Feedback 360° Servo Test

Only for FEEDBACK 360° SERVOS
If you are using external encoders, go to External Encoder Test instead.

It's time to test your Feedback 360° servos' encoder signal connections, to make sure they are in proper working order.  If all is well, the example program below will cause the built-in LED on the Activity Board to blink on and off when you gently turn a wheel by hand.  

  • Log into your BlocklyProp account, and run the BlocklyProp Client on your computer.
  • Create a new project, named Test Encoders.
  • Build the project shown below. Be sure to set the Robot initialize block's drop-down menu to ActivityBot 360°.

  • Turn the robot's power switch (PWR) to Position 2.
  • Click the Load and Run button.
  • With your hand, gently twist the ActivityBot's left wheel. This movement should make the P26 LED turn on and off as you rotate the wheel.
  • Repeat for the right wheel.  Turning the right wheel should make the P27 LED turn on and off.

 

If It Doesn't Work

Here are some symptoms and causes:

P26 light stays off while turning the left wheel.

  • The left feedback signal wire may be plugged into the wrong pin on the P14 servo port.
  • The left feedback signal wire may be plugged into the P15 servo port instead.
  • The left servo's 3-pin cable might be plugged in backward.
  • The shunt jumper might be missing or incorrectly set on the voltage selector pins next to the P12/P13 servo port.

P27 light stays off while turning the right wheel.

  • The right feedback signal wire may be plugged into the wrong pin on the P15 servo port.
  • The right feedback signal wire may be plugged into the P14 servo port instead.
  • The right servo's 3-pin cable might be plugged in backward.
  • The shunt jumper might be missing or incorrectly set on the voltage selector pins next to the P12/P13 servo port.

P27 light instead of P26 light blinks while turning the left wheel (or vice versa).

  • The encoder cables are swapped! Switch the encoder cables plugged into P14 and P15.

 

If Both Encoders Work

Congratulations! It is time to calibrate your ActivityBot.