Automatic Tool Measurement; General Information - Siemens SINUMERIK 840D sl Programming Manual

6.3.4

Automatic tool measurement

6.3.4.1

General information

Function
This cycle and its various measuring variants are for measuring tools automatically:
_MVAR=2: Turning tools (machine-related)
_MVAR=12: Turning tools (workpiece-related)
_MVAR=xxx02: Milling tools, drills (machine-related)
_MVAR=xxx12: Milling tools, drills (workpiece-related)
Workpiece-related or machine-related measurement require an appropriately calibrated tool
probe (see section "Calibrating tool probes" or "Calibrate tool probe automatically (machine
related)").
With milling tools/drills, the measurement is further specified in the 3rd to 5th digits of
parameter _MVAR. Here, SD 42950: TOOL_LENGTH_TYPE must be = 2
The function is as for non-automatic measurement.
In automatic measurement, all offsets are determined. These are then defined with the tool
type:
• Turning tool: both lengths (2 measurements), for cutting edge positions SL = 5, 6, 7, and
• Drill: Length according to axial or radial position (1 measurement)
• Milling tool: both lengths and radius (4 measurements), if the radius is specified as R=0,
The calculated offsets are entered in the active D number of the active tool. The offset
strategy is defined via _CHBIT[3] as for measurement.
The measuring cycle generates the approach blocks to the probe and the transverse
motions to measure length 1, length 2 and for the milling cutter, the radius too. A correctly
selected start position is needed.
Prerequisite
As for non-automatic tool measurement
Measuring cycles
Programming Manual, Release 04/2006, 6FC5398-4BP10-0BA0
8, only one length
only both lengths are established (2 measurements).
Measuring Cycles for Turning Machines
6.3 CYCLE982 tool: Measure turning and milling tools
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