5238-E P-175
SECTION 8 LATHE AUTO-PROGRAMMING FUNCTION (LAP)
LAP-Related Parameters (2/2)
NC Parameters
[Supplement]
XB
X coordinate of rough turning condition
change point B
No change of cutting
conditions at point B
|XB| ≤ 99999.999
ZA
Z coordinate of rough turning condition
change point A
No change of cutting
conditions
|ZA| ≤ 99999.999
ZB
Z coordinate of rough turning condition
change point B
No change of cutting
conditions at point B
|ZB| ≤ 99999.999
Parameter Description Default
Data Setting
Range
U
Stock removal in X-axis direction for
finish turning cycle
U = 0 U ≥ 0
W
Stock removal in Z-axis direction for
finish turning cycle
W = 0 W ≥ 0
H
Thread height in G88 thread cutting
cycle
Alarm H > 0
B
Tip point angle of thread cutting tool in
G88
B = 0 0 ≤ B < 180°
Parameter Contents Initial Value
Optional parameter
(OTHER FUNCTION 1)
Relieving amount in LAP-bar turning (0.001 mm) 100
LAP clearance (0.001 mm) (LAP4 only) 2000
Infeed pattern in thread cutting cycle Infeed pattern 3
• The following words must be specified as incremental values.
D, DA, DB, U, W and H
• D, DA, DB, XA, XB, U and H words must be commanded as diameter values.
• In thread cutting cycles using the M73 pattern, "H - U" must be greater than or equal to D:
H - U ≥ D
• In the M74 and M75 patterns, it must be positive:
H - U ≥ 0
• When more than one alphabetic character is used in succession, the control interprets the
expression as a variable. Therefore, it is necessary to use a delimiter for extended address
characters:
DA =, DB =, FA =, FB =, XA =, XB =, ZA = and ZB =
Parameter Description Default
Data Setting
Range
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