Rostock (delta robot 3D printer)

thingiverse

The Rostock is a delta robot 3D printer prototype that boasts an array of design goals, including a build volume of 8x8x16 inches or 200x200x400mm, a footprint of 12x14 inches, a print surface of 8x8 inches heated glass, and a mass of the end effector with two hotends at less than 150g. It also promises positioning speed of 800 mm/s in all three directions and positioning accuracy of at least 30 steps/mm in all three directions. The printer aims for simplicity with fewer than 200 parts (excluding washers, nuts, and SMD-mounted electronics) and a hardware cost of less than $500 USD. It takes inspiration from YouTube videos featuring "flexpicker" or "adept quattro," and its closest ancestor can be found at http://www.heliumfrog.net63.net/deltarobot/delta.html. Documentation for the Rostock can be found on Reprap.org/wiki, while separate thing uploads on Thingiverse make it easier to post specific instructions, comments, and derivatives. The latest release of Rostock fixes bugs in idler_end.stl, motor_end.stl, and joint.stl files. Printing regular G-code with PLA at 50 mm/s for perimeters, 100 mm/s for infill, and 500 mm/s for travel moves is recommended, along with Airtripper's direct drive bowden extruder with MK7 drive gear and NEMA 17 stepper motor, Teflon PFA tubing (2mm inside, 4mm outside diameter), and a Makergear hotend with 0.5 mm nozzle. The printer uses modified Marlin firmware for real-time delta geometry available on GitHub. Key components include four NEMA 17 stepper motors, three GT2 belts (2mm pitch, 762 teeth), Airtripper's bowden extruder filament drive(s), six 762x8mm smooth rods, hand-cut plywood (300x350mm baltic birch) for the top and bottom frame, stainless steel fasteners (mainly M3, with some M4 and M8), and a MakerGear 1.75mm hotend with a 0.5mm nozzle.