RDrive servo by Rozum Robotics is an all-in-one robotic joint. RDrive servomotor unites in a single housing all the main elements: an encoder, a controller, a harmonic gear and an AC brushless motor. Since the controller is integrated into the robotic actuator, the RDrive is a DC servomotor with a brushless AC core.

The first RDrive servo motor was created to drive Rozum Robotics collaborative robot that we designed and built completely in house. We were disappointed with the quality of cheap Asian robotic joints and were unwilling to pay for expensive customization in Europe. The factors motivated us to take it upon ourselves to design and create our own robotic actuator.

Most robotic joints manufacturers produce a housed brushless robotic actuator coupled with an encoder. They call it a servomotor. Powered by DC current, the servomotor is controlled with the help of an external servo controller kit (sometimes called robotic servo drive or robotic actuator). In case you need a gear motor kit, you connect a gearhead to the servomotor. The overall design is whatever but not a compact servo motor in this case.

PERFORMANCE DATA
Rated Power: 65 W
Rated rotation speed: 55 rpm
Supply Voltage: 48 V
RMS Current: 1,16 A
Operating temperature: -10 …+35 °C
Rated Torque: 11 Nm
Peak Torque: 28 Nm
RMS Peak Current: 4,5 A

MECHANICAL DATA
Gearmotor Inertia: 0,022 kgcm²
Static Friction: 0,05 Nm
Weight: 0,6 kg
IP Rating: IP21

GEARHEAD DATA
Gearhead Type: Harmonic
Gearhead Ratio: 100
Gearhead Backlash: 0,3 arcmin

DIMENSIONS
Length (L): 85 mm
Max Diameter (D): 53 mm
Hollow Shaft Diameter (d): 9 mm
Interface: CANopen
API: C/C++/Java/Python

Parameter Name	Parameter Value
AC/DC	three-phase DC
Type	synchronous
Voltage (V)	48 - 48
Configuration	hollow-shaft
Applications	with built-in encoder
Other characteristics	CANopen high-torque low-inertia high-precision with gearbox integrated-drive
Power (W)	65 - 65
Torque (Nm)	11 - 11
Rotational speed (rpm)	55 - 55
Diameter (mm)	53 - 53