Edge Distance - Groove (Cycle977) - Siemens SINUMERIK 840D sl Programming Manual

3.3.9

Edge distance - groove (CYCLE977)

Function
This measuring variant can be used to measure a groove in a workpiece. The groove width is
measured and the groove center point determined. Measurements at an inclined groove are
also possible. To do this, an angle corresponding to the actual angularity of the groove position
should be entered into the parameterizing screen form. Probing at the groove edge always
takes place at right angles. A protection zone can be defined in the groove.
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 groove
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 groove center point.
● Offset of a tool
● Measurement without offset
Measuring principle
One point at each of the opposite edges of the slot are measured based on the selected
measuring axis. The positive direction of the geometry axis is measured first.
From the two actual positions, taking into account the calibration values, the groove width is
calculated.
The position of the groove center as workpiece zero is determined corresponding to the work
offset selected to be corrected.
With the selection Setpoint center point "YES", the position of the groove center can be defined
as workpiece zero through setpoint specifications.
Measuring cycles
Programming Manual, 12/2017, 6FC5398-4BP40-6BA1
Measuring variants
3.3 Measure workpiece (milling)
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