Jul.14, 2012

Thingiverse user Johann is working on a new delta robot 3D printer prototype called Rostock. The closest design is Helium Frog Delta Robot which controlled by an Arduino Mega Controller and uses Pololu stepper motor drivers. Johann's Rostock 3D printer is 30 inches (77 cm) tall, and the build volume is 8x8x16 inches (20x20x40 cm). It uses 6 of diagonal rods that use universal joints and are fully printable. The print speed can be up to 400 mm/s in all three directions.

The Rostock 3D printer is designed to drive the plastic filament through a tube to the hot end where it is melted. The motor is not mounted remotely so it reduces the weight of the printing head. The print surface is 8x8 inches heated glass which never moves. All these can really help to step up the speed.

The design goals of Rostock are:

  • Footprint: 12x14 inches
  • Mass of end effector with two hotends: less than 150g
  • Positioning speed: 800 mm/s in all 3 directions
  • Positioning accuracy: at least 30 steps/mm in all 3 directions
  • Simplicity: fewer than 200 parts (not including washers, nuts and SMD-mounted electronics)
  • Hardware cost: less than $500 USD

(plastic parts / credit: Johann)

With much less parts and faster speed possibility, this design could revolutionize extrusion based 3D printing at home. Rostock is still a prototype and not ready for production. If you want to build a prototype to experiment and improve the design, you can find all the info on thingiverse.

Watch the videos below the Rostock in action.


Source: Deltabot via Hackaday


Posted in 3D Printers



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jeff wrote at 10/16/2013 4:35:45 PM:

It's not a grinder JB, I don't understand your 45 degree comment. The resulting print is layer by layer.... The head remains completely vertical.

skm wrote at 7/29/2012 8:16:21 PM:

I'm interested in building one of these with a larger build area in x-y directions. Does anyone know how to calculate the arm lengths and height of rods to scale this up to, say, 12 x 12 for example? Do you set the arm lengths in the marlin software \? Is` there a place online to learn about the kinematics of a straight-rod style delta robot? most of what I have seen uses pivoting 2-section arms instead of z axis sliding rods.

Bill P. wrote at 7/20/2012 6:23:05 PM:

Sample print of the cup looks like it has a better print finish than any other home 3D printer. What is the positioning accuracy and will smaller drive pulleys trade speed for accuracy? Any plans to market kits?

enf644 wrote at 7/15/2012 11:03:11 AM:

Amazing design!

JB wrote at 7/15/2012 12:31:54 AM:

What would be really cool is if it could be configured to angle the head and print along the inside or outside of a surface, not just in horizontal planes, thereby eliminating 45-degree angle limitations.

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