JUGS Sports Curveball (2 wheel) Pitching Machine - Manual (Page 19)

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Throwing Curveballs:
1. Place toggle switch on the Control Panel in the ON position (figure 4.) Gradually
turn right-hand speed dial to full clockwise position. The right wheel will be
turning rapidly clockwise and the left wheel will be turning slowly counter-
clockwise.
a. The above will result in the maximum right-hand curve. Dial settings should
be reversed for a left-hand curve.
b. For overhand curves, loosen lock knob and tilt pitching machine to a 65
degree angle with faster turning wheel highest.
c. To increase the speed of the ball, turn dial for slower turning wheel clock-
wise.
d. To reduce the speed of the ball, or to reduce the amount of curve, turn dial
counter-clockwise for the faster turning wheel.
2. Loosen Handle Bar lock knob (figure 3) and adjust until desired trajectory is
attained, then tighten securely. For fine adjustments, loosen lock knob
slightly and adjust Handle Bar down, or sideways. (It is normal to throw
five or six test balls before arriving at the curve setting and aim point you
desire.) Always have the batter and others stand clear while adjusting your
JUGS pitching machine and throwing test balls.
3. Be sure to try different settings. For example, when throwing a right-hand
curve, set the right hand dial at 70, 75, or 80 and the left hand dial at 30,
35, or 40. Observe the curve and speed of the ball and decide whether the
settings used give you the speed and type of curve desired. Most coaches
devise a table for the operators of the pitching machine to show what set-
tings to use for any given practice.
NOTE:
The greater the speed differential between the wheels, the greater the curve.
Conversely, a small differential will result in a smaller curve.
Operation