Wlkata Robot Arms: A Comprehensive User Guide

WLKATA robot arms are desktop-scale robotic arms built for hands-on robotics education, prototyping, AI vision projects, and automation training. This guide explains how the three arm families differ (Mirobot, MT4, and Haro380), how the software path grows from Blockly to ROS 2, which accessories turn one arm into a working cell, and how to set up and run an arm safely.

Which WLKATA robot arm is right for you?

Choose the Mirobot if your curriculum centers on kinematics: its 6+1 axes mirror full industrial cobots and it carries the broadest software and curriculum support. Choose the MT4 if you teach mechanical engineering, precision, or Arduino integration: its 4+1 palletizing layout keeps the end effector pointing down, and the CNC metal frame is designed to be taken apart and rebuilt. Choose the Haro380 when a program needs sub-0.1 mm repeatability, harmonic-drive joints, or PLC integration.

Repeatability (how consistently the arm returns to the same point) is the spec that separates the tiers. Coursework and demonstrations do not need industrial precision; research or repeatable fixture work does. Many programs run both a Mirobot and an MT4 because the software ecosystem is shared.

Mirobot: the 6-axis classroom standard

The Mirobot is the broadest education choice. It supports lessons on joint control, Cartesian movement, end-effector operation, pick-and-place, and basic automation sequencing, and WLKATA sizes the Education Kit for one student or a pair. End effectors swap in about 30 seconds with thumb screws: parallel gripper, suction cup with pump, and pen holder are standard, and a laser engraver, 3D-printer extruder, and small CNC spindle are optional tools sold separately.

RoboticsSelect lists three kits built on the same arm. The Mirobot Education Kit includes the arm, control box, end-effector kit, a basic conveyor, and a student textbook. The Professional Kit adds a Bluetooth wireless teach pendant and a pneumatic gripper set with university textbooks. The Advanced Kit tops the line with an AI voice-control box and an electromagnetic gripper on top of the full end-effector set.

MT4: the rebuildable metal arm

The MT4 is the stronger choice when the learning outcome includes mechanical understanding. Its frame is 100 percent CNC metal and is designed to be disassembled and reassembled with the included hex tool, so students learn robot mechanics by rebuilding the arm itself. It still arrives fully assembled. The controller is an Arduino Mega 2560 paired with an ESP32-based extender box, with USB, serial, RS485, Bluetooth, Wi-Fi, and PLC connectivity, and the joints use silent stepping motors with reducers.

The MT4 Edu Kit ships with the control box and extender box, a servo gripper and tools, the hex tool, WLKATA Studio and BlockFactory software, and a free illustrated 200-plus page student textbook with a teacher guidebook. It is the lowest-priced arm kit in the range. The MT4 Advanced Kit adds soft grippers, a pneumatic set, and an AI voice-control box for voice and LLM control projects.

Haro380: industrial-grade precision on a desktop

The Haro380 is aimed at users who want the feel of an industrial robot in a compact format. Harmonic drives at each joint eliminate backlash, which is the main source of repeatability loss in stepper-driven arms, and the arm is rated at 0.05 mm repeatability with a 500 g payload and 434 mm reach under lab-grade conditions. It supports PLC automation along with RS485, Modbus, EtherCAT, and TCP Socket protocols, runs from WLKATA Lab (Windows) rather than WLKATA Studio, and adds a C++ SDK to the Python API. It includes overload and overheat protection, but it is not a safety-rated collaborative robot, so standard lab practices apply.

RoboticsSelect lists two kits. The Haro380 Core Kit includes the arm, the AI Assistant Voice Control Box, an emergency stop switch, and a starter set of end effectors (two-finger soft gripper, electric gripper, and suction cup). The Advanced Kit adds an extended end-effector collection (soft-beak gripper, three- and four-finger soft grippers, two- and four-finger suction cups, and a pneumatic parallel gripper) plus educational accessories. Tools attach through a magnetic docking interface or screw on. Unlike the MT4, the Haro380 is not designed for disassembly; unauthorized disassembly voids the warranty.

How does the software path grow with students?

WLKATA supports a staged path, so one platform can serve a middle-school elective and a university robotics course:

1. Blockly and teach-and-play in WLKATA Studio. Learners jog each joint, record positions, and open and close end effectors. WLKATA Studio runs on Windows (XP and later) and Ubuntu, with a no-install Windows build for locked-down school PCs.
2. Python and G-code. The wlkatapython SDK sends G-code over serial from Python 3.9 or later, and programs can be downloaded to the extender box and run offline without a PC.
3. Simulation with MATLAB and CoppeliaSim. WLKATA's developer resources cover MATLAB and CoppeliaSim co-simulation, and the standalone Mirobot MATLAB textbook assumes R2023b or later with the Robotics System Toolbox.
4. ROS and ROS 2. WLKATA publishes ROS 1 packages with MoveIt, RViz, and Gazebo, and ROS 2 packages tested on Ubuntu 22.04 (Humble) and 24.04 (Jazzy) with MoveIt 2. Haro380 development targets ROS 2.
5. AI vision and multimodal control. The AI Vision Set brings OpenMV machine vision, and the AI-HUB kits add vision, voice, and gesture control on the xFactory Brain compute module, with an Arduino layer for real-time hardware lessons.

Mac and Chromebook classrooms typically work through Python, ROS, or browser-based interfaces, and ROS coursework assumes a Linux machine. Schools with mixed fleets often standardize on Windows desktops for the arm software.

Which accessories extend the arm?

A standalone arm teaches motion; an expanded cell teaches flow, timing, sensing, and coordination. These add-ons are listed at RoboticsSelect:

• Conveyor Belt Set: a motorized belt with a photoelectric sensor and adjustable speed (about 2,400 mm/min over 0.59 m of travel), run from the arm's own software. Fits the Mirobot, MT4, and Haro380.
• Sliding Rail Set: a motorized linear seventh axis that extends the workspace by 500 mm and is controlled as the arm's seventh axis in WLKATA Studio or WLKATA Lab.
• AGV Rover Set: an omnidirectional mecanum-wheel base with a 10 kg payload and a 12 V 6000 mAh battery, for mobile manipulation lessons on hard, flat indoor floors. The arm is sold separately.
• AI Vision Set: an OpenMV 3 camera with a 640 by 480 color sensor on a CNC stand with a light ring, calibration board, wooden blocks, and a digital textbook covering color sorting, shape sorting, and shape reorientation with a Mirobot.
• AI-HUB AI Development Kit and AI Navigation Learning Kit: applied AI on the xFactory Brain, with a 20-chapter AI textbook and a project-based multimodal textbook respectively. Both work offline.
• Mini T-slot Starter Kit: 8 by 8, 10 by 10, and 15 by 15 mm aluminum profiles for building a custom table-mount frame.
• Mirobot Textbook MATLAB and Mirobot Textbook ROS2: standalone textbooks that extend the platform into specific university courses.

Beyond single arms, WLKATA builds complete cells and lines from the same components: the Fruit Picking Cell, AI Automatic Sorting Cell, Automobile Assembly Cell, Logistic Warehouse Cell, AI Automatic Sorting Line, Automobile Assembly Line, and Engraved Souvenirs Manufacturing Line. Browse them under Training Cells and Production Lines, and see the WLKATA kit comparison for a side-by-side table of every arm kit.

How do you set up and run a WLKATA arm safely?

A first session follows the same arc on every kit: fasten the arm to its base plate or bench, connect the supplied power adapter (12 V 5 A for the Mirobot) and the USB or ribbon cable, install the CH340 driver and WLKATA Studio (WLKATA Lab for the Haro380), press the power button on the base, and click Homing. WLKATA requires homing at every power-up, after any emergency stop and RESET, and whenever the software is reopened. Then jog joint by joint with a small step and low speed before anyone writes a program.

Keep the full reach clear: 315 mm for a Mirobot, 359 mm for an MT4, and 434 mm for a Haro380. Carry a Mirobot by the lower arm and base, never the upper arm, and never twist its joint 1 or joint 3 by hand, which WLKATA says destroys the gears. Nobody reaches into the movement range while the arm runs, the arm is switched off when the lesson ends, and any laser tool runs with the eye protection and cover WLKATA's manual calls for.

Plan one kit per one to two students: a class of 20 rotating through stations typically needs 4 to 8 kits, not 20. Schools and universities can order with formal purchase orders, and the robotic kits buying guide covers budgeting by program level.

The takeaway

WLKATA robot arms are best understood as one modular ecosystem: the Mirobot gives learners an accessible 6-axis platform, the MT4 adds rebuildable mechanical depth, and the Haro380 raises the ceiling for precision and PLC work. Add conveyors, rails, vision, mobility, textbooks, and training cells, and the same product family supports a first robotics lesson through a working smart-factory lab. Start with the WLKATA collection.