA=1
Actual value in ordinate → only when _MA=2
Actual value in applicate → only when _MA=3
Upper tolerance limit for measuring axis
Lower tolerance limit for measuring axis
Difference for measuring axis
Difference in abscissa → only when _MA=1
Difference in ordinate → only when _MA=2
Difference in applicate → only when _MA=3
Offset value
Zero offset area
Safe area
Dimensional difference
Empirical value
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