Frame of Reference of a Servo Motor =================================== ## Basic Definitions Reference coordinates for servo motors is defined below. - A normal vector which extends from the side of adding a gear, is defined as a negative vector of y axis. - Rotation direction for a positive vector of y axis, is subject to the right-hand rule. An angle of a servo that is controllable by PWM, is defined below. - Range of movement is defined as differences between an angle when input min PWM and an angle when input max PWM. - The neutral angle of range of movement, is defined as 0 [deg]. ## Specifications Each PLEN's Servos Have - **PLEN1.4** Rotate clockwise by increasing PWM width. - **PLEN2** Rotate counter clockwise by increasing PWM width.