Power HD Continuous Rotation Servo AR-3606HB
The AR-3606HB is a standard-sized servo that has been built by Power HD specifically for continuous rotation. At 6 V, it has a maximum rotation speed of 71 RPM (no-load) and can produce up to 93 oz-in (6.7 kg-cm) of torque. It features two ball bearings on the output shaft for reduced friction, and it offers easy access to the rest-point adjustment potentiometer. 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 actuator for beginner robotics projects.
The AR-3606HB 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 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 12″ (300 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 also sometimes goes by the Power HD part number AR3606HB, is compatible with our servo controllers and has a Futaba-compatible output shaft, which means it works with our servo wheels and sprockets. 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 standard servo 6001HB, which has almost the same size, weight, speed, and torque as the AR-3606HB.
Note that, as with most hobby servos, stalling or back-driving this servo can damage it.
Continuous rotation servo comparison
Continuous rotation servo size comparison. From left to right: SpringRC SM-S4303R, Power HD AR-3606HB, FEETECH FS5106R, Parallax Feedback 360°, Parallax (Futaba S148), and FEETECH FS90R.
|6 V||4.8 V||Weight (g)||Size (mm)||Digital?||Feedback?||Price|
|SpringRC SM-S4303R||54||71||43||46||41||41.3 × 20.7 × 40.2||$12.95|
|PowerHD AR-3606HB||71||93||62||83||40||40.5 × 20.0 × 38.0||$14.95|
|FEETECH FS5106R||95||83||78||70||39||40.8 × 20.1 × 38.0||$13.95|
|Parallax Feedback 360°||140||35||–||–||41||40.0 × 20.0 × 37.2||$27.99|
|Parallax (Futaba S148)||50||38||40||30||43||40.5 × 20.0 × 36.1||$13.95|
|FEETECH FT90R||170||21||135||18||9||22.9 × 12.1 × 26.5||$7.95|
|FEETECH FS90R||130||21||100||18||9||23.2 × 12.5 × 22.0||$4.95|