Please Note While Programming - HEIDENHAIN TNC 640 User Manual

Fixed Cycles: Pocket Milling / Stud Milling / Slot Milling | RECTANGULAR STUD (Cycle 256, DIN/ISO: G256)

Please note while programming:

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.
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
Danger of collision!
There is a danger of collision if there is insufficient room next to
the stud.
Depending on the approach position Q439, the TNC requires
room for the approach motion
Leave room next to the stud for the approach motion
At least tool diameter + 2 mm
At the end, the TNC positions the tool back to the set-
up clearance, or to the 2nd set-up clearance if one was
programmed. This means that the end position of the tool
after the cycle differs from the starting position.
HEIDENHAIN | User's manual for cycle programming | 10/2017
NOTICE
NOTICE
5
181