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Pack of 6 Dynamixel MX-28R servomotors
Pack of 6 Dynamixel MX-28R servomotors

Pack of 6 Dynamixel MX-28R servomotors

Robotis | A-000000-02759

This pack of 6 Dynamixel MX-28R servo motors is just the right choice for conceiving a mobile robot or any other project drawing on Dynamixel’s expertise: a servo including a gear system, a driver and a controller. The MX-28R is an efficiently designed servo with high performance actuators and communicating via an RS485 interface.

€1,210.80
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Dynamixel MX-28R servo motor: the twin brother of the 28T, with an extra RS485 interface

With its case in aluminium and engineering plastic and high quality metal gears, the Dynamixel MX-28R servomotor is nearly identical to the MX-28T. Like all servos in the newest Dynamixel generation, it is equipped with a driver, a gear system and a controller. It is also fitted with a contact-less absolute encoder, and offers the highest baud rate. What’s more, the MX-28R servo from Robotis embeds a programmable feedback system.

The only difference with the 28T is the RS485 multi-drop bus, the MX-28T using the half-duplex, asynchronous, serial communication protocol.

Warning ! This box contains only 6 actuators without the traditional accessories: screws, frames and horns. Only bare actuators are supplied in the box.

Endless programming possibilities

The controllers in this new generation of Robotis Dynamixel servos can be programmed using RoboPlus, but also in C. We’ve provided an MX-28R compatible SDK in the resources below.

Technical specifications of the MX-28R servo

  • Weight: 72g
  • Dimensions: 35.6 x 50.6 x 35.5 mm
  • Reduction ratio: 193: 1
  • Stall torque (N.m): 2.3 @ 10V; 2.5 @ 12V; 3.1 @ 14.8V
  • Stall current (A): 1.3 @ 10V; 1.4 @ 12V; 1.7 @ 14.8V
  • No-load speed (RPM ): 50 @ 10V; 55 @ 12V; 67 @ 14.8V
  • Maxon motor
  • Min. operating angle: ~0.088° x 4,096
  • Operating range:
  • Actuator mode: 360°
  • Follow-up mode:
  • Operating voltage: 10 to 14.8V (recommended: 12V)
  • Operating temperature: -5°C to 80°C
  • Control signal: digital packets
  • Communication protocol: RS485 (asynchronous serial communication: 8 bit, 1 stop, no parity)
  • Connection: RS485 multi-drop bus
  • 254 IDs (0–253)
  • Com speed: 8,000 bps ~ 4.5 Mbps
  • Feedback: position, temperature, load, input voltage, etc.
  • Engineering plastic body
  • Metal gears
  • Position sensor: AMS contact-less absolute encoder
  • Default position: ID#1 – 57,600 bps

Resources for the 902-0068-000 actuator

Assemble and program your MX-28R servo in no time: we’ve gathered all the information you’ll need below.

Data sheet
Serie
MX
Tension de fonctionnement [V]
10 - 14.8 V
Couple de décrochage [N-m]
2 - 2.9
Courant de décrochage [A]
1 - 1.4 A
Vitesse à vide [rpm]
50 - 59
Protocole de communication
RS485
    My Dynamixel servomotor is not detected, what can I do about it ?

    Check that your Dynamixel servomotor is correctly configured. Do not hesitate to re-flash it with the ROBOTIS Software Roboplus. After re-flash remember to re-configure it. If the issue is not solved, contact us for an advanced support.

    My motor works but it seems like there is an offset. Why ?

    The motor is probably not well mounted. Check that you correctly mounted the horns by respecting the mark.

    My Dynamixel servomotor seems blocked. I can't turn it even when it is not alimented.

    There is probably a mechanical issue with the Dynamixel servomotor. You can directly contact us to get more advance support.

    My Dynamixel servomotor is not working properly.

    Check your power supply and the system cabling (try with a different servomotor). You can also reset the servo. If nothing works, the best solution is to go through the Dynamixel servomotor checklist!

    What is the difference between Protocol 1.0 and Protocol 2.0?

    The 1.0 protocol is specific to the Dynamixel AX and MX series. Protocol 2.0 has been developed with the new X series and Dynamixel Pro. Protocol 2.0 control tables include PID controls for extremely precise adjustment of servo movements. The firmware of the MX series servos can be upgraded to use protocol 2.0. You can refer to the protocol 1.0 and protocol 2.0 pages for more information.

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