HEIDENHAIN MANUALplus 620 195
4.4 Contour Form Elements
Thread (general) G37-Geo
G37 defines the different types of thread. Multi-start threads and
concatenated threads are possible. Threads are concatenated by
programming several G01/G34 blocks after each other.
Example: G37
. . .
FINISHED
N1 G0 X0 Z0
N2 G1 X20 BR-2
N3 G1 Z-30
N4 G37 Q2[metric ISO]
N5 G25 H7 I1.7 K7
N6 G1 X30 BR-1.5
N7 G1 Z-40
N8 G37 F1.5 [metric ISO fine-pitch thread]
N9 G25 H7 FP1.5
N10 G1 X40
N11 G1 Z-60
. . .
Parameters
Q Type of thread (default: 1)
1: Metric ISO fine-pitch thread (DIN 13 Part 2, Series 1)
2. Metric ISO thread (DIN 13 Part 1, Series 1)
3: Metric ISO tapered thread (DIN 158)
4: Metric ISO tapered fine-pitch thread (DIN 158)
5: Metric ISO trapezoid thread (DIN 103 Part 2, Series 1)
6: Flat metric trapezoid thread (DIN 380 Part 2, Series 1)
7: Metric buttress thread (DIN 513 Part 2, Series 1)
8: Cylindrical round thread (DIN 405 Part 1, Series 1)
9: Cylindrical Whitworth thread (DIN 11)
10: Tapered Whitworth thread (DIN 2999)
11: Whitworth pipe thread (DIN 259)
12: Nonstandard thread
13: UNC US coarse thread
14: UNF US fine-pitch thread
15: UNEF US extra-fine-pitch thread
16: NPT US taper pipe thread
17: NPTF US taper dryseal pipe thread
18: NPSC US cylindrical pipe thread with lubricant
19: NPFS US cylindrical pipe thread without lubricant
F Thread pitch
Required for Q=1, 3 to 7, 12.
For other thread types, F is calculated from the diameter if it
was not programmed.
P Thread depth—enter only for Q=12
K Run-out length for threads without undercut (default: 0)
D Reference point (default: 0)
0: Runout of thread at the end of the reference element
1: Runout of thread at the beginning of the reference
element
H Number of thread turns (default: 1)
A Thread angle at left—enter only for Q=12
W Thread angle at right—enter only for Q=12
R Thread width—enter only for Q=12
E Variable pitch (default: 0)
Increase/decrease the pitch per revolution by E.
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