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Inspecting workpieces for proper
machining and dimensional accuracy
The TNC 640 features a number of mea-
suring cycles for checking the geometry of
the machined workpieces. To run the mea-
suring cycles, you insert a touch probe
from HEIDENHAIN (see page 45) into the
spindle in place of a tool. This enables you
to
• recognize a workpiece and call the
appropriate part program,
• check whether all machining operations
were conducted correctly,
• determine infeeds for finishing,
• detect and compensate tool wear,
• check the workpiece geometry and sort
the parts,
• log measured data,
• ascertain the machining error trend.
Automated machining
– The TNC 640 measures, manages and communicates
The difference in requirements placed on
the classical machine for tool and mold-
making and machining centers is becoming
ever less distinct. Of course, the TNC 640
is capable of controlling automated
manufacturing processes. It masters the
range of functions needed to start the
proper machining operations on individual
workpieces in any setup, and even in
interlinked machining.
Milling cutter measurement and
automatic compensation of tool data
Together with the TT and TL touch probes
for tool measurement (see page 46) the
TNC 640 can automatically measure milling
cutters while they are in the machine. The
TNC 640 saves the ascertained values of
tool length and radius in the central tool file.
By inspecting the tool during machining you
can quickly and directly measure wear or
breakage to prevent scrap or rework. If
the measured deviations lie outside the
tolerances, or if the monitored life of the
tool is exceeded, the TNC 640 locks the
tool and automatically inserts a replace-
ment tool.
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