CrankPin:Four-Bar Linkage Tool

CrankPin is a dedicated engineering tool for the synthesis and kinematic analysis of four-bar linkages. It allows users to design, simulate, and evaluate mechanical motion through a data-driven interface.
Key Features & Functionality:
• Linkage Synthesis: Input specific lengths for the Crank, Coupler, Rocker, and Ground links. The app automatically calculates the Grashof Condition to identify the mechanism type (Crank-Rocker, Double-Rocker, Drag Link, etc.).
• Real-Time Simulation: Visualize the mechanism in motion with a smooth animation engine. Adjust simulation speeds to observe complex mechanical transitions.
• Live Kinematic Metrics: An integrated Heads-Up Display (HUD) provides real-time tracking of the Crank Angle (θ) and the precise Cartesian (X, Y) coordinates of the joint pins (A and B) during rotation.
• Velocity Vector Solver: Perform velocity analysis by defining input angular velocities. Calculate the Quick-Return Ratio (QRR) and evaluate the efficiency of the forward and return strokes.
• Transmission Angle Analysis: Monitor the Transmission Angle (γ) and Mechanical Advantage in real-time to ensure your design avoids "dead-center" positions and functions reliably.
• Coupler Curve Tracing: Trace the geometric path of any point on the coupler link. The app provides path analytics, including total path length and point-by-point data tracing.
• Mechanism Library: Save your custom configurations to a local library. Browse, load, or delete saved designs to manage multiple engineering iterations.
Who is this app for? CrankPin is designed for mechanical engineering students studying kinematics, machine designers performing rapid synthesis, and hobbyists interested in mechanical linkages.