The Rostock mini is a delta 3D printer based on the modified design of the original Rostock created by Johann. The printer is designed to have a smaller build volume allowing for a smaller, more compact, portable, and desktop friendly version of the delta RepRap design. Using OpenSCAD, the parametric nature of the design files allows for print surfaces to be configured that range from as small as the default 152x152 mm (6x6 inches) all the way to 300x300 mm (12x12 inches) or more. Further, construction parameters such as the length of the drive belts, diagonal rods, and a laser cuttable frame as well as the firmware parameters such as diagonal rod length and delta radius are all automatically calculated based on the size of the specified print surface.
As of October 11, 2012 this wiki is actively being edited so details and information will be changing over the next few weeks.
The modifications to this design were driven by three factors: to experiment with the delta configuration in a printer with a smaller physical footprint; to determine if the original Rostock design could be made more rigid (and thereby not need the heavy wood frame) if the vertical height was reduced considerably; and finally to design a sleeker, parametric lower and upper frame suitable for laser cutting in wood or acrylic.
While this design can be enlarged to fit an 8x8 or larger printbed, the vertical build height should be limited to maybe 8" to keep the frame rigid. Conversely, because of the torque needed to move the hotend platform, NEMA17 steppers are required making it difficult to scale any smaller than the Rostock mini default of a 6x6 printbed.
- Build volume: 152x152x192 mm (6x6x7.5 inches).
- Footprint: TBD.
- Print surface: 152x152 mm heated glass which never moves.
To see the how the Rostock mini is assembled, refer to the OpenSCAD file shown at the right.