Rostock Mini Pro

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Rostock_Mini_Pro Documentation
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Rostock Mini Pro

Release status: working

Rostock Mini Pro.jpg
Rostock mini is a portable delta robot 3D printer designed by Brian Evans based upon Johann's original.
CAD Models
External Link

Rostock Mini is a delta 3D Printer originally designed by Bwevans, with smaller build volume compared to a Rostock or Kossel, but much more compact, portable, and desktop friendly. 3dprinterczar improved Rostock mini with carbon fibre arms, Traxxas 5347 u-joints, and a planetary gearbox extruder. The top and bottom plates are made from 6mm acrylic sheet to give strong support of the entire frame. This is a complete kit that contains everything (including tools) to build a Rosotck Mini Pro. The mechanical part can be finished between 3-6 hours depending on your experience with RepRap machines.

Technical Details

  • Build Volume: 18cm x 18cm x 25cm cylinder
  • Heatbed: No (PLA is the recommmended filament).
  • Extruder: Bowden extruder



  • Any RepRap controller supporting 4 steppers and an extruder (RAMPS, Melzi, Rambo, etc.).
  • 12V 10A laptop power charger
  • Nema 17 motors with 0.55 N*m torque x 3
  • Nema 17 motor coupled with a planetary gearbox
  • J-head MKIV hotend


What are the advantages of having a Delta styled RepRap ?
Delta RepRap such as Rostock Mini can print very fast due to the unique mechanical structure. It’s easier to assemble and more professional-looking than traditional Cartesian RepRaps. It’s also very fun to watch the Rostock Mini Pro print.
What are Traxxas 5347 u-joints?
Traxxas 5347 u-joints are mostly used in airplane models to give smooth movements. These are ball-socket joints that create very little friction when your Rostock Mini Pro’s arms move.
Why carbon fibre arms?
It’s super strong, light, and cool.
What about the Software?
You can use standard open-source software such as Repetier-host to control the Rostock Mini Pro.
What is a planetary gearbox coupled Nema 17 motor?
This is a Nema 17 motor with a built-in gearbox to increase output force. Traditional RepRaps use a printed gearbox structure (such as in Greg’s extruder) to achieve the same end; however, planetary gearbox is much more precise and more reliable as well.