Feb.20, 2013

There is a new RepRap in town! Kiel-based Kühling&Kühling from Germany published first details on their new RepRap design after a full year of development.

Founded by mechatronics engineering students Jonas Kühling and Simon Kühling in 2012, Kühling&Kühling has a goal: to build high productivity open-source 3D printer that requires minimal maintenance.

Named "Kühling&Kühling RepRap Industrial", the 3D printer has a fully enclosed frame with powerful recirculating chamber heaters that raise the ambient air temperature up to 70°C. It features two extruders that allows 3D printer to print with different nozzle diameters. One is for printing the visible outer shell of an object in fine details and another, for saving production time, can be used for printing infill structure by using a bigger extrusion nozzle. You can also just use it for two-color printing.


  • Filament diameter: 3mm
  • Build volume: 200mm x 200mm x 200mm
  • Number of extruders: 2
  • Overall dimensions: 800mm x 600mm x 600mm


  • printing ABS with zero warping
  • Rigid frame made of t-slot aluminium extrusion
  • Fully enclosed by acrylic and wood, doors on the front
  • A heated chamber capable of 65-70°C recirculating air temperature
  • Heated PCB print bed
  • Water cooled hot-ends and extruder steppers to ensure reliable extrusion in high ambient air temperature
  • Activated-carbon air filter to remove unpleasant smell of molten plastic
  • Semi-automatic print bed levelling makes calibrating the machine a matter of seconds
  • Z-leadscrew bearing supported on both ends, sugru spider coupling for absolutely wobble-free operation
  • Tool-free belt tensioning with built-in thumbwheels
  • Direct-drive extruders with high torque geared stepper motors
  • Permanent printbed material (FR4) – no Kapton or PET tape needed
  • Adjustable nozzle height to align both extruders on the same level
  • Custom designed, precision extruder drive gears to provide enough grip on the filament in a heated enviroment
  • Integrated LED lighting


This open source 3D printer is built from scratch in order to build in all desired features. Further improvement includes Raspberry Pi with a 10″ capacitive touch display for ethernet enabled standalone operation, touch optimized user interface for the raspberry pi and magnetic door locks.

Watch the Kühling&Kühling RepRap Industrial 3D printer in action in the time lapse video below:

As there is plenty overhang and no plain bottom surface the part required a good amount of printed support structure.

This is what the final part looked like after removing the break-away support:

(All images credit: Kühling&Kühling)

Still not launched, but this new 3D printer has raised a lot of interests. Check out Kühling&Kühling website for more high resolution photos and detailed information.







Posted in 3D Printers


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Charles wrote at 4/17/2013 4:40:15 AM:

a start up company with solid based partners looking to get funding for start up. Where is the best starting point?

Perry Engel (aka cerberus333) wrote at 3/28/2013 7:56:31 PM:

The heated bed is intended for making sure ABS adheres to the print bed. The enclosure is intended for the purpose of preventing ambient air and breezes from cooling the printed article unevenly. The side effect of having a slightly heated enclosed area would be hard for stratysys to prosecute as a infringement. if there was a small heater which was exclusivly for heating the air, they would have a better case. Of course they could sue makerbot, but i doubt it would win.

Adam B wrote at 2/24/2013 6:24:35 PM:

the makerbot rep2x has a heated chamber of sorts as well. and I'm trying to figure out how they avoid patent lawsuits. they've enclosed the chamber on the 2x with clear plexi and the heatbed is a heating device raising the ambient temperature. and makerbot is in the us...

Josiah wrote at 2/21/2013 4:59:38 AM:

They are in Germany. US Patents don't matter until they come to the US I believe.

Aaron wrote at 2/20/2013 5:28:30 PM:

They should read the wired article about patents, at least for the part on the heated chamber. http://www.wired.com/design/2013/02/3-d-printing-patents/?pid=1994&viewall=true

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