The Ball LEDs are the LEDs above the buttons marked 1–8. #1 and #2 have a S appended after the number. That S means those two buttons can be designated as serves, which to the robot simply means a brief pause is added before that ball is thrown, much like you would experience in a real game where you are waiting for your opponent to begin the serve. A normal ball is indicated by a lit orange LED. A serve is indicated by a lit green LED. Ball 1 LED and Ball 2 LED can both be either orange or green. You change it by repeatedly pressing the associated button for that ball.

If you have a single ball drill and that ball is programmed as Ball 1, and Ball 1 LED is green, you are telling the robot to insert a pause before every shot it delivers. Press the Ball 1 button repeatedly until that LED turns orange and then the ball feed will use the setting of the Ball/min knob.

Here’s an example—let’s say you have 3 balls programmed. Ball 1 LED is green and Ball 2 and Ball 3 LEDs are orange. Ball/min is set to 60 (1 second interval between ball throws). This is telling the robot:

Pause for a few seconds

Throw Ball 1

Wait 1 sec.

Throw Ball 2

Wait 1 sec.

Throw Ball 3

Pause for a few seconds

Throw Ball 1

Wait 1 sec.

Throw Ball 2

Wait 1 sec.

Throw Ball 3

Repeat

If Ball 1 was orange (instead of green), then the sequence is:

Throw Ball 1

Wait 1 sec.

Throw Ball 2

Wait 1 sec.

Throw Ball 3

Wait 1 sec.

Throw Ball 1

Repeat

If you only have Ball 1 programmed, and you have it designated a serve (green light), then the sequence is:

Pause for a few seconds

Throw Ball 1

Pause for a few seconds

Throw Ball 1

Repeat