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Ff1 : Feed rate

(1) The arc plane is designated by G17, G18 or G19.
(2) G02 or G03 is used to designate the direction of the arc rotation.
(3) Absolute or incremental values can be assigned for the arc end point coordinates and the end
point coordinate of the linear axis, but incremental values must be assigned for the arc center
coordinates.
(4) The linear interpolation axis is the other axis which is not included in the plane selection.
(5) Command the speed in the component direction that represents all the axes combined for the
feed rate.

Pitch l1 is obtained by the formula below.
l1 = z1/((2π
•
p1 + θ )/2π )
θ = θ e – θ s = arctan (ye/xe) – arctan (ys/xs)
Where xs, ys are the start point coordinates (0 ≤ θ < 2 π )
xe, ye are the end point coordinates
The combination of the axes which can be commanded simultaneously depends on the
specifications. The axes can be used in any combinat ion under the specifications. The feed rate is
controlled so that the tool always moves at a speed along the circumference of the circle.