Operational Sequence; General Information; Calibrating A Workpiece Probe In The Applicate Determining Probe Length - Siemens SINUMERIK 840D sl Programming Manual

Measuring Cycles for Milling and Machining Centers
5.3 CYCLE976 calibrate workpiece probe
5.3.4.3

Operational sequence

Position before measuring cycle call
The probe must be positioned facing the calibration surface.
Recommended distance: >_FA.
Position after end of measuring cycle
When calibration is complete the probe (ball radius) is distance _FA from the calibration
surface if _MA=3, if _MA=1 or _MA=2 it is at the starting position.
5.3.5

Calibrating a workpiece probe in the applicate determining probe length

5.3.5.1

General information

Function
Using this measuring cycle and the _MVAR=10000
measuring variant, a workpiece probe can be calibrated in the tool axis (applicate) on a
known surface with sufficiently good surface roughness and which is perpendicular to the
measuring axis.
This can be done on a workpiece, for example.
The trigger point of the relevant axis and axis direction is calculated and entered in the
workpiece probe array _WP[i,5] provided.
At the same time length 1 (L1) of the probe is calculated according to the setting of
_CBIT[14] and entered in the tool compensation memory:
• _CBIT[14]=0: L1 referred to ball center
• _CBIT[14]=1: L1 ref. to ball circumference
Prerequisite
The probe must be called as a tool with a tool length offset.
Tool type, preferably: 710
When using the cycle on a turning machine: set type 5xy and _CBIT[14]=0.
Notice
If you want to position with the tool in the program, the approximate probe length should be
known and entered in the tool offset memory. Otherwise, position the probe with JOG in front
of the calibration surface.
The exact ball radius must be known and entered.
The first time calibration is performed the default setting in the array of the probe is still "0".
Therefore:
_TSA> probe ball radius must be programmed to avoid alarm "Safe area violated".
5-44
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Measuring cycles