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Parallax (Futaba S148) Continuous Rotation Servo #900-00008

The Parallax continuous rotation servo is a Futaba S148 servo that has been modified for continuous rotation. Since servos have their own integrated control circuitry, this unit gives you an easy way to get your robot moving. Key specs at 6 V: 50 RPM (no-load), 38 oz-in (2.7 kg-cm), 43 g

Not currently available

Our Code: SKU-002379

Supplier Link: [Pololu MPN:536]

Description

Parallax (Futaba S148) continuous rotation servo (1)

Overview

The Parallax (Futaba S148) continuous rotation servo converts standard RC servo position pulses into continuous rotation speed. It can be controlled directly by a microcontroller without any additional electronics, which makes it a great actuator for robotics projects. The servo includes an adjustable potentiometer that can be used to centre the servo and comes with a star-shaped servo horn and an 11″ (270 mm) lead.

Specs

  • Power: 4.8 – 6 V
  • Top 6 V speed: 50 RPM (with no load)
  • Torque: 2.7 kg-cm/38 oz-in at 6 V
  • Weight: 43 g/1.5 oz with servo horn and screw
  • Size (L x W x H): 40.5 mm x 20.0 mm x 38.0 mm / 1.60" x 0.8" x 1.50"
  • Control interface: RC servo pulse width control, 1.50 ms neutral
  • Manual adjustment port

This servo is compatible with our servo controllers and our servo wheels and sprockets.

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 torque@ 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

Specifications

Dimensions

Size: 40.5 × 20.0 × 38.0 mm
Weight: 43 g

General specifications

Digital?: N
Speed @ 6V: 0.22 sec/60°1
Stall torque @ 6V: 3.0 kg·cm
Speed @ 4.8V: 0.28 sec/60°
Stall torque @ 4.8V: 2.4 kg·cm
Lead length: 270 mm
Hardware included?: Y

Notes:

1
About 50 RPM.

Resources

FAQs

What are the three wires coming out of my servo?

Pololu - Common RC servo connectors. From left to right: Futaba, JR, Airtronics Z

Most standard radio control servos (and all RC servos we sell) have three wires, each a different colour. Usually, they are either black, red, and white, or they are brown, red, and orange/yellow:

  • brown or black = ground (GND, battery negative terminal)
  • red = servo power (Vservo, battery positive terminal)
  • orange, yellow, white, or blue = servo control signal line

Please check the specs for your servo to determine the proper power supply voltage, and please take care to plug the servo into your device in the proper orientation (plugging it in backwards could break the servo or your device).