This is my 3-D router pantograph.
Unlike other router pantographs, this pantograph also controls the
router's depth of cut. This is is achieved by tilting the whole pantograph
back and forth as the follower moves up and down. The pantograph
supports the router's weight and thus precisely controls its height.
William's Pantograph on lumberjocks.com
Router copy carver for 1:1 scale routing
Pantorouter for carving
wood joinery from templates
Plasma pantograph for cutting
intricate shapes out of metal