Recent Blogs
Watt Straight-Line Linkage: Animation and Path Calculator | FIRGELLI
Explore a Watt four-bar, vary link lengths and input sweep, and compare approximate straight-line travel with the actual sampled lateral deviation.
Chebyshev Plantigrade Machine: How This Walking Linkage Works, Parts, Formula, and Uses Explained
Explore four Chebyshev linkages driving two alternating foot frames. Calculate foot sweep, lift and the small height variation along the approximately level stance path.
Hoeken Straight-Line Example: Animation and Path Calculator | FIRGELLI
Scale a defined Hoeken four-bar and compare travel, sampled deviation and crank period. See the approximately straight working interval and curved return.
Chebyshev Linkage: Double-Rocker Motion and Coupler-Midpoint Path
Explore a Chebyshev double-rocker linkage. Adjust four link lengths and compare sampled horizontal span and vertical variation of the coupler midpoint.
Chebyshev Approximate Straight-Line Linkage: Exact Four-Bar Closure
Quadrangular rectilinear motion explained — how a four-bar linkage produces straight-line output, with formulas, tolerances, and real packaging-line examples.