Micro Pololu FEETECH FS90R Servomotor View larger

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Micro Pololu FEETECH FS90R Servomotor

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The FS90R is a 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 60x8mm wheels designed specifically for this servo. This servo can work with both 5 V and 3.3 V servo signals.

Key specs at 6 V: 130 RPM (no-load), 21 oz-in (1.5 kg-cm), 9 g


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Overview

The FS90R is a micro-sized 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 130 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 FS90R continuous rotation servo converts standard RC servo position pulses into continuous rotation speed. The default rest point is 1.5 ms, but this can be adjusted by using a small screwdriver to turn the middle-point adjustment potentiometer. 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):


Bottom view of FEETECH FS90R micro continuous rotation servo (V2.0) showing middle-point adjustment potentiometer.


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.


Wheels

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 compatible servo wheels for micro servos (20T, 4.8 mm spline):


60 mm and 40 mm Pololu Wheels for Micro Servo Splines on FEETECH’s FT90R and FS90R micro continuous rotation servos.


The 60x8mm wheel allows for a top speed of around 42 cm/s (1.3 ft/s) at 6 V.


Specifications

Dimensions

Size: 23.2 x 12.5 x 22 mm
Weight: 9 g


General specifications

Digital?: N
No-load current @ 6V: 120 mA
Stall current @ 6V: 800 mA1
Speed @ 6V: 130 rpm
Stall torque @ 6V: 21 oz·in1
Speed @ 4.8V: 100 rpm
Stall torque @ 4.8V: 18 oz·in1
Hardware included?: Y
Lead length: 10 in


Notes:

1 Stalling should generally be avoided as it can damage the motor and gears.


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Micro Pololu FEETECH FS90R Servomotor

Micro Pololu FEETECH FS90R Servomotor

The FS90R is a 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 60x8mm wheels designed specifically for this servo. This servo can work with both 5 V and 3.3 V servo signals.

Key specs at 6 V: 130 RPM (no-load), 21 oz-in (1.5 kg-cm), 9 g


See description for more details about the product.

Add to cart now!

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