FEETECH FT90R Digital Micro Continuous Rotation Servo
Features
Digital?: Y
No-load current @ 6V: 120 mA
Stall current @ 6V: 800 mA1
Speed @ 6V: 135 rpm
Stall torque @ 6V: 21 oz·in1
Speed @ 4.8V: 108 rpm
Stall torque @ 4.8V: 18 oz·in1
Hardware included?: Y
Lead length: 10 in
Size: 22.9 x 12.1 x 26.5 mm
Weight: 9 g
Overview
The FT90R is a digital micro servo that has been built by FEETECH specifically for continuous rotation and works with both 5V and 3.3V servo signals, offering an inexpensive and easy way to get your small turret spinning or miniature robot moving, especially when paired with Pololu's 60x8mm wheels designed specifically for this servo.
At 6 V, it has a maximum rotation speed of around 135 RPM (no-load) and can produce up to 21 oz-in (1.5 kg-cm) of torque. The servo can be controlled using a direct connection to a single microcontroller I/O line without any additional electronics, which makes it a great miniature actuator for beginner robotics projects; just throw on a pair of wheels and your robot is ready to roll!
The FT90R continuous rotation servo converts standard RC servo position pulses into continuous rotation speed. The rest point (sometimes called neutral position) is set to 1.5 ms. Pulse widths above the rest point result in counterclockwise rotation, with speed increasing as the pulse width increases; pulse widths below the rest point result in clockwise rotation, with speed increasing as the pulse width decreases.
The servo has a 10" (250 mm) lead that is terminated with a JR-style connector and includes additional servo horns and mounting hardware.
Note: As with most hobby servos, stalling or back-driving this servo can damage it.
