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FEETECH FS90R Micro Continuous Rotation Servo

SKU: POLOLU-2820

$6.92 AUD, inc GST
$6.29 AUD, exc GST

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FEETECH FS90R Micro Continuous Rotation Servo
6.92 AUD

SKU: POLOLU-2820

$6.92 AUD, inc GST
$6.29 AUD, exc GST
3 reviews 0 5 5
In stock, with a short lead time. 462 units dispatch in 4 to 9 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Wed, 1st of Nov with Express Post within Australia.
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Bottom view of FEETECH FS90R micro continuous rotation servo showing middle-point adjustment potentiometer.

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.

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 slotted screwdriver to turn the middle-point positioner. 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 7″ (180 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 (Fitec) FS90, is compatible with Pololu's 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 Power HD micro servo HD-1900A, which has almost the same weight, speed, and torque as the FS90R.

Continuous rotation servo comparison

Continuous rotation servo size comparison. From left to right: SpringRC SM-S4303R, Power HD AR-3606HB, Parallax, and FEETECH FS90R.
SpringRC SM-S4303R PowerHD AR-3606HB Parallax (Futaba S148) FEETECH FS90R
Max Speed @ 6 V: 54 RPM 71 RPM 50 RPM 130 RPM
Stall torque @ 6 V: 71 oz-in 93 oz-in 42 oz-in 21 oz-in
Max Speed @ 4.8 V: 43 RPM 62 RPM 39 RPM 100 RPM
Stall [email protected] 4.8 V: 46 oz-in 83 oz-in 33 oz-in 18 oz-in
Weight: 41 g 40 g 43 g 9 g
Size (mm): 41.3×20.7×40.2 40.5×20.0×38.0 40.5×20.0×38.0 23.2×12.5×22
Price: $12.95 $14.95 $13.95 $4.95

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Documentation and Resources:

Product Comments


Customer Reviews

  1. Review by Dale verified purchaser
    Rating
    100

    Worked as expected. I am using two of them to drive tracks on a robot and they are quite strong, fast little servos. (Posted on 11/08/2017)

  2. Review by Tom verified purchaser
    Rating
    100

    Easy to use, a bit noisy for quiet applications. Good range of accessories for connection to moving parts. (Posted on 31/10/2016)

  3. Review by Brett verified purchaser
    Rating
    100

    Great little micro servo for the price, can be a bit noisy but that is expected with the plastic gears. (Posted on 13/10/2016)

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.32 for Express Post (1-2 days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address:

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Please checkout our customer service page if you have other frequently asked questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.