Parallax Feedback 360 High Speed Servo

The Parallax Feedback 360 High Speed Servo provides the functionality of a light-duty standard servo, continuous rotation servo, high-speed servo, and encoder in one convenient package. This is the servo on the ActivityBot 360 Robot.

Like most continuous rotation servos, the Feedback 360 is controlled by a 50 Hz pulse-width-modulation signal. What sets it apart is a return signal line from an internal Hall effect sensor system that provides digital angular position feedback.

Utilizing this feedback signal, your application can cause the servo to turn to and hold any angle, much like a standard servo but with an unlimited range of motion. Or, rotate the servo continuously at a controlled, verifiable speedup to 120 RPMas a robot drive motor. Control signal response is nicely linear across the speed control range.

Features:

• Bidirectional, continuous, feedback-controllable rotation from -120 to 120 RPM
• PWM positional feedback across entire angular range
• Internal Hall effect position sensor, which is not subject to wear or sensor deadband as are potentiometer-style feedback systems
• No need to manually center the servo
• 3-pin ground-power-signal cable plugs onto the Activity Boards 3-pin header
• Separate single wire with female connector supplies feedback to a separate I/O pin
• Fits our Small Robot Wheel and Tire and Servo Wheels

Application Ideas:

• Robot drive motors
• Small-scale animatronics
• Interactive artwork

Specifications:

• RPM: +/-120 w/feedback control, 140 max (+/- 10) @ 6 V, no load
• Gears: POM
• Case: Nylon & fiberglass
• Spline: 25-tooth, 5.96 mm OD
• Peak stall torque @ 6 V: 2.2 kg-cm (30.5 oz-in)
• Voltage requirements: 6 VDC typical, 58.4 VDC max range*
• Current requirements: 15 mA (+/- 10) idle, 150 mA (+/- 40) no-load, 1200 mA stalled
• Control signal: PWM, 35 V 50 Hz, 12801720 s
• Control signal zero-speed deadband: 14801520 s (+/- 10)
• Feedback sensor: Hall effect
• Feedback signal: PWM, 3.3V, 910 Hz, 2.797.1% duty cycle
• Product weight: 1.4 oz ( 40 g)
• Cable length: ~ 9.8 in (250 mm)
• Dimensions: approx. 2.15 x 1.46 x 0.79 in (50.4 x 37.2 x 20 mm)
• Mounting hole spacing: 10 x 49.5 mm on center
• Operating temperature range: 5 to 158 F (-15 to +70 C)

*5 VDC is absolute minimum required for no-load angular position control. 5.8 to 8 VDC is recommended for continuous rotation speed control.