DOBOT MG400

MG400 is Dobot's desktop-class industrial arm, launched in Shenzhen on 22 December 2020 together with the CR3, CR10 and CR16 cobots. At that launch Jerry Liu, the company's founder and chief executive, framed it explicitly as a generational move: five years after the DOBOT Magician pioneered desktop robotic arms for education and hobby use, the MG400 was to take the same compact philosophy into real production cells. The headline claim - a footprint smaller than a sheet of A4 paper - holds up against the datasheet: the base measures 190 x 190 mm, against 210 x 297 mm for A4. The mechanism is a four-axis parallel-link arm rather than the six-axis geometry of Dobot's CR and CRA families. J1 swings +/-160 degrees, J2 covers -25 to 85 degrees, J3 covers -25 to 105 degrees, and the tool axis J4 rotates freely. All four joints are rated at 300 deg/s, which is roughly 50% faster than the joint speeds Dobot quotes for its six-axis CRA arms, and the trade is precision: +/-0.05 mm repeatability here against +/-0.02 mm on the collaborative range. Dobot credits a servo motor with a high-precision encoder plus its own drive and controller for that figure, and claims its vibration-suppression algorithm cuts residual vibration by 70% and improves multi-joint settling time by 60%. Two details in the manufacturer's own published record deserve recording. First, the model number and the reach do not agree: the arm is called MG400, the December 2020 press release describes a 400 mm reach, and every product datasheet since at least March 2023 states a working radius of 440 mm. Second, the tool axis has quietly grown. The datasheet archived in March 2023 gives J4 a range of +/-180 degrees; the current page gives +/-360 degrees, with no note of a revision. This catalogue publishes the current figures and flags the change rather than presenting one number as if it had always been true. The rest is straightforward: 8 kg of arm with the controller built in, 100-240 V mains, 48 V rated, 150 W consumption, TCP/IP and Modbus TCP, desktop mounting only, 0-40 C operating range. Programming is by drag-to-teach, a graphical Blockly-style editor or Lua scripting under DobotStudio Pro, and the arm is also supported in ROS. Dobot does not publish a list price; the MG400 is sold through its distributor network and third-party marketplaces.

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Dobot's smallest industrial arm is named after a reach it does not have — and its wrist has quietly doubled

9/11/2026 · Dobot / Internet Archive

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