Heidenhain MANUALplus 4110 User Manual Page 162

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162 4 Cycle Programming
4.6 Thread and Undercut Cycles
4.6 Thread and Undercut
Cycles
Thread position
MANUALplus determines the direction of the thread
from the parameters for starting point Z (or current
tool position in Manual mode) and end point Z2. You
select internal or external thread by soft key.
Undercut position
MANUALplus determines the position of an undercut
from the parameters for starting point X, Z (current
tool position in Manual mode) and cylinder starting
point X1 / end point Z2 on plane surface.
Thread and undercut cycles Symbol
Thread cycle
Longitudinal single or multi-start thread
Tapered thread
Tapered single or multi-start thread
API thread
Single or multi-start API thread (API: American
Petroleum Institute)
Undercut DIN 76
Thread undercut and thread chamfer
Undercut DIN 509 E
Undercut and cylinder chamfer
Undercut DIN 509 F
Undercut and cylinder chamfer
These cycles machine single or multi-
start longitudinal and tapered threads,
as well as thread undercuts.
In Manual mode you can:
Repeat the last cut to compensate for
tool inaccuracies.
Use the function Recut to rework
damaged threads.
Threads are cut with constant speed.
"Cycle STOP" becomes effective at the
end of a thread cut.
The feed rate and spindle speed
overrides are not effective during cycle
execution.
An undercut may only be machined in a
right-angled paraxial contour corner in the
linear axis.
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