Lenze ETC Motion Control - Manual (Page 104)

CNC programming
G functions
G functions individual descriptions
3
3.2
3.2.2
l
104 EDSTCXN EN 2.0
Notes for the use of spline interpolation:
The spline interpolation is also allowed in connection with a tool radius
correction (TRC). It must be noted here that the TRC is executed before, i.e.
the spline interpolation takes place via the corrected grid points.
A spline interpolation via grid points, which are programmed in the polar
coordinate system, is possible.
The used algorithm for the spline interpolation also allows the backward
interpolation of the blocks.
In a block with grid points, an M function and fast outputs can be
programmed at the same time.
The use of modal comparative operations is possible. However, these must
not be programmed within the spline sequence. In the event of a
termination, the spline interpolation is switched off. The use of an interrupt
program is possible. The programmed points are approached in the
respective interpolation types. The use of the spline interpolation in the
interrupt program is not allowed.
During the indirect programming of the grid points it must be noted that
time−synchronized parameters cannot be accessed (e.g. current actual
position).
Changing between absolute dimensions and incremental dimensions is
possible. S/T change−overs and coordinate shifts are allowed. Jump
functions (G20, G22, G125) are also allowed.
Directly successive blocks with identical grid points are ignored. If additional
functions are programmed, these are also lost.