Pantograph Router with Proxxon 50EF Setup and calibration - YouTube
Pantograph - Milescraft
Building the pantograph
Homemade 3D Router Pantograph - HomemadeTools.net
3D Pantograph : 11 Steps - Instructables
3-D router pantograph
The first commercially available all-metal Router Pantograph. Make mortise and tenon joints super quick and easy; very unique. Higher-res photo and info in comments [975x717] : r/toolporn