Dynamixel MX-28T Servomotor

Dynamixel Servomotors

Dynamixel Range Overview

Dynamixel servomotors are integrated servomotors that include:

• A reducer
• A controller
• A pilot

Dynamixel servomotors have a unique identifier and communicate via digital packets.

The main features of the Dynamixel range are:

• A large . (1024 divisions pour les modèles AX, RX et EX, 4096 pour les MX)
• Many on the various physical variables of the servomotor (current position, speed, voltage, internal temperature, etc.).
• A alert based on internal temperature, torque, or supply voltage, which is activated when these values exceed defined limits. The Dynamixel servomotor provides feedback and can automatically correct the situation.
• ” Compliant Guide ": Controls the amount of spring force in position control.
• Establishment of the couple : Torque can be set to 1023 steps from maximum torque to free rotation.
• Operation low current/high voltage : It is highly efficient because it operates at a higher voltage. The performance of the robotic system is also improved by the low current consumption.
• A Status LED Is used to display the status of Dynamixel.
• A mechanical assembly facilitated by the large number of compatible mechanical parts.
• A easy wiring via 'daisy chain'

Dynamixel servomotor programming.

Servomotors must be connected to a controller ( CM-700 , CM-5 , CM-510 o CM-530 ) as a control. The programs are made with RoboPlus, very easily and without requiring much prior knowledge.

Newer controllers support the embedded C language, and a Software Development Kit (SDK) is available for developing custom applications.

The Dynamixel MX-28T Servomotor

The Dynamixel MX-28 has been introduced in two new models: the MX-28T, which maintains an asynchronous half-duplex serial communication protocol and a TTL Multi Drop physical link, while the MX-28R communicates using the RS485 protocol and an RS485 Multi Drop bus.

The MX series of Dynamixel servo motors boasts new features such as advanced PID control functions, 360-degree position control, and high-speed communication.

Technical specifications of the Dynamixel MX-28T servo motor.

• MCU : ST CORTEX-M3 ( ST32F103C8 @ 72MHZ,32BIT)
• Position sensor: Absolute non-contact encoder (12BIT, 360 degrees)
• Stall torque : 2.3N.m (à 11.1V, 1.3A), 2.5N.m (à 12V, 1.4A), 3.1N.m (à 14.8V, 1.7A)
• No-load speed : 54 rmp (12V)
• Resolution : 0.088° x 4.096
• Range of motion : 360°
• Protocol : Half duplex asynchronous serial communication (8bit, 1stop, No Parity)
• Connection (physical) : TTL Multi Drop
• Communication speed : 8000bps ~ 3Mbps
• Weight: 72g Voltage : 10~14.8V (Suggested voltage 12V)
• Transmission ratio : 193 : 1
• ID : 254 ID (0~253)
• Feedback : Position, Temperature, Charge, Input Voltage, etc.
• Standby power consumption : 100 mA

Servomotors differ according to the type of communication (the MX series offers both types of communication).