Rostock
Release status: working
| Description | Rostock is a delta robot 3D printer prototype.
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Rostock is a delta robot 3D printer prototype, built in 2012 by Johann in Seattle, USA.
Contents
Design Goals
- Build volume: 200x200x400 mm (8x8x16 inches)
- Footprint: 300x350 mm (12x14 inches)
- Print surface: 200x200 mm heated glass which never moves
- Mass of end effector with hotend: less than 50 grams
- Positioning speed: up to 800 mm/s in all 3 directions
- Positioning accuracy: at least 30 steps/mm in all 3 directions
- Simplicity: fewer than 200 parts
- Hardware cost: less than $500 USD
Bill of Materials
See #Links for full BOM spreadsheet with vendors.
- Stepper motors: 4x NEMA 17 (3 positioning, 1 extruder)
- Timing belt: 3x 1524 mm GT2 belt (2 mm pitch)
- Ball bearings: 6x 608 (skateboard bearings)
- Linear bearings: 6x LM8UU
- Smooth rod: 6x 762x8 mm
- Plastic parts: printed from PLA on Prusa Mendel
- Fasteners: stainless steel, mostly M3 (some M4 and M8)
- Hotend: MakerGear hotend for 1.75 mm filament, 0.5 mm nozzle
- Filament drive: Airtripper's direct drive extruder
- Top and bottom frame: hand-cut plywood (300x350 mm baltic birch)
Future
The following improvements are planned for future versions:
- Remove bottom endstops because the top endstops are already micro-adjustable.
- Enable high-speed lift (Z motion) during retraction for travel moves.
- Use smaller timing belt pulleys and idler bearings.
- Use open end timing belt instead of requiring closed loops.
- Create a Mini Rostock variation with 120x120x120 mm build volume.
- Use OpenBeam aluminum extrusion instead of plywood frame.
- Use OpenRail (or hybrid roller slide directly on OpenBeam) instead of LM8UU and smooth rods.
- Experiment with dual extruders.
