Calibrating Tool Probes Automatically; Automatic Calibration - Siemens SINUMERIK 840D sl Programming Manual

5.2.4

Calibrating tool probes automatically

5.2.4.1

Automatic calibration

Function
Measuring variants
• _MVAR=100000 (machine-related)
• _MVAR=100010 (workpiece-related)
are used to calibrate the tool probe automatically.
The cycle uses the calibration tool to determine the tool probe trigger points in all axes and
loads them into the relevant data area of data block GUD6.
A measuring axis does not have to be specified in _MA.
Otherwise, the same parameters apply as for calibration of an axis.
Values are corrected without empirical and mean values.
Prerequisite
The approximate coordinates of the tool probe must be entered before calibration starts in
array _TP[_PRNUM-1, 0] to _TP[_PRNUM-1, 9] (machine-related) or _TPW[_PRNUM-1, 0] to
_TPW[_PRNUM-1, 9] (workpiece-related). These values must be so precise that the
parameter values of _TSA and _FA are fulfilled.
The precise length and radius of the calibration tool must be stored in a tool offset data
block. This tool offset must be active when the measuring cycle is called. Tool type 120 can
be entered. There is no special "calibration tool" type.
Machining plane G17, G18, or G19 must be defined before the cycle is called.
All the necessary parameters have been assigned values.
Parameter
Parameter Value
_MVAR
_FA
The following additional parameters are also valid:
_VMS, _TZL, _TSA, _PRNUM, _ID and _NMSP.
Set offset _ID=0 as standard.
See also
Variable measuring velocity: _VMS (Page 2-14)
Tolerance parameters: _TZL, _TMV, _TUL, _TLL, _TDIF and _TSA (Page 2-15)
Probe type, probe number: _PRNUM (Page 2-17)
Multiple measurement at the same location: _NMSP (Page 2-19)
Measuring cycles
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
Meaning
100000 Calibrate tool probe automatically (machine-related)
100010 Calibrate tool probe automatically (workpiece-related)
>0 Measurement path
Measuring Cycles for Milling and Machining Centers
5.2 CYCLE971 tool: Measuring milling tools, drills
5-17