A pantograph is a four bar linkage based on a parallelogram that scales the movement of a point by a set factor.
For the sake of simplicity, the design is non adjustable but I have included linkage files for scale factors (SF) of 2, 3, 4, and Pi.
After putting the design through some tests, I found the margin of error to be consistently under 1%.
10x M3 8mm
What to print
1x Link_2 (2x for SF of 2)
1x Link_3 (0x for SF of 2)
1x Pointer_1 (for joint closest to base)
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