HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 130)

130 smart.Turn units
2.8 Units—Thr
eads
"API thread" unit
This unit cuts a single or multi-start API thread. The depth of thread
decreases at the overrun at the end of thread.
Unit name: G352_API / Cycle: G352 (see page 312)
Access to the technology database:
 Machining operation: Thread cutting
 Affected parameters: F, S
Thread form
O
Thread location
 0: Internal thread (infeed in +X)
 1: External thread (infeed in –X)
X1, Z1 Starting point of thread (X1: diameter value)
X2, Z2 End point of thread (X2: diameter value)
W Taper angle (reference: Z axis; –45°<W<45°)
WE Run-out angle (reference: Z axis; 0°<WE<90°; default: 12°)
F1 Thread pitch
U Thread depth (automatically for metric ISO threads)
Cycle form
I
Maximum infeed (radius)
H Kind of displacement (type of offset; offset between the
individual infeeds in cutting direction)
 0: Without offset
 1: From left
 2: From right
 3: Alternately left/right
V Type of infeed (for details, see page 126)
 0: Constant mach. X-section
 1: Constant infeed
 2: W/ remaining cutting (with distribution of remaining
cuts)
 3: W/o remaining cutting (without distribution of
remaining cuts)
 4: Same as MANUALplus 4110
 5: Constant infeed (same as 4290)
 6: Constant with distribute. (same as 4290)
A Approach angle (angle of infeed; reference: X axis; -
60°<A<60°; default: 30°)
R Remaining cut depth (only with V=4)
C Starting angle
D No. of gears (threads per unit)
Q No. no load (number of dry runs)
Further forms: see page 60