This is the largest printer I have found. It is also the cheapest. The reason is that it is run by hand, without computer or motors or electronics. Put an object on one side and move the 3d pen while tracing the object. Move the z dimension by turning the crank on the lab jack to move the printed copy down a notch. Be creative!

Simple cartesian style CNC. Uses ACME screws for all 3 axes, 20x40 v-slots and should have 50cm x 50cm x 50cm work volume.

This is a work in progress 3D printer Dimensions are 230x230x340mm height. Print dimensions are: 135x135x160mm. Prototype has a bowden extruder with a J-head hotend. Assembly instructions: http://reprapstyle.blogspot.pt

Cartesian Printer, 200mm x 200mm x 380mm build area, enclosed, belt and pinion movement, heated bed, Raspberry Pi, Pi Cam, OctoPrint

Delta printer, Bed size 280 cm dimeter Print Height 300 cm not tested yet the speed

A work in progress. working to refine the print head/carriage to integrate a bed level probe directly into the print head.

My first custom build, using vslot rails for Z and Y and 8mm rails for X. Currently printing parts for this using my Prusa I3. The build volume will be roughly 300mm^3, X and Y are belt driven with 8mm acme lead screws for Z. Will be uploading more info shortly as i continue to build the printer.

I am building a H bot style printer so this design will not be finished any more than it is.

Proteus is the Greek God of change. Besides the numerous aspect of 3D printing that this could relate to this machine like the god can change. The Build allows for an interchanging head that will allow different functionality to be quickly and easily adapted. So you could print clay, silicon, plastic, cut with a laser cutter or even attach a rotary tool

My version of the popular Lautr3k 3D printer. UNI Panther colors of Purple and Yellow on black V-slot rails. 300x300 bed.

I creat a open source 3D Printer to print big things. Print size: 400x500x300 mm. You can download the Drawing in PDF and in Inventor 2013 format. The unwinding drawings are also included. I take some detail photos for a better understanding.

I like this design a lot. It's very stable, very strong and with the EX2 enhancements, it prints like a champ.

Rigid 3d printer with more than enough room for dual extruders. Easily expandable platform.

I am hoping to post a detailed build of my printer it is a large format using the RepRap RAMPS 1.4 & Mega 2560 & DRV8825 Driver + optical end stop +LCD 12864 -C 0.4mm Far-end Distal Dual-Head Nozzle Extruder Double Nozzle

This is the adult version of the QU-BD juvenile known as their OneUp. It not only uses extrusion framing instead of press board MDF, it is a full sized 8x8 build area w/ABS-Nylon capability. Only the OneUp's single Z axis driver concept is similar. I'm tempted to call it OneUpAdult for marketing.

T-slot, v-slot, aluminum angle make up the majority of the structure.

Custom build, after building the prusa i3 and upgrading to i3v, I wanted to build something more sturdy that can print fast and more accurate. Model is built in Fusion 360

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OpenBuilds box type printer using min-v-wheels for X & Y axis. Designed for plexiglas panel enclosure of build area.

It is a first draw of my future Printer/CNC cutter.PCB mill Still need to work more on it

Berrybot inspired delta 3d printer with a few other tweaks and modifications.

OX MultiMachine

Multi-tool 3D printer, laser cutter, and CNC mill.

Delta printer that uses printed carriages sliding on aluminium extrusions.

This is a work in progress(not printing yet). Expect this instructions to grow with time, but for now it is mainly interesting for those who want to take part in developing this printer.

I'm looking to build a large build-volume, accurate, steady 3D printer with the eventual aim of swapping in a diode laser to allow for use as a cutter for printing/cutting parts out of balsa sheet for building model aircraft.

I've made a 3D printer

Converting a ShapeOKO into a 3D printer.

As a 3rd year mechatronic engineer with a plan to print my 4th year thesis project and with no elegant backup plan, I ran into a problem, I'm gonna need a bigger printer. Loving the DeltaPrintr kickstarter, but needing it before the end of next year I have resolved to make my own.

All's good for assembly, testing coming up soon