Teach-in | Thread and undercut cycles
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HEIDENHAIN | MANUALplus 620 | User's Manual | 12/2017
5.6 Thread and undercut cycles
Menu item Meaning
The thread and undercut cycles machine
single or multi-start longitudinal and tapered
threads, as well as thread undercuts
In Teach-in mode you can
Repeat the last cut to compensate for tool inaccuracies
Use the Recut function to rework damaged threads (only in
Machine mode)
Threads are cut with constant rotational speed
Feed rate override is not effective during cycle
execution
Refer to your machine manual.
The machine manufacturer specifies whether the tool
is retracted immediately after NC stop or the thread is
completed.
Menu item Thread and undercut cycles
Thread. cycle
Longitudinal single or multi-start thread
Tapered thr.
Tapered single or multi-start thread
API thread
Single or multi-start API thread (API: Ameri-
can Petroleum Institute)
Undercut DIN 76
Thread undercut and thread chamfer
Undercut DIN 509E
Undercut and cylinder chamfer
Undercut DIN 509F
Undercut and cylinder chamfer
Direction of threads
The control determines the direction of the thread from the
parameters for Starting point Z (in Machine mode: current tool
position) and End point thread Z2. You select internal or external
thread by soft key.
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