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The PortaPrusa is a foldable briefcase 3d printer inspired by the design of printers like the Prusa i3 and the Mowi Printer. The goal of this printer was to create a printer that could collapse into the smallest possible volume while still maintaining an all-in-one structure, as well as being robust and aesthetically pleasing.
This printer is very much a work in progress, I'm currently working on the 3rd version.
|Laser Cut Parts||23|
|Controller Electronics||I'm using a printrboard|
|Printing Size||200 x 200 x 180|
|Motors||5 x NEMA 17 Stepper|
|Frame Material||5mm Wood|
|Frame Manufacture||Laser Cutter|
|Overall Size (Folded)||37x37x8cm|
|Overall Size (Unfolded)||37x37x37cm|
The development of the PortaPrusa is hosted on github: Link
The Repo for the PortaPrusa contains all of the STLs you need in order to make the printer. In addition, it also contains the source blend files.
The following is a list of what needs to be printed:
Laser Cut Parts
You can find the dxfs on the Github
|1||Front.dxf||The big sheet|
|1||Back.dxf||The other big sheet|
|2||Left.dxf||Side of box|
|2||Right.dxf||Side of box|
|1||Top.dxf||Top of box|
|1||Bottom.dxf||Bottom of box|
|Whole-Frame.dxf||All of it!|
|1||bedMount.dxf||Goes under heated bed|
|2||M5 nut||For Z-Drive|
|2||M4 bolt||For Pivot|
|11||LM8UU (Asia) or LME8UU (US, Europe) linear bearings OR||If using linear bearings, don't cut costs here. Cheap ones can damage the smooth rods.|
|8mmx25mm pla bushings|
|2||M4 linear bearings||These will allow the box to slide shut.|
|2||320mm 8mm smooth rod||X axis|
|2||340mm 8mm smooth rod||Y axis|
|2||350mm 8mm smooth rod||Z axis|
|2||230mm 4mm smooth rod||box slide|
|2||320mm M5 threaded rod||z drive|
|1||710mm GT2 toothed belt||Y axis|
|1||790mm GT2 toothed belt||X axis|
|2||1.5cm vinyl tubing, 6.35mm OD 4.32mm ID (3cm total)||Used to attach motors to the Z axis threaded rods. Can be found at most hardware stores, typically used in toilets to connect refill tube to outlet.|
|1||Glass surface||For print bed.|
|1||7mm 1.5cm compression spring||Used to tension extruder.|
|1||Piano Hinges||Small hinge to hold cover panel on box|
|2||Folding Leg Support Hinge||Like this one http://www.amazon.com/Brainerd-Brass-Plated-Folding-Support/dp/B00002N9TI#productDetails to hold open box.|
|2||Latches||You need to keep this thing shut somehow.|
The PortaPrusa uses 5 NEMA17 stepper motors. Two of these motors, the Z axis motors, are connected to the same stepper driver of the electronics, which are typically wired in parallel but some builders wire them in series so that each motor gets the same amps (in case the resistances are not exactly the same).
About any RepRap controller works for the PortaPrusa. Required features: 4 stepper drivers, 1 thermistor input and 1 heater output for the extruder and another thermistor/heater pair for the heated bed. Choosing the best one for your printer is mostly a matter of taste. For this build, I used a Printrboard Rev. D. You will need a compact power supply unit (PSU), like a laptop charger. Also remember that some electronics (RAMPS first and foremost) need an Arduino as well.
Included are mounts for endstops. You will need three standard limit switches.
The PortaPrusa supports a couple different extruders. Right now, these are:
The PortaPrusa will support any 200mm heated build platform. I use the Mk2 Heated Bed.