HEIDENHAIN TNC 640 - Minimize setup times - The TNC 640 makes setup easy

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Minimize setup times
– The TNC 640 makes setup easy
Before you can begin machining, you must
first clamp the tool and set up the machine,
find the position and orient the workpiece
on the machine, and set the workpiece
reference point. This is a time-consuming
but indispensable procedure. After all, any
error directly reduces the machining
accuracy. Particularly in small and medium-
sized production runs, as well as for very
large workpieces, setup times become
quite a significant factor.
The TNC 640 features application-oriented,
real-world setup functions. They support
the user, help to reduce non-productive
time, and make overnight, unattended
production possible. Together with the
touch probes, the TNC 640 offers
numerous probing cycles for automatic
alignment of the workpieces, presetting,
and measurement of the workpiece and
the tool.
Delicate manual traverse
For setup, you can use the direction keys
to move the machine axes manually or in
incremental jog. A simpler and more
reliable way, however, is to use the
electronic handwheels from HEIDENHAIN
(see page 48). Particularly with the portable
handwheels you are always close to the
action, enjoy a close-up view of the setup
process, and can control the infeed
responsively and precisely.
Workpiece alignment
With HEIDENHAIN touch probes (see page
45) and the probing functions of the
TNC 640, you can forgo any tedious
manual alignment of the workpiece:
• Clamp the workpiece in any position.
• The touch probe ascertains the
workpiece misalignment by probing a
surface.
• The TNC 640 compensates the
misalignment with a “basic rotation,”
which means that in the NC program the
part is rotated by the measured
misalignment or by moving the rotary
table.
Compensating workpiece misalignment
Compensate misalignment by rotating the
coordinate system or turning the table