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SF006PRO Servo
This servo is a small and reliable actuator that operates on 4–6V, offering smooth movement and up to 180° of control. It provides good torque, fast response, and low power consumption, making it suitable for robotics, mechanisms, and general hobby projects. Its standard 3-pin PWM interface makes it easy to connect to microcontrollers such as Arduino or Raspberry Pi.
How a Servo Works
A typical servo consists of several internal components:
Case
Output shaft
Gear system
Potentiometer
DC motor
Control (embedded) board
The microcontroller sends PWM control signals to the servo through the signal pin. The control board interprets the signal and drives the DC motor, which rotates the gear system. After passing through the gear reduction system, the shaft turns with increased torque.
The output shaft is mechanically connected to the potentiometer. As the shaft rotates, the potentiometer changes its voltage output. The control board reads this feedback to determine the current position, adjusting the motor’s rotation until the shaft reaches and holds the target angle.
PWM Control
The rotation angle of the servo is determined by the width of the PWM pulse. The servo normally expects one pulse every 20 ms.
Typical pulse behavior:
1.5 ms → Neutral position (about 90°)
< 1.5 ms → Moves counterclockwise from center
> 1.5 ms → Moves clockwise from center
Most hobby servos accept pulse widths between 0.5 ms and 2.5 ms, corresponding to their full movement range.
Parameters
Parameter |
Specification |
|---|---|
Operating Voltage |
DC 4V–6V (Rated 5V, recommended to use 5V supply) |
Standby Current |
≤ 5 mA |
No-Load Current |
≤ 350 mA at 5V (manually measured peak) |
Stall Current |
≤ 1.2 A at 5V (drops to ≤250 mA after 5 seconds stall) |
Rated Torque |
0.75 kgf·cm (at 5V) |
Maximum Dynamic Load |
≥ 2.2 kgf·cm (at 5V) |
Stall Torque (Static) |
≥ 5 kgf·cm (tested with torque meter) |
No-Load Speed |
≤ 0.17 sec/60° (at 5V) |
Operating Travel Angle |
90° ±10° (1000–2000 μs) |
Maximum Operating Angle |
180° ±10° (500–2500 μs) |
Mechanical Limit Angle |
360° |
Pulse Width Range |
500 μs ~ 2500 μs |
Neutral Position |
1500 μs |
Dead Band Width |
≤ 6 μs |
Backlash |
≤ 0.5° |
Weight |
13.5 ± 0.5 g |
Gear Material |
Plastic + Metal hybrid gears |
Motor Type |
Iron core motor |
Potentiometer Type |
Carbon-film, angle 220°, ≥100,000 cycles |
Cable |
250 ±5 mm, 3-pin JR connector (Brown–Red–Orange) |
Connector Pinout |
Orange: PWM Signal Red: VCC Brown: GND |
Communication Interface |
PWM Signal Voltage: HIGH 2.0–5.0V / LOW 0.0–0.6V Frame Rate: 3–30 ms (Default 20 ms) Pulse Range: 500–2500 μs |
Dimension
