R12 Number Of Calibrating Elements; R13 Compensating Angle Position For Mono-Directional Probe; Angular Offset For Driven Tools - Siemens SINUMERIK 840 User Manual

2 Defining Parameters

2.4 R12 Number of calibrating elements

2.4 R12 Number of calibrating elements
The number of calibrating elements is determined via
(See machine tool manufacturer's specifications)
The number of the calibrating element at which the workpiece probe is to be calibrated must
be specified in R12.
2.5

R13 Compensating angle position for mono-directional probe,

angular offset for driven tools

MDC determines whether R13 must be defined.
(See machine tool manufaturer's specifications)
Compensating angle position for mono-directional probe
When using a mono-directional probe, it may be necessary for machine-specific reasons (e.g.
horizontal/vertical milling head) to compensate the position of the probe to be able to carry out
the measurement. The determination in Section 1.3.3 (measuring direction/spindle position 0°)
is no longer true because the milling head had been swivelled.
This wrong position can be compensated for by means of parameter R13. As a rule, R13=90°
or a multiple thereof.
If the direction changes because the milling head has been swivelled, then R13 must be preset
with -360° (usually 0°).
Angular offset for driven tools
For tool measurement with reversal of measurement (milling tools), the tool is automatically
swivelled by 180 degrees for the 2nd measuring point.
If the 2nd measuring point cannot be measured in this angular position, for example with
helical tooth T-slot mills, the angular position of the 2nd measuring point can additionally be
displaced with parameter R13.
2–4
MDC.
©
Siemens AG 1990 All Rights Reserved
SINUMERIK 840/850/880 (BN)
01.93
6FC5197- AB70