
B-63942EN/02 NC FUNCTION 3.INTERPOLATION FUNCTION
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3.26 CIRCULAR THREADING
Using the G35 and G36 commands, a circular thread, having the
specified lead in the direction of the major axis, can be machined.
L
L : Lead
Fig. 3.26 (a) Example of circular threading
Format
A sample format for the G18 plane (Z-X plane) is indicated below.
When using the format for the G17 plane (X-Y plane), change the
addresses Z, X, K, and I to X, Y, I, and J respectively. When using
the format for the G19 plane (Y-Z plane), change the addresses Z, X,
K, and I to Y, Z, J, and K respectively.
G35
G36
X(U)_ Z(W) _
I_ K_
R_
F_ Q_ ;
G35 : Clockwise circular threading command
G36 : Counterclockwise circular threading
command
X(U), Z(W) : Specify the arc end point (in the same way
as for G02, G03).
I,K : Specify the arc center relative to the start
point, using relative coordinates (in the same
way as for G02, G03).
R : Specify the arc radius.
F : Specify the lead in the direction of the major
axis.
Q : Specify the shift of the threading start angle
(0° to 360°, with least input increment of
0.001) (The value cannot be programmed
with a decimal point.)
Note) U and W can be used only with the lathe system.