Programming instructions

Reference
Project Lead The Way © and Carnegie Mellon Robotics Academy © / For use with VEX
®
Robotics Systems
Servo Motors • 1
Servo Motors Overview
A Servo Module (or Servo Motor) rotates its shaft to a set angular position, between 0 and
120 degrees. Once its position has been set in a ROBOTC program, the Servo Module will
continually draw power to maintain that position until another is specied. Servo Modules can
be plugged into any of the MOTORS ports in ROBOTC.
Servo Modules are typically and appropriately found in robotic grippers and arms because
of their small range of motion, ability to be set to a specic position, and ability to hold that
position. They can be set to values ranging from -127 to 127, with -127 being fully rotated
one way and 127 fully rotated the other.
Mounted Servo Module
Here, the Servo Module is mounted on
Squarebot 3.0. It allows the arm to be
rotated and held at specic positions.
The only differences in appearance
between the VEX Servo and Motor
Modules are their labels on the back,
but the two should not be confused.
When a Motor Module is set equal
to a value, it uses that value as a
power setting and starts spinning its
shaft in continuous rotations. When
a Servo Module is set equal to a
value, however, it uses that value to
rotate its shaft to a position and hold
it there.
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