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The Prusa i3 (iteration 3) is the newest and current 3D Printer design by RepRap Core Developer Prusajr. The i3 incorporates lessons learned from the previous two Prusa designs, as well as other popular modern RepRaps designs.
- Printed Parts: ???
- Non-Printed Parts: ???
- Material Cost: ???
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- Printing Size: ??mm x ??mm x ??mm
- Precision: ??mm (position/printing)
- Speed: ??cm/s (position/printing)
The following is a list of the main improvements made upon the Prusa Mendel Iteration 2
- enhanced frame rigidity (prevents x backlash)
- easy assembly
- parametric files for multiple sizes/bearings or bushings
The development of the Prusa Mendel is hosted on github: https://github.com/josefprusa/Prusa3.
The STL files to make the printer can be found at Clone_wars:_Prusa_iteración_3.
RP every .scad in this directory (except complete-printer) once. Aim for 0.3mm layers and 2.2 extrusion width (width over thickness), for 0.66mm stroke width. Printer is tested at this setting.
Using doc/complete-printer.scad as a visual clue and doc/manual.txt as a guide, build the printer.
There are two major Prusa i3 Frame Styles, the Single Sheet Frame, and the Box Style Frame. The Single Sheet Frame is designed to be manufactured through the use of a Laser cutter, WaterJet, or CNC Mill / Router Table. There are two current development tracks within the Single Sheet Frame, an Aluminium frame style, and a gusseted Wood frame style. Both are designed to support 6mm or thicker framing material. The Box Style Frame is designed to be easily manufactured at home with basic woodworking tools. The Y-axis for both frame styles is similar to that of the older Prusa Mendel Iteration 2.
Single Sheet Frame
This is a frame created from a single sheet of metal, typically Aluminum, but can also be made from various Materials with a thickness greater than 6mm / 0.25 inch
- Looks professional (subjective)
- requires specialised tools (e.g. Water flow jet cutter)
- Less rigid connection between XZ-frame and Y-frame part
Box Style Frame
This frame is created created from 8 small sheets of wood.
- Can be created with standard DIY tools
- More rigid connection between XZ-frame and Y-frame part
- Looks less professional (subjective)
The Prusa i3 uses, including the extruder, 5 NEMA17 stepper motors. Two of these motors, the Z axis motors, are connected to the same stepper driver of the electronics. If using Wade's Extruder, its stepper motor needs a minimum holding torque of 40Ncm (0.4Nm). More information can be found on the Stepper Motor page.
About any RepRap controller works for the Prusa i3. Required features: 4 stepper drivers, 1 thermistor input and 1 heater output for the extruder and optionally another thermistor/heater pair for the heated bed. Choosing the best one for your printer is mostly a matter of taste. For comparisons, see List of electronics, Comparison of Electronics and Alternative Electronics.
On November 12th, 2012 Josef Prusa (@josefprusa) tweeted a picture of his metal frame i3 with a custom dual extruder mounted.
//Need name, info, and link to this extruder and how to build it. Can anyone help? -idolcrasher
Previous posts on Prusa's twitter feed reveal that Sound (Slic3r's Developer) inspired Prusa to attach a dual extruder.
Here you can find some ways how to place the filament spool to the printer
TODO list some ways