Please Note While Programming - HEIDENHAIN TNC 640 User Manual

Fixed Cycles: Pocket Milling / Stud Milling / Slot Milling | SLOT MILLING (Cycle 253, DIN/ISO: G253)

Please note while programming:

With an inactive tool table you must always plunge
vertically (Q366=0) because you cannot define a
plunging angle.
Pre-position the tool in the machining plane to the
starting position with radius compensation R0. Note
parameter Q367 (position).
The TNC automatically pre-positions the tool in the tool
axis. Observe Q204 2ND SET-UP CLEARANCE.
The algebraic sign for the cycle parameter DEPTH
determines the working direction. If you program
DEPTH=0, the cycle will not be executed.
If the slot width is greater than twice the tool diameter,
the TNC roughs the slot correspondingly from the inside
out. You can therefore mill any slots with small tools,
too.
The TNC reduces the infeed depth to the LCUTS tool
length defined in the tool table if the tool length is
shorter than the Q202 infeed depth programmed in the
cycle.
Danger of collision!
If you enter a positive depth with a cycle, the TNC reverses
calculation of the pre-positioning. This means that the tool
moves at rapid traverse in the tool axis to set-up clearance
below the workpiece surface!
Enter depth as negative
Enter in machine parameter displayDepthErr (No. 201003)
whether the TNC should output an error message (on) or not
(off) if a positive depth is entered
HEIDENHAIN | User's manual for cycle programming | 10/2017
NOTICE
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