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Servo Sub-Micro 0.7kg.cm Plastic Gears with Analog Feedback (Feetech FS0403)

11-00012825
FS0403-FB
CompanyFeetech Part NumberFS0403-FB
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€620
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This version of the FS0403 sub-micro servo from FEETECH is specially modified to provide access to the feedback potentiometer through a fourth (green) wire, allowing you to directly measure the position of the output. This extra information enables more complex robotics applications, such as determining when the servo has reached its target, detecting when the output is blocked, or implementing your own higher-level closed-loop position control.

The FS0403-FB is a specially modified version of FEETECH’s FS0403 sub-micro analog servo that provides access to the feedback potentiometer through a fourth (green) wire, which makes it possible to directly measure the output angle. With this extra information, you can determine when the servo has reached its target position (or detect if something is interfering with its ability to get there). This feedback also enables more complex closed-loop control of the servo from your main controller.

Like the FS0403, the FS0403-FB works with standard RC servo pulses, providing an operating angle of approximately 120° over a servo pulse range of 900 µs to 2100 µs. The feedback voltage varies linearly over this range by a couple of volts. As with most servos, the pulse range can be expanded to achieve an expanded operating angle, but the limits of this are not specified by FEETECH. (In our tests, we were able to get an expanded range of approximately 180° over a pulse range of 650 µs to 2500 µs, but as this is not part of FEETECH’s official specifications, it is possible different units will behave differently in this regard.)

The servo signal, power, and ground are provided through a 3-wire servo cable that is terminated with a standard JR-style connector, which is Futaba-compatible. The feedback is accessible through a separate green wire that is terminated like our female premium jumper wires and works with standard 0.1″ male header pins. These cables are approximately 6″ (15 cm) long.

NOTES

  • As with most hobby servos, stalling or back-driving this servo can damage it.
  • Torque:
    • 0.6kg/cm(4.8V)
    • 0.7kg/cm(6V)
  • Speed:
    • 0.09s/60°(4.8V)
    • 0.08s/60°(6V)
  • Rotate angle: 120°
  • Operating voltage: 4.8 ~ 6V
  • Gear: Plastic
  • Weight: 6g
  • Dimension: 20x8.3x19.3mm
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Company
Feetech
Gross Weight
0.009kg
Servo Standar
25T (Futaba/Feetech)
Gear Type
Plastic
Rotation
120°
Servo Operation
Analog
Servo Size
Micro
Speed (6V)
0.08sec/60°
Torque (6V)
0.7 kg.cm
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