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Parallax Continuous Rotation Servo (#900-00008)
The Parallax Standard Servo is ideal for adding bidirectional continuous rotation to your robotics projects.
Features
Bidirectional continuous rotation
0 to 50 RPM, with a linear response to PWM for easy
ramping
Accepts four mounting screws
Easy to interface with any Parallax microcontroller or
PWM-capable device
Very easy to control with the PULSOUT command in
PBASIC or SX/B
Weighs only 1.50 oz (42.5 g)
38 oz-in torque @ 6 V
Key Specifications
Power requirements: 4 to 6 VDC; Maximum current draw
140 +/- 50 mA at 6 VDC when operating in no load conditions, 15 mA when in static state
Communication: pulse-width modulation
Dimensions: approx 2.2 x 0.8 x 1.6 in (5.58x 1.9 x 4.06 cm) excluding servo horn
Operating temperature range: 14 to 122 °F (-10 to +50 °C)
Quick-Start Circuit
Vµ
Vservo
Vdd
I/O
Vss
Microcontroller
Vµ = microcontroller voltage supply
Vservo = 4 to 6 VDC, regulated or battery
I/O = PWM TTL or CMOS output signal, 3.3 to 5 V; < Vservo + 0.2 V
Copyright © Parallax Inc.
Web Site: www.parallax.com
Forums: forums.parallax.com
Sales: sales@parallax.com
Technical: support@parallax.com
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Continuous Rotation Servo
GND
Parallax Continuous Rotation Servo (#900-00008)
Office: (916) 624-8333
Fax: (916) 624-8003
Sales: (888) 512-1024
Tech Support: (888) 997-8267
v2.2 10/24/2011 Page 1 of 8
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Summary of Contents for Parallax Continuous Rotation Servo
- Page 1 Sales: sales@parallax.com Sales: (888) 512-1024 Technical: support@parallax.com Tech Support: (888) 997-8267 Parallax Continuous Rotation Servo (#900-00008) The Parallax Standard Servo is ideal for adding bidirectional continuous rotation to your robotics projects. Features Bidirectional continuous rotation 0 to 50 RPM, with a linear response to PWM for easy ramping ...
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Page 2: Device Information
Device Information The Parallax continuous rotation servo relies on pulse width modulation to control the rotation speed and direction of the serv o shaft. Before u sing the servo in a project, it is important to c alibrate the center position of the servo in order to defi ne the pul se width value at which the servo holds still (see the section Calibration –... - Page 3 Port connections Servo connections by wire color HomeWork Board with servo ports built on the breadboard, with a separate battery pack power supply for the servos. Copyright © Parallax Inc. Parallax Continuous Rotation Servo (#900-00008) v2.2 10/24/2011 Page 3 of 8...
- Page 4 The potentiometer is very sensitive so a very light touch will be required. {{ CenterParallaxServo.spin For centering Parallax Continuous Rotation Servo or holding Parallax Standard Servo at 90° position. Sends a 1.5 ms pulse approx every 20 ms }} _clkmode = xtal1 + pll16x ' System clock →...
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Page 5: Communication Protocol
Communication Protocol The Parallax Continuous Rotation Serv o is controlle d through pulse width modulation. Rotational speed and direction are determi ned by the d uration of a high pulse, i n the 1.3– -1.7 ms range. In order for smooth rotation, the servo needs a 20 ms pause between pulses. - Page 6 ' change I/O pin for servo signal here FOR counter = 1 TO 100 ' Rotate counterclockwise for ~3 seconds PULSOUT servoPin, 850 PAUSE 20 NEXT Copyright © Parallax Inc. Parallax Continuous Rotation Servo (#900-00008) v2.2 10/24/2011 Page 6 of 8...
- Page 7 2 seconds, and rotates counterclockwise at full speed for another 2 seconds. This code can also be downloaded from the 900-00008 product page. {{ ServoContinuousRotation.spin Turn Parallax Continuous Rotation Servo clockwise full speed for 21 sec. hold still 2 sec, and then counterclockwise full speed for 2 sec. }} _clkmode = xtal1 + pll16x ' System clock →...
- Page 8 Version 2.2: added Voltage and RPM note on p age 6. Added Usin g a Separate Power Supply on a HomeWork Board section beginning on page 2. Updated specifications. Copyright © Parallax Inc. Parallax Continuous Rotation Servo (#900-00008) v2.2 10/24/2011 Page 8 of 8...
- Page 9 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Parallax 900-00008...