Ord Bot Z-Axis Conversion to Belt Drive

thingiverse

Experience issues with lead screws causing motor grinding and sync problems prompted a switch to belt-drive Z-axis in an ord bot. The new setup runs smoothly, but the gantry falls when motors are unpowered; hence, a flip-out rest is required. STL and SCAD files are available for download. Motors attach to aluminum angle with original holes, while belt clamps fit z-lift block holes, possibly requiring drilling from the gantry plate. Advantages of belt-driven Z-axis include fast response for max Z endstop homing, better autoleveling, zero wobble, and reduced noise due to no lubrication needed. Images showcasing a large 20-hour print with good layer quality at 0.2 mm layer height are posted. A mashup of thingiverse model and current motor bracket accommodates Misumi recommendation by blah_59. Videos of first tests and prints are shared. Attention should be given to hooking up Z-axis motors separately and reversed, as improper wiring caused a driver to fry. An updated version incorporates a counterbalance pulley system using sinkers and fishing line, crediting whosawhatsis for printed idler pulleys. Motor bracket versions suit Misumi ord bots and other models with varying gantry protrusion, requiring standard or extended idler versions. Needed components include 4-6 x 4mmx8mm screws, 4-6 x 4mm T slot nuts, 6 x 4mm washers, 2 x 4mm x 40 mm screws, 6 x 4mm bearings (or two with printed pulleys), 2 x 6mm GT2 belt, 2 x GT2 20 tooth pulleys, 4 x 1/8" or 3mm rods for locking belt loops in clamp, and 4 x 5mmx12mm screws with nuts (additional two for gantry plates).