Please Note While Programming - HEIDENHAIN TNC 640 User Manual

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Please note while programming:

Machine and TNC must be specially prepared by the
machine tool builder for use of this cycle.
This cycle is effective only for machines with servo-
controlled spindle.
Program a positioning block for the starting point (hole
center) in the working plane with radius compensation
R0.
The algebraic sign for the cycle parameter DEPTH
determines the working direction. If you program
DEPTH=0, the cycle will not be executed.
After machining, the TNC positions the tool back at the
starting point of the machining plane. This way, you can
continue positioning incrementally.
If the functions M7 or M8 were active before calling the
cycle, the TNC will reconstruct this previous state at the
end of 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 you select the disengaging
direction incorrectly. Any existing mirroring in the work plane is
not taken into account for the disengaging direction. However,
active transformations are considered with disengaging.
Check the position of the tool tip when you program a
spindle orientation to the angle that you enter in Q336 (for
example, in the Positioning with Manual Data Input mode
of operation). No transformations should be active here.
Select the angle so that the tool tip is parallel to the
disengaging direction
Select the disengaging direction Q214 so that the tool moves
away from the edge of the hole
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NOTICE
NOTICE
Fixed Cycles: Drilling | BORING (Cycle 202, DIN/ISO: G202)
HEIDENHAIN | User's manual for cycle programming | 10/2017