PortaPrusa
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Release status: in development
| Description | A super compact foldable 3d printer.
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| License | |
| Author | |
| Contributors | |
| Based-on | |
| Categories | |
| CAD Models | |
| External Link | N/A
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Contents
Introduction
The PortaPrusa is a foldable briefcase 3d printer based heavily off of the design of the Prusa i3. 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.
Specifications
| Plastic Parts | 31 |
| Non Printed Parts | a lot |
| Cost | ? |
| Controller Electronics | Almost all RepRap |
| Printing Size | 200 x 200 x 200 |
| Motors | 5 x NEMA 17 Stepper |
| Frame Material | ?mm Wood |
| Frame Manufacture | Laser Cutter |
| Overall Size (Folded) | ? |
| Overall Size (Unfolded) | ? |
Development
The development of the PortaPrusa is hosted on github: ___
Printed Parts
The [Github repository] 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:
| Quantity | STL file | Comments | Picture |
|---|---|---|---|
| 2 | Z-Top.stl | ||
| 1 | Z-Bottom-Large.stl | Allows clearance for X-axis motor | |
| 1 | Z-Bottom-Small.stl | ||
| 1 | X-Big.stl | Holds Motor | |
| 1 | X-Small.stl | ||
| 1 | Extruder-Main.stl | ||
| 1 | Extruder-Arm.stl | ||
| 1 | Extruder-Plug.stl | Retaining plug for bearing | |
| 1 | Extruder-Clamp.stl | Clamps Belt | |
| 4 | M8-Mount.stl | Retaining block for m8 rod | |
| 4 | M4-Mount.stl | Retaining block for m4 rod | |
| 1 | Y-Motor.stl | ||
| 1 | Y-Idle.stl | ||
| 2 | Bed-Slide.stl | ||
| 1 | Bed-BeltMount.stl | Top piece of belt clamp | |
| 2 | Bed-Clamp.stl | ||
| 2 | Box-Pivot.stl | ||
| 2 | Drive-Gear.stl | ||
| 2 | Idle-Gear.stl |
Laser Cut Parts
| Quantity | Description | Comments |
|---|---|---|
| --- | ?mm Wood | --- |
| 1 | BottomPanel.dxf | The big sheet |
| 1 | TopPanel.dxf | The other big sheet |
| 2 | SidePlate.dxf | Sides of box |
| 1 | TopPlate.dxf | Top of box |
| 1 | BottomPlate.dxf | Bottom of box |
| --- | Acrylic | --- |
| 1 | bedMount.dxf | Goes under heated bed |
Non-Printed Parts
| Quantity | Description | Comments |
|---|---|---|
| Fasteners | ||
| ? | M3 nut | |
| ? | M3 bolt | ? |
| 2 | M5 nut | For Z-Drive |
| 2 | M4 bolt | For Pivot |
| 2 | M4 nut | |
| Bearings | ||
| 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. |
| 5 | Bearings 4X10X4 | |
| Rods | ||
| 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 |
| Other | ||
| 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. |
| 2 | Hinges | Small hinges to hold cover panel on box |
| 2 | Clasps | You need to keep this thing shut somehow. |
Electronics
Stepper Motors
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).
Controller Electronics
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 deviant. 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.
Extruder
The PortaPrusa supports a couple different extruders. Right now, these are:
J-Head ?
Heated Bed
The PortaPrusa will support any 200mm heated build platform. I use the Mk2 Heated Bed.
