34
Programming in the workshop
– Field-proven cycles for recurring operations
Comprehensive fi xed cycles for
milling, drilling and boring
Frequently recurring operations that com-
prise several working steps are stored in
the TNC 640 memory as standard cycles.
You program them under conversational
guidance and are supported by graphics
that clearly illustrate the required input
parameters.
Standard cycles
Besides the fi xed cycles for drilling and
tapping (with or without fl oating tap
holder), there are optional cycles for thread
milling, reaming, boring and for hole
patterns, as well as milling cycles for
clearing plane surfaces, and for roughing
and fi nishing pockets, slots and studs.
Cycles for complex contours
Clearing pockets with combined contours
is aided greatly by Subcontour List cycles
(SL). This term is used to identify machining
cycles for pilot drilling, roughing and
fi nishing when the contour or subcontours
are specifi ed in subroutines. In this way,
one contour description can be used for
more than one operation using different
tools.
Up to twelve subcontours can be
superimposed for machining. The control
automatically calculates the resulting
contour and the tool paths for roughing or
clearing the surfaces. Subcontours can be
pockets or islands. Different components
are combined to form a single pocket in
which the tool avoids the islands.
The TNC 640 maintains a fi nishing
allowance on the wall and fl oor surfaces
during roughing. When roughing with
different tools, the control recognizes the
material remaining in inside corners so that
it can clear it with smaller tools. A separate
cycle is used for milling to the fi nished
dimension.
To Next Page
Loading...
