Heidenhain MANUALplus 4110 User Manual Page 188

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188 4 Cycle Programming
4.6 Thread and Undercut Cycles
Internal thread and thread undercut
The machining operation is to be performed in two
steps. Thread undercut DIN 76 produces the undercut
and thread chamfer. In the second step, the thread
cycle cuts the thread.
First step
The parameters for the undercut and thread chamfer
are programmed in two superimposed input windows
(see figure at bottom right and figure on next page at
top right).
MANUALplus determines the undercut parameters
from the standard table.
For the thread chamfer, you only need to enter the
chamfer width. The angle of 45° is the default value
for the "1st cut angle WB."
Tool data
Lathe tool (for internal machining)
WO = 7—Tool orientation
A = 93°—Tool angle
B = 55°—Point angle
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