A Sixty-Gram Mobile Robot Controller With Its Own Gyro

Oriental Motor released the MVC01 on 14 September, a mobile robot controller for AMRs and AGVs that pairs with the company's BLV Series R Type brushless DC motors and drivers.

The specification that stands out is physical: 75 by 65 by 24.2 mm, with a mass of only 60 g before cabling. That is 5 mm thinner and half the mass of the previous BLV series controller. Power is standard 24 to 48 V DC, communication is RS-485, and the company makes a point of using no proprietary connectors or cables.

Inside is an inertial measurement unit doing gyroscopic odometry, supplemented by motor encoder data, with heading changes calculated on the module itself. The controller outputs forward and rotational speed commands and supports lateral speed commands for Mecanum-wheel robots. It can run as a self-navigating module, a line-tracing module or a manual drive module, and is configured through MVC Studio on a PC using a step-by-step wizard.

Control.com's write-up links the configuration approach to a reduction in ROS nodes, and to the consequences of node sprawl: slower and less predictable motion, and harder troubleshooting.

That is the real argument for the product. Most AMR builders solve odometry in ROS on the vehicle PC, where scheduling jitter and a growing node graph blur a control loop that ought to be tight. Moving gyro-fused odometry and the kinematics onto a 60 gram module leaves the application processor to do planning, and puts reasonable dead reckoning within reach of small logistics vehicles that were never going to carry a good IMU and a decent compute budget at the same time.