The ornamental design for a controller for servomotor, as shown and described.
FIG. 1 is a front, top, and right side perspective view of a controller for servomotor showing our new design;
FIG. 2 is a front, bottom, and right side perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof;
FIG. 9 is an enlarged view of the circumscribed area IX in FIG. 1; and,
FIG. 10 is an enlarged view of the circumscribed area X in FIG. 2.
The evenly spaced broken lines are directed to environment and form no part of the claimed design. The dot-dashed broken lines depict the bounds of the claimed design and form no part of the claimed design. The dot-dot-dashed broken lines in FIGS. 1, 2, 9, and 10 circumscribe the enlarged views and form no part of the claimed design.