Programming Example - Siemens SINUMERIK 840D sl Programming Manual

Measuring Cycles for Milling and Machining Centers
5.5 CYCLE978 workpiece: Measuring a surface parallel to the axis
5.5.4.2

Programming example

1-point measurement in X axis with tool compensation
A surface parallel with the Y axis has been machined with milling tool T20, D1 on a set-up
workpiece.
This surface should be positioned exactly 100.000 mm in the X axis from the defined
workpiece zero and be measured.
If the absolute value of the difference determined is >0.01, the radius of this tool is to be
automatically offset in the wear.
1 mm is assumed to be the maximum
permissible deviation of the position of the
surface.
To obtain a minimum measuring path of 1
mm, the measuring path is programmed as
_FA= 1+1=2 mm
(max. total measuring path = 4 mm).
The offset must take the empirical value in
memory _EV[19] into consideration. Mean
value calculation _MV[19] and inclusion in
calculation are also to be used.
This tool offset will therefore affect the production of the next workpieces or possible
remachining.
Clamping for workpiece:
Zero offset, with settable ZO G54: NVx, NVy, ...
The probe is already calibrated. Arrays for workpiece probe 1: _WP[0, ...]
Workpiece probe 1, used as tool T9, D1, is
to be used.
The following is entered under T9, D1 in
the tool offset memory:
Tool type (DP1):
Length 1 - geometry (DP3):
Radius - geometry (DP6):
Length 1 (L1) must refer to the center of
the probe ball (_CBIT[14]=0), as for
calibration.
Careful when positioning! Radius R in
length (L1) is ignored.
5-78
710
L1 = 50.000
R = 3.000
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Measuring cycles