RIG-Arm · Kaka

Desktop Interactive Robotic Arm

Quick Start Guide

From algorithms to living entities · Start your desktop cyber evolution

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Quick Start Guide

Disclaimer

Each electronic kit from our store is inspected for appearance and basic functionality before shipping. Please power it on and test it as soon as you receive it and confirm that it works properly before mounting it on the frame. Our store accepts no responsibility for damage caused by installing the kit without testing it first, or by improper installation or unsuitable operating conditions after installation. Damage resulting from failure to test the kit is not covered by after-sales service.

ℹ️ Factory firmware notice: Electronic kits are shipped without preinstalled firmware. After assembly, you must flash the firmware yourself before the robot can operate. Fully assembled robots come with firmware preinstalled and are ready to use out of the box.

For firmware flashing, refer to Stage 3 of the Wiki build guide: Firmware Flashing (Bringing Your Robot to Life). Flashing platform: https://tools.luwudynamics.ai/

Connect the device: Connect the mainboard to your computer using a USB data cable, connect the battery, and turn on the power switch.
Select the series: On the platform home page, click the RIG Series card, select your model, and flash the firmware.

RIG-Arm Firmware Flashing Demo

Shows how to select RIG-Arm and its firmware on the flashing platform, then flash the device.

Press play to watch. You can pause, seek, or enter full screen at any time.

Electronic kit: View the Wiki build guide

RIG-Arm Assembly Guide (Updated)

Follow the updated assembly tutorial to build your RIG-Arm.

Play the video to follow the assembly tutorial. If the player does not load, watch on YouTube.

Power On/Off & Charging

To ensure the best first experience, we recommend fully charging the battery first. During charging, you can check the battery level via the power indicator; when fully charged, the power indicator turns green.

ActionFunction

Single tapTouch button

Double tapControl power indicator

Long pressSwitch

Calibration Mode

In daily use, long-press the touch button or say the voice command "Enter Calibration Mode / Exit Calibration Mode" to freely toggle calibration state. On first power-up, the kit enters calibration mode automatically and releases servo resistance; as shown, manually adjust all joints to the standard upright posture, then tap the touch button to save the mechanical zero point.

RIG-Arm Calibration Demo

Follow the video to position the arm joints and calibrate the robot. Use the standard upright posture illustration above as a reference.

Press play to watch. You can pause, seek, or enter full screen at any time.

Teach Mode

RIG-Arm voice teach mode three steps:

Say "Enter Teach Mode": the arm auto-homes, servos unlock, and you can drag joints to record motion (up to 15s per take, auto-exit on timeout);
Say "End Teach": the arm resets to the initial posture and the recorded track auto-saves;
Say "Replay Teach": replay the saved track, unlimited repeats.

Connect RIG-Arm

After power-up, follow the steps below to connect your RIG-Arm:

Download the Luwubot app: for iPhone, search for "Luwubot" in the App Store and install it; for Android, search for "Luwubot" in Google Play and install it.
Open the app and follow the in-app instructions to complete network pairing.
After pairing, the arm auto-stands upright; by default it sways slightly, use the voice commands "stop moving" or "be quiet" to stop it.

Select & Configure WiFi

Select a 2.4G network from the WiFi list (note: 5G is not supported yet), manually enter the password and tap "Start Pairing".

Cyber Soul Development

Connect your Kaka and witness its evolution from machine to "cyber life".

Agent Setup

Through the "Xiaolu Classmate" mini program, customize its personality, dialogue style and voice.

Mood & Growth

During daily interactions, view Kaka's "Five-Dimension Personality" panel to witness its evolution.

Mood Diary

It auto-generates an exclusive mood diary based on interaction frequency and content.

Interactive Commands

After boot and online, wake the robot with the wake word "Xiaolu Classmate". Try these command words!

Nod Shy Act Cute Head Tilt Bow Stretch Play Dead Wag Tail Apologize

Notice: Only in Teach/Calibration mode after servo torque-release are joints allowed to be adjusted manually.

FAQ

Before inspecting or reconnecting ribbon cables or servo cables, turn off the robot and disconnect the power supply. Do not connect or disconnect cables while power is on. Hardware revisions may differ; follow the connector labels on your device and the guide for your model.

The kit screen is blank and the robot seems not to start. What should I do?

If the power indicator is on but firmware has never been installed, flash the firmware for RIG-Arm first.

Electronic kits ship without firmware; fully assembled robots have firmware preinstalled. Follow the flashing instructions at the beginning of this manual. If firmware is already installed, a blank screen alone does not mean firmware is missing.

If the power indicator is also off, check the battery charge, connections, and power switch first. If the screen remains blank after flashing, disconnect the power and check whether the display ribbon cable is reversed or loose. On RIG-Arm, the exposed gold contacts should face down; insert the cable straight and fully into the connector.

Open the official firmware flashing platform

The servos do not move after startup and seem to have no power. What should I check?

Turn off the robot and disconnect the power first. Check whether any servo cable is reversed or loose.

Align the raised tab on the cable connector with the matching opening on the servo socket. Make sure each connection is correctly oriented and firmly seated, then check the battery and fully charge it before testing.

If a servo resists movement but cannot turn, disconnect the power and check for protruding servo horn screws or mechanical interference. Do not keep the robot running by manually pushing the servos.

Firmware flashing fails, or my computer cannot find the serial port. What should I do?

Make sure the robot is powered on and use a USB-C cable that supports data transfer.

A charging-only cable cannot be used for flashing. Open the flashing platform in Chrome or Edge, select the firmware for RIG-Arm, and allow the browser to access the selected serial port.

If the device is still not detected, check whether the serial port permission dialog was blocked. If your hardware uses a CH340 serial chip, check its driver; for other interfaces, use the driver required by your actual hardware.

Explore the English RIG Wiki