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Cantilever machine

Term to describe a technical type of CNC-machining centres and router heads, where the working spindle as well as other existing processing units are mounted on the cantilever.

Construction

This technical type is a mechanical copying router and is now usually used in small, lightweight machines that depend on space-saving design, high flexibility (because of the construction that is open on one side, much larger workpieces can be placed inside the machine than it can actually process) and low-cost solutions. Due to the design, the stiffness towards the end of the cantilever continuously decreases. Therefore, this design has its limits for processing with very high precision, very high cutting forces and very large workpiece dimensions.

Versions

  • Single or double cantilever with an aggregates support in between
  • Fixed cantilever and machine table movable in X and Y (so-called cross-table; today no longer in use in woodworking)
  • Cantilever, movable on one axis and machine table movable on an axis (barely found); are occasionally used in machining centers, which are integrated into through-feed machine lines and where the forward movement in X also allows for the through-feed.
  • Fixed table and cantilever movable in X, on which the driven and guided arm for the realization of the Y-axis is located (due to its high demand on space no longer in use today)
  • Fixed table and cantilever movable in X, movement in Y is realized by moving the working spindle or the aggregates support on the cantilever. Since this is the most space-saving version without significant disadvantages, this is the common type of cantilever machines.

Special version since the early 2000s

The cantilever is stabilized on its end on prism guides by a ride-along support, similar to the gantry machine. This allows for a higher and more uniform stiffness of the cantilever with the same material profiles.

See also:

Images

Auslegermaschine mit Doppelausleger
WEEKE, 1996
Auslegermaschine Urform Oberfräse
SCM, 1990