Fanuc Symbol CAPi T Operators Manual

PROGRAMMING AND
OPERATION BY Symbolic FAPT
B–63304EN/02
3. EXECUTION OF
Symbolic FAPT
72
If the OUTER THREAD, INNER THREAD, or SQUARE THREAD soft
key is pressed, the system automatically specifies the value of D1
(threading depth). The value is calculated using the following expression:
Pitch = LD (LEAD) B NT (MULTIPLE)
OUTER THREAD:
Pitch (P) Constant
(system parameter 174, initial value 0.7578)
INNER THREAD: Pitch (P) Constant
(system parameter 125, initial value 0.6495)
SQUARE THREAD: Pitch (P) B (2 NT (MULTIPLE))
System parameters 125 and 174 specify the constants to be used when the
elements of threading are manually defined.
If the automatically specified value is not suitable, change it manually.
To define a trapezoid thread, manually enter the data.
After the value of D1 is entered, the system automatically specifies the
values of WIDTH (WT), DEPTH (DT), and CORNER R (R). The values
are calculated as shown below:
WIDTH (WT):
WT = 3.5 (constant) Pitch (P)
DEPTH (DT): DT = 1.2 (constant) Threading depth (D1)
CORNER R (R): R = 0.5 (constant) Pitch (P)
NOTE
1 The threading depth (D1) can be automatically determined
by pressing the OUTER THREAD, INNER THREAD, or
SQUARE THREAD soft key only when the values of LD
(LEAD) and NT (MULTIPLE) are specified.
2 If the value of LD (LEAD) or NT (MULTIPLE) is changed, the
D1 (threading depth) and DT (depth) must be calculated
again. Press the OUTER THREAD, INNER THREAD, or
SQUARE THREAD soft key to have the system
automatically specify suitable values.

Leave a Reply

Your email address will not be published. Required fields are marked *