Sarrus Linkage Mark III

thingiverse

This is the next step in my attempt to make a Sarrus linkage based 3D printer. The idea is to have a cartesian mechanism without those long rods and bearings. I built three of the Mark III and mounted them in a x-y arrangement as shown. They can move over a square about 105 mm wide, and someday may carry an extruder. They are driven by DC motors taken from inkjet printers. These motors are driven in a servo arrangement using quadrature optical encoders and optical strips removed from the same printers. Instructions Print: 2 end pieces 2 armatures 3 spine pieces 6 hinge plate type a 6 hinge plate type b 1 motor plate (modify to fit your motor) 1 belt plate 1 pulley plate 1 opto plate 1 DB9 bracket Do a lot more stuff (details available upon request) like trimming, drilling out holes, etc. Mount either a stepper motor with belt (not shown) Make three of these things and connect them as shown.