Hiwonder xArm 1S 6-DOF Intelligent Bus Servo Robotic Arm Kit Unassembled

specifications

• Product: xArm 1S
• Degrees of Freedom: 6DOF (5DOF + gripper)
• Dimensions: 154 × 140 × 426 mm
• Weight: About 0.9 kg
• Material: Aluminum alloy
• Power supply: 7.5V 6A DC adapter
• Servo configuration: 1× LX-225 + 4× LX-15D + 1× No.1 bus servo
• Control: PC, mobile app, wireless PS2 controller, mouse
• Communication: Bluetooth and USB
• Programming: Manual/offline programming, PC software, mobile app, Arduino/serial secondary development
• Feedback: Position, voltage and temperature feedback on the documented intelligent bus servos
• Package weight: About 2.2 kg
• Package: Available as unassembled 

Unlock New Capabilities

• Past Projects (Prerequisites) If you've already experimented with basic 4-DOF acrylic robot arms or standard PWM servo sweep projects using an Arduino, you already understand the fundamentals of joint movement — which means you're perfectly ready to graduate to a professional-grade intelligent bus servo system.
• Feature Upgrade (What This Unlocks) This xArm 1S kit unlocks advanced automation tasks like industrial pick-and-place simulations, precise inverse kinematics programming in Python, and reliable, repeatable trajectory recording using action groups. These are builds you simply cannot achieve reliably with standard hobby servos that lack position and voltage feedback.
• Effort Level: Intermediate

Minimum hardware to get started:

• Windows PC, Mac, or Smartphone — to interface with the provided software or mobile app for programming, calibrating, and controlling the arm.
• Assembly Tools (Standard Screwdriver) — to assemble the precision aluminum brackets and mount the servos securely.
• 7.5V 6A Power Adapter (included in kit) — to provide sufficient current for all 6 heavy-duty intelligent bus servos simultaneously without voltage sag.

Included in the Box:

• 1× Robotic Arm Brackets with Servo Horns
• 1× LX-225 Intelligent Serial Bus Servo
• 4× LX-15D Intelligent Serial Bus Servos
• 1× No.1 Intelligent Bus Servo
• 1× xArm 1S Bus Servo Controller
• 1× 7.5V 6A DC Power Adapter
• 1× PS2 Wireless Handle Controller
• 1× Handle Control Receiver
• 1× USB Cable
• 1× Screwdriver

Frequently Asked Questions

• Is the xArm 1S compatible with Arduino?
  Yes, you can use an Arduino Uno to send serial commands to the arm's core controller, though it requires an additional sensor shield for easiest integration.
• Can I control the arm using a Raspberry Pi?
  Yes, a Raspberry Pi can interface with the arm controller via USB or serial using Python to trigger pre-programmed action groups or direct movements.
• Does the xArm 1S work with Mac OS?
  The official Hiwonder PC software is primarily designed for Windows, but you can control the arm via Bluetooth using the iOS/Android app if a Windows PC is unavailable.
• Can I use standard PWM hobby servos as replacements?
  No, the arm specifically requires Hiwonder LX series serial bus servos; standard 3-wire PWM servos will not work with the controller or bracket design.
• What voltage does the xArm 1S require?
  The entire system runs on a 7.5V DC power supply, which is provided by the included power adapter.
• Can I power the arm directly from my computer's USB port?
  No, USB only provides 5V and limited current; you must use the included 7.5V 6A adapter to power the heavy-duty servos.
• How much current does the robotic arm draw?
  When all 6 servos are moving simultaneously under load, the arm can draw up to 6 Amps, which is why a robust power adapter is included.
• How do I connect the servos to the controller?
  The intelligent bus servos are daisy-chained; you connect the first servo to the controller, the second to the first, and so on, drastically reducing wiring clutter.
• Where do I plug in the wireless PS2 controller receiver?
  The arm core controller has a dedicated, clearly labeled port for the PS2 receiver to plug in directly.
• Do I need to solder anything to assemble the kit?
  No, the entire kit is assembled using the included screws, nuts, and plug-and-play servo cables.
• Which programming languages can I use with the xArm 1S?
  You can program the arm using Scratch (visual block programming), Python, or the dedicated Hiwonder PC software.
• Where can I find the Python SDK for this arm?
  The Python resources and communication protocols are available on the Hiwonder official website under the xArm 1S support section.
• Do I have to write code to make the arm move?
  No, you can use the PC software to physically pose the arm, record the positions, and save them as action groups without writing a single line of code.
• Why is the robotic arm jittering when trying to hold a position?
  This usually indicates a power supply issue; ensure the 7.5V 6A adapter is securely connected and not sharing power with other heavy loads.
• Why does the arm not match the positions I set in the software?
  The servos may not have been centered during physical assembly; you must calibrate all servos to their neutral position before tightening the metal horns.
• Why is the PC software not detecting the arm?
  Check that the arm is powered on via the DC adapter, the USB cable is data-capable (not just for charging), and the correct COM port is selected in the software.