Robot Joint PCB

2026-08-11



Key Features

  • Joint-level servo control

  • Encoder, torque and temperature acquisition

  • Distributed CAN or EtherCAT networking

  • Compact high-density mechanical integration


Typical Electronic Components

MCU; motor-driver stage; encoder IC; torque/force interface; IMU; temperature sensors; DC-DC conversion; compact connectors.


Reference PCB and PCBA Parameters

Reference item

Typical guidance

Typical layers

6-12 layers

Construction

Rigid, flex or rigid-flex

Density

HDI, microvias and via-in-pad frequently considered

Copper

Mixed signal and local high-current requirements

Protection

Conformal coating where environment requires

Testing

Joint simulator, communication and thermal test


Manufacturing and Engineering Priorities

  • Co-design PCB outline, fasteners, shaft clearance and cable movement.

  • Evaluate vibration, shock, repeated flexing and connector retention.

  • Separate motor phase paths from encoder and torque-sensor signals.

  • Provide a realistic heat path from enclosed power devices to the joint housing.


Design and Commercial Cautions

  • Circular or irregular boards can reduce available routing and panel utilization.

  • Rigid-flex bend zones must exclude vias, sharp copper transitions and unsuitable stiffeners.

  • Validate serviceability and replacement access.


Applications

Collaborative robots, robot dogs and humanoid shoulders, elbows, wrists, hips, knees and ankles.

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