~~NOTOC~~
===== Kühling&Kühling RepRap Industrial 3D Printer (Prototype) =====

At the beginning of 2013 Kühling&Kühling demonstrated a pre-production prototype of the RepRap Industrial at [[http://fabcon-germany.de|FabCon.3D]] tradeshow in Erfurt/Germany and started to accept pre-orders on the final series production model.

This revision was not actually manufactured, so these pages are for historical reference only.

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Kühling&Kühling RepRap Industrial 

|  **Durable ABS prints without warping.\\ 
 Heated build chamber.\\
 Dual extruder printhead.\\
 Super easy maintenance workflow.**  |

 

This is our RepRap-based desktop 3D printer that can reliably print objects from **ABS plastic without warping** – a problem well known from many desktop-grade 3D printers and RepRap designs.

The “Kühling&Kühling RepRap Industrial” has a fully enclosed frame with powerful recirculating **chamber heaters** that raise the ambient air temperature up to 70°C. With minimized thermal stress the printed objects adhere flat to the build platform and allow for dimensionally accurate results.

Featuring **two extruders** this 3D printer can print with different nozzle diameters – printing the visible outer shell of an object in fine details while saving production time on the infill structure by using a bigger extrusion nozzle. Or you can do pretty two-color prints from equal tips.

The whole machine was **developed for productivity**, so you can expect minimal maintenance time for several recurring tasks like swapping filament, changing nozzle tips or levelling the build base. All sub-assemblies are easily accessible so you get the job done quickly.

[{{:reprap-industrial-v0:img_5642.jpg?270|Front view}}]
[{{:reprap-industrial-v0:img_5645.jpg?270|Front view - doors open}}]
[{{:reprap-industrial-v0:img_5710-e1360769746642.jpg?270|Side view}}]
<WRAP clear></WRAP>
[{{:reprap-industrial-v0:img_5690.jpg?270|HxWxL: 80x55x55 cm}}]
[{{:reprap-industrial-v0:img_5705.jpg?270|Top view
}}]
[{{:reprap-industrial-v0:img_5704.jpg?270|Doors open}}]
<WRAP clear></WRAP>
[{{:reprap-industrial-v0:img_5711.jpg?270|Spool holders on the back – plus cable mania..}}]
[{{:reprap-industrial-v0:img_5742-e1360770252568.jpg?270|Back view - cable harness waiting for new high power MOSFET driver boards to be finally wired up}}]
[{{:reprap-industrial-v0:img_5716.jpg?270|Front view}}]
<WRAP clear></WRAP>
[{{:reprap-industrial-v0:img_5713.jpg?270|One of four circulating air heatings - each providing 120W for 70°C chamber temperature}}]
[{{:reprap-industrial-v0:img_5723.jpg?270|Active carbon air filter}}]
[{{:reprap-industrial-v0:img_5717.jpg?270|FR4 print surface}}]
<WRAP clear></WRAP>
[{{:reprap-industrial-v0:img_5720.jpg?270|Print bed, bottom view - semi-automatic 3 point bed leveling system}}]
[{{:reprap-industrial-v0:img_5733-e1360770100995.jpg?270|Dual extruders, front view - water cooled hotend insulators}}]
[{{:reprap-industrial-v0:img_5740-e1360770176217.jpg?270|Dual extruders, back view - water cooled planetary geared stepper motors}}]
<WRAP clear></WRAP>
[{{:reprap-industrial-v0:img_5736.jpg?270|Advanced custom cnc'd direct drive extruder gears}}]
[{{:reprap-industrial-v0:img_5724-e1360769811579.jpg?270|Front left Y end with belt idler}}]
[{{:reprap-industrial-v0:img_5730-e1360770014921.jpg?270|Left X end with stepper motor and hall-o endstop}}]
<WRAP clear></WRAP>
[{{:reprap-industrial-v0:img_5726-e1360769880639.jpg?270|Y stepper motor}}]
[{{:reprap-industrial-v0:img_5729-e1360769956503.jpg?270|Z stepper motor with Sugru spider coupling}}]


==== Specifications ====

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

  * Specifically aimed at printing ABS with zero warping, low maintenance effort through highly accessible sub assemblies
  * 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
  * Fully parametric Open Source design
  * Dual extruders, primarily for use with different nozzle diameters for perimeters/infill to save printing time on big objects
  * 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
  * 12 mm precision ground shafts with LM12UU linear ball bearings on all axes (will be replaced by Igus RJMP, see below)
  * Tool-free belt tensioning with built-in thumbwheels
  * Direct-drive extruders with high torque geared stepper motors
  * Permanent printbed material (polyetherimide (PEI) glass fabric composite) – 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
  * All-metal hot ends from reprap-fab.org with 40 W each for short heat up time
  * Raspberry Pi with a 10″ capacitive touch display for ethernet enabled standalone operation
  * Touch optimized user interface for the raspberry pi is in development
  * Magnetic door locks
==== Upcoming development ====
  * 400 mm x 400 mm x 400 mm super-sized printer based on our extremely parametric design

==== Open Source ====

The development version of our OpenSCAD source files are available on GitHub at https://github.com/kuehlingkuehling/RepRap-Industrial-200. A Bill of Material as well as build instructions and details on electronics and wiring will be published as we lock down v1.0 and sales start.