Siemens SINUMERIK 840 User Manual page 83

10.91
Radial tools
Tool
Radial tool form
type
28
38
Measuring
point 2
R
The tool dimension L1 is measured separately for each compensation and stored. The average
value of the two measurements in the abscissa provides tool dimension L2 for the 1st and 2nd
compensation.
The cutter radius is determined from half the dimensional difference between measuring point
1 and measuring point 2.
Calculation of tool geometry:
1st offset number
L1=L1(compensation 1)
L2=(L2,1+L2,2) / 2
R=ABS((L2,1 – L2,2) / 2)
R26 start angle position of driven tools.
If a cutter is to be measured at off-centre measuring points, the tool must be moved to a
defined angular position to the measuring cycle. To achieve this, the tool must be preset to the
correct position.
The starting angle is specified with R26.
R13 angular offset of driven tools when using reversal measurement.
When using reversal measurement, the tool is swivelled automatically by 180 degrees for the
2nd measuring point.
If measurement of the 2nd measuring point is not possible in this angular position, for example
with helical-tooth T slot cutters, the angular position of the 2nd measuring point can be
displaced additionally with parameter R13.
©
Siemens AG 1990 All Rights Reserved
SINUMERIK 840/850/880 (BN)
Tool geometry
Compensation 1
L1
L2
Compen-
sation 2
L1
Compensation 2
com-
pensa-
L1, L2=0, R
tion 1
Measuring
point 1
2nd offset number
L1=L1(compensation 2)
L2=(L2,1+L2,2) / 2
R=ABS((L2,1 – L2,2) / 2)
6FC5197- AB70
4 Measuring Cycles for Turning Machines
4.1 L972/L982 Tool measurement
Dimension
dimensions compensations
Compensation 1
L1, L2=0,R L1, R
L1, L2, R L1, L2, R
Compensation 2
L1, R
L1, L2, R L1, L2, R
4–9