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# miniprusa MC3
## FDM/FFF 3D printer project
Heavy Duty, small factor, cartesian (bedslinger) machine capable of printing high detail FDM prints. Project is loosely based on Bearmod project for Prusa i3.
Fusion360 model: https://a360.co/3Ne5RhL
![miniprusa render](Renders/miniprusa-all-v1-izo.png)
<iframe src="https://myhub.autodesk360.com/ue2b19d70/shares/public/SH9285eQTcf875d3c5397a93f14336cc3308?mode=embed" width="800" height="600" allowfullscreen="true" webkitallowfullscreen="true" mozallowfullscreen="true" frameborder="0"></iframe>
## Features
- ~100x100x110 [mm] build volume
- Direct MK3s extruder [remixed] for MK8/HobbGoblin drive gear and filament sensor (switch)
- Popular [Bearmod] XZ axis design, inverted
- LM8UU and 8mm smooth rods linear guide
- Rigid metal frame out of steel plates, 2040 and 2060 aluminum profiles
- Dual Z axis is driven independent with 1:2 gear ratio with nema 17 motor for each side
- [Marlin] 2.0.9.1 with auto bed leveling
- Custom ergonomic controller with OLED and encoder
![miniprusa render](Renders/miniprusa-all-v1-front.png)
![miniprusa render](Renders/miniprusa-all-v1-back.png)
![miniprusa render](Renders/miniprusa-all-v1-left.png)
## Technical details
### Frame
Frame consists of 2040 and 2060 aluminum extrusion profiles with 6mm groove. Steel plates and 3 printed bars (front, back and top) are holding extrusions in place secured with M5 screws and t-nuts.
### XYZ drive
Nema 17 stepper drivers for all axes. GT2 belt and pulleys. Dual Z axis consist of two trapezoidal screws with 8mm pitch (TR8x2) driven by independent motors with 1:2 gear ratio (GT2 T20 and GT2 T40).
### Extruder
Extruder is simplified PRUSA MK3 extruder with HobbGoblin/MK8 drive gear and 624ZZ idler bearing (PRUSA MK2s style).
Very consistent extrusion ;)
### Electronics
Currently project uses RAMPS (https://reprap.org/wiki/RAMPS_1.4), as it is the most common mainboard.
Link to: [OLED Controller with encoder] project.
Power supply should be at least 200W
PSU is not mounted on the frame as printer was supposed to be in enclosure.
### Additions
Two types of cable tubing hoses 10mm (X,Y axes and OLED controller) and 16/17mm (extruder)
## BOM
The design require printed parts, so owning, renting 3d printer or outsourcing is needed.
Material PETG (open) or ABS, ASA (especially, if enclosing) are recommended.
Full [BOM spreadsheet] file.
Summary:
![BOM podsumowanie](BOM/podsumowanie_bom.png)
## Firmware changes
Marlin 2.0.9.1 (v1), but 2.0.9.3 is being currently tested (v1.1).
## Development
Want to contribute? Great!
To do:
> - revise Y axis
- change endstop position
- redesign bed plate
- consider
- redesign Z axis (one motor & synchronous belt drive)
> - BOM (translate, ensure correct number of screws and bolts, update links, double-check content)
Feel free to leave additional feedback.
[Forum thread] in Polish
## License
GPLv3
**Open Source, Hell Yeah!**
[//]: # (REFLINKS)
[bearmod]: <https://www.thingiverse.com/thing:4362586>
[remixed]: <https://www.thingiverse.com/thing:4566108>
[Marlin]: <https://marlinfw.org/>
[BOM spreadsheet]: <https://github.com/jgxftw/miniprusa/BOM/>
[Reprap Forum thread]:<https://reprap.org/forum/read.php?13,499572,page=1>
[Forum thread]: <https://reprapy.pl/viewtopic.php?f=78&t=7788&hilit=ma%C5%82a+czarna#p127598>
[OLED Controller with encoder]: <https://github.com/jgxftw/minioled>