Pololu FEETECH FT90R Digital Micro Continuous Rotation Servo

The FT90R is a compact digital servo engineered for continuous rotation by FEETECH, formerly known as Fitec. Operating at 6 V, it achieves a rotation speed of approximately 135 RPM without load and delivers torque up to 1.5 kg-cm. This servo is easily controlled via a single microcontroller I/O line, making it an ideal choice for beginner robotics projects. Simply attach a pair of wheels, and your robot is ready to move.

This micro servo translates standard RC servo position pulses into continuous rotation speed. The neutral point is set at 1.5 ms. Pulse widths greater than this neutral point cause counterclockwise rotation, with speed increasing as the pulse width increases. Conversely, pulse widths shorter than the neutral point result in clockwise rotation, with speed increasing as the pulse width decreases.

Equipped with a 25 cm lead terminating in a JR-style connector, the servo also comes with additional servo horns and mounting hardware. The specific hardware included may vary, providing flexibility for different applications.

Compatible with Pololu's servo controllers, this digital version of the FEETECH FS90 continuous rotation servo offers versatility and ease of use. For those seeking a similar servo with limited-range position control instead of continuous rotation, the FS90 or Power HD micro servo HD-1900A are excellent alternatives, sharing similar dimensions and performance characteristics.

When incorporating this servo into a miniature robot, pairing it with a compatible wheel is essential. Pololu offers suitable servo wheels for micro servos, featuring a 21T, 4.8 mm spline. A 60×8 mm wheel can enable a top speed of approximately 42 cm/s at 6 V, providing efficient mobility for your robotic projects.

As with most hobby servos, care should be taken to avoid stalling or back-driving, as these actions can cause damage. For more detailed specifications, refer to the servo's datasheet.