HEIDENHAIN CNC Pilot 4290 - Manual (Page 249)

HEIDENHAIN CNC PILOT 4290 237
■ Enter either ”I” or ”H”. The rule is: Thread
pitch / graduation = number of starts.
■ You can assign further attributes to the
thread (see ” 6.9.6 Machining
Attributes”).
■ Use the ”nonstandard thread” if you
want to use individual parameters.
Caution: Danger of collision!
The thread is generated to the length of
the reference element. For the machining
of threads without an undercut, it is
necessary to program the ”runout length
K” so that the overrun can be executed by
the CNC PILOT without danger of collision.
”Thread” soft keys
Define the direction of the thread
”Threads/inch” is entered instead of
”thread pitch”
6.5 Finished P
a
rt
Cont
our
Threads
Thread defines the different types of thread.
Parameters
Q:
Type of thread
■ Metric ISO fine-pitch thread (DIN 13 Part 2, Series 1)
■ Metric ISO thread (DIN 13 Part 1, Series 1)
■ Metric ISO taper thread (DIN 158)
■ Metric ISO tapered fine-pitch thread (DIN 158)
■ Metric ISO trapezoidal thread (DIN 103 Part 2,
Series 1)
■ Flat metric trapezoidal thread (DIN 380 Part 2, Series 1)
■ Metric buttress thread (DIN 513 Part 2, Series 1)
■ Cylindrical round thread (DIN 405 Part 1, Series 1)
■ Cylindrical Whitworth thread (DIN 11)
■ Tapered Whitworth thread (DIN 2999)
■ Whitworth pipe thread (DIN 259)
■ Nonstandard thread
■ UNC US coarse thread
■ UNF US fine thread
■ UNEF US extra fine thread
■ NPT US taper pipe thread
■ NPTF US taper dryseal pipe thread
■ NPSC US cylindrical pipe thread with lubricant
■ US cylindrical pipe thread without lubricant
V: Direction of rotation
■ Right-hand thread
■ Left-hand thread
D: Select reference point
■ Beginning of thread at starting point of element
■ Beginning of thread at end point of element
F: ■ Thread pitch
■ Threads/unit
The thread pitch/threads per unit must be specified for the
”metric fine-pitch thread, tapered thread and tapered fine-
pitch thread, trapezoid thread and flat trapezoid thread” as
well as for the ”nonstandard thread.” This parameter may be
omitted for the other types of threads. The thread pitch is
then calculated from the diameter (see section ”
11.1.5 Thread
Pitch”).
E: Variable pitch (increases/reduces the pitch per revolution by
E) – default: 0
L: Length of the thread (including runout length)
K: Runout length (for threads without undercut)
I: Division for determining the threads/unit
H: Number of thread turns – default: 1
A, W: Thread angle left/right – with nonstandard thread
P: Thread depth – with nonstandard thread
R: Thread width – with nonstandard thread