Heidenhain TNC 620 (34056x-04) Cycle programming Manual de usuario Pagina 119

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HELICAL THREAD DRILLING/MILLING (Cycle 265, DIN/ISO: G265,
software option 19)
4.9
4
TNC 620 | User's Manual Cycle Programming | 5/2013
119
Please note while programming:
Program a positioning block for the starting point
(hole center) in the working plane with radius
compensation R0.
The algebraic sign of the cycle parameters depth
of thread or sinking depth at front determines the
working direction. The working direction is defined in
the following sequence:
1. Thread depth
2. Depth at front
If you program a depth parameter to be 0, the TNC
does not execute that step.
If you change the thread depth, the TNC
automatically changes the starting point for the
helical movement.
The type of milling (up-cut/climb) is determined by
the thread (right-hand/left-hand) and the direction of
tool rotation, since it is only possible to work in the
direction of the tool.
Danger of collision!
Use the machine parameter displayDepthErr to
define whether, if a positive depth is entered, the
TNC should output an error message (on) or not (off).
Keep in mind that the TNC reverses the calculation
for pre-positioning when a positive depth is
entered. This means that the tool moves at rapid
traverse in the tool axis to set-up clearance below
the workpiece surface!
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