Woodstock Delta Printer

thingiverse

I've been designing and building derivative Rostock Delta printers based on Johann's excellent design for several years now. My current version, which features magnetic ball joint arms, is derived from the original Johann Rostock as well as several other designs posted here on Thingiverse. Check out this Youtube video of it in action: https://youtu.be/jT24ClLlQKo This design utilizes a direct drive extruder, the Titan by E3D. When I first saw this product, I knew that this geared extruder with a pancake stepper motor was exactly what I needed to ditch the bowden extruder and mount it directly on the end effector. The entire effector, including the extruder drive and E3D hotend, weighs in at under 300 grams. Since I've modified many of these parts, I thought it would be helpful to gather them up in one place to assist others in building their own Woodstock Delta Printer! While the base structure is exactly like the original Johann Rostock, with 8mm smooth rods placed in pairs 60mm apart and using 250mm diagonal rods, the frame is a bit shorter. I took the wood panel laser cut design from http://www.thingiverse.com/thing:34570 by Docmooney. Even though Docmooney posted his DXF drawings of the wood panels with two thicknesses shown in the names, I used 12mm (1/2" nominal) baltic birch plywood for all of the pieces. They consist of a base panel, a top panel, two sides, and a short front center base support piece, five pieces in total. By using laser cut plywood, an extremely precise and square frame can be made, which is crucial in building a successful delta printer. Besides the frame, 3D printed parts make up the rest of the dimensionally important build. We have three vertical towers: X, Y, and Z, each having two smooth 8mm steel rods held in place by three fixed printed parts. These are the lower stepper motor holder, the upper endstop holder, and the topmost boxed idler bearing block with 608zz skate bearings for the GT2 drive belt. I used Johann's original design for the stepper motor holder and upper endstop. My design uses six 30-inch (762mm) hardened steel 8mm rods which extend above the top panel of the wood frame. These extensions are used to hold the boxed idler, which performs two functions: Mounting the idler allows it to be easily accessed for maintenance or replacement. The idler also provides a means of tensioning the GT2 belt. Just add the normal assortment of stepper motors, GT2 belts, GT2-20 tooth drive gears, heated bed (260mm Alu-MK3 bed), the Titan Extruder, E3D hotend, 12V 30A power supply, and off you go! I'll be adding more photos and a complete parts list as soon as I can. Let me know what you think! Update 3-10-2017: Just uploaded a new version of the E3D Titan extruder mount. This one has holes in the name and includes all necessary mounting holes. It also features a hex-shaped recess on the side for attaching two M3 nuts, one to clamp down the mount and the second threaded on higher to hold the tensioning string. Printer Settings: Printer: Woodstock Rostock Delta Printer Rafts: No Supports: No Resolution: 0.2mm Infill: 35% Notes: The Magnetic Carriage needs support for printing. It goes between the two sections of GT2 belt grooving to make a belt coupler.