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The FT90R is a digital micro servo that has been built by FEETECH specifically for continuous rotation, offering an inexpensive and easy way to get your small turret spinning or miniature robot moving, especially when paired with 60×8mm wheels designed specifically for this servo.
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The FT90R is a micro-sized digital servo that has been built by FEETECH (formerly known as Fitec) specifically for continuous rotation. At 6 V, it has a maximum rotation speed of around 170 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 is set precisely to 1.5 ms with a deadband width of ±20 µs. 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. The following picture shows an example of the hardware that might be included (actual hardware could vary).
This robotics servo, which is a continuous rotation version of the FEETECH FS90, is compatible with our servo controllers. If you are looking for a similar servo that is capable of limited-range position control as opposed to continuous rotation speed control, consider the FS90, which has identical dimensions and uses the same motor, or the Power HD micro servo HD-1900A, which has almost the same weight, speed, and torque as the FS90.
Note that, as with most hobby servos, stalling or back-driving this servo can damage it.
If you want to use this servo as an actuator for your miniature robot, you will need a wheel to go with it. Fortunately, we carry a 60×8 mm wheel specifically designed for use with this servo.
The wheel size is well matched to the servo’s speed and torque, allowing for a top speed of around 40 cm/s (1.3 ft/s) at 6 V.
Size: | 22.9 × 12.1 × 26.5 mm |
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Weight: | 9 g |
Digital?: | Y |
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Free-run current @ 6V: | 120 mA |
Stall current @ 6V: | 800 mA1 |
Speed @ 6V: | 170 rpm |
Stall torque @ 6V: | 21 oz·in1 |
Speed @ 4.8V: | 135 rpm |
Stall torque @ 4.8V: | 18 oz·in1 |
Lead length: | 10 in |
Hardware included?: | Y |
Data sheet
The FS90R is a micro servo that has been built by FEETECH (formerly known as Fitec) specifically for continuous rotation, offering an inexpensive and easy way to get your small turret spinning or miniature robot moving, especially when paired with our 60×8mm wheels designed specifically for this servo. Pololu 2820
The FS90 analog servo from FEETECH is a great general-purpose micro servo at a great price. Servo horns and associated hardware are included.
Key specs at 6 V: 0.10 sec/60°, 21 oz-in (1.5 kg-cm), 9.0 g.
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No product available!
The FS90R is a micro servo that has been built by FEETECH (formerly known as Fitec) specifically for continuous rotation, offering an inexpensive and easy way to get your small turret spinning or miniature robot moving, especially when paired with our 60×8mm wheels designed specifically for this servo. Pololu 2820
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No product available!
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This is the most mini servo. Only weights 9 gram and gives you a 1.6kg.cm torque. Pretty strong regarding its size. Suitable for Beam type robot. SER0006
The FT90R is a digital micro servo that has been built by FEETECH specifically for continuous rotation, offering an inexpensive and easy way to get your small turret spinning or miniature robot moving, especially when paired with 60×8mm wheels designed specifically for this servo.