Yaskawa YASNAC PC NC Programming Manual - Manual (Page 171)

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YASNAC PCNC Programming Manual Chapter 4: Enhanced Level Commands
(2) Arc Command (G71)
By using the arc pattern, hole machining positions are defined on the arc of radius “I” and
having the center at (X, Y). The positions are arranged on this arc – L, equally spaced in
angular intervals of K, and starting from a point at angle J measured from the X-axis.
G71X • • • Y • • • I • • • J • • • L • • • ;
Table 4.1.2.3 Description of Addresses
FIGURE 4.1.2.2 Arc Command (G71)
G code Function
X, Y Used to define the center of the arc. The values to be assigned to addresses X and Y
should conform to the specified dimensioning mode, G90 or G91.
I Used to specify the radius of the arc to be defined. The value must be positive and
can be set in units of least input.
J Used to set the angle of the first positioning point. The value should be set in units of
0.001 degree; the angle measured in the counterclockwise direction is expressed by
using a positive value.
K Used to set the angular intervals.
The values should be set in units of 0.001 degree, and positioning is executed, in the
counterclockwise direction when a positive value is specified.
L Used to set the number of positioning times. A positive value must be set.