Cycle Parameters - HEIDENHAIN TNC 640 User Manual

11
Danger of collision!
If the spindle was switched on before calling the cycle, Cycle 18
switches the spindle off and the cycle works with a stationary
spindle! Cycle 18 switches the spindle on again at the end if it
was switched on before cycle start.
Program a spindle stop before starting the cycle! (e.g. with
M5)
After Cycle 18 has finished the spindle condition before cycle
start is restored. If the spindle was switched off before cycle
start, the TNC switches it off again at the end of Cycle 18.

Cycle parameters

Boring depth (incremental): Enter the thread depth
based on the current position Input range: -99999
to +99999
Thread pitch: Enter the pitch of the thread. The
algebraic sign entered here differentiates between
right-hand and left-hand threads:
+
depth)
-
358
Cycles: Special Functions | THREAD CUTTING (Cycle 18, DIN/ISO: G18)
NOTICE
= right-hand thread (M3 with negative hole
= left-hand thread (M4 with negative hole depth)
NC blocks
25 CYCL DEF 18.0 THREAD CUTTING
26 CYCL DEF 18.1 DEPTH = -20
27 CYCL DEF 18.2 PITCH = +1
HEIDENHAIN | User's manual for cycle programming | 10/2017