Bar pantograph 9

This 3D copying mechanism is based on “Reproducing a planar trajectory 3a” shown in Brown bar pivots in the vertical plan. Red tracer of the brown bar moves on yellow sample and blue spherical milling cutter creates 3D surface on the pink work. Length of blue bars: a b. Here b = a Length of green bars: a Length of violet bars: b Reducing copy ratio: i = a/(a b) = 1/2 Length of orange bar: x Length of pink bar: y Distance between two fixed pivots of the blue bars: z Condition