A classroom-friendly rig that showcases the motion possibilities of a six-bar linkage—dwell, quick-return, complex path generation, and motion conversion beyond a four-bar. The kit assembles as Watt-type or Stephenson-type six-bar chains (1-DOF) using modular links and precision revolute joints. Drive it by hand crank or low-speed motor and trace coupler paths on paper or log angles with an encoder/Arduino.

Parts Used:

1. Base & Ground Plates: Rigid aluminum/MDF base with hole grid/slots for variable pivots
2. Link Set (modular): Assorted aluminum links with multiple hole centers; two ternary links for six-bar chains
3. Joints: 7–8 precision revolute joints (bushings/shoulder bolts, low play), spacers & circlips
4. Drive: Hand crank or 12 V DC gearmotor with speed control (0–60 rpm)
5. Measurement: Protractor scale, pointer arm, optional magnetic/optical encoder on input, angle stickers on rockers
6. Path Tracing: Pen holder on coupler, paper plate/board for locus plotting
7. Data & Control (optional): Arduino/ESP32, OLED display, USB logging cable
8. Hardware: Fasteners, standoffs, link length gauges, Allen keys, thread-locker
9. Safety: Finger guards on moving loops, non-slip feet