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# Marlin 3D Printer Firmware
< img align = "right" src = "Documentation/Logo/Marlin%20Logo%20GitHub.png" / >
* [Configuration & Compilation ](/Documentation/Compilation.md )
* Supported
* [Features ](/Documentation/Features.md )
* [Hardware ](/Documentation/Hardware.md )
* [GCodes ](/Documentation/GCodes.md )
* Notes
* [Auto Bed Leveling ](/Documentation/BedLeveling.md )
* [Filament Sensor ](/Documentation/FilamentSensor.md )
##### [RepRap.org Wiki Page](http://reprap.org/wiki/Marlin)
## Quick Information
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This is a firmware for reprap single-processor electronics setups.
It also works on the Ultimaker PCB. It supports printing from SD card+Folders, and look-ahead trajectory planning.
This firmware is a mashup between [Sprinter ](https://github.com/kliment/Sprinter ), [grbl ](https://github.com/simen/grbl ) and many original parts.
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## Current Status: Bug Fixing
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The Marlin development is currently revived. There's a long list of reported issues and pull requests, which we are working on currently.
We are actively looking for testers. So please try the current development version and report new issues and feedback.
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[](https://scan.coverity.com/projects/2224)
[](https://travis-ci.org/MarlinFirmware/Marlin)
What bugs are we working on: https://github.com/MarlinFirmware/Marlin/milestones/Bug%20Fixing%20Round%201
## Contact
__IRC:__ #marlin -firmware @freenode
__Google Hangouts:__ https://plus.google.com/hangouts/_/event/cps5d0ru0iruhl6ebqbk9dpqpa4?authuser=0& hl=da
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## Credits
Sprinters lead developers are Kliment and caru.
Grbls lead developer is Simen Svale Skogsrud. Sonney Jeon (Chamnit) improved some parts of grbl
A fork by bkubicek for the Ultimaker was merged, and further development was aided by him.
Some features have been added by:
Lampmaker, Bradley Feldman, and others...
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## Licence
Marlin is published unde the [GPL license ](/Documentation/COPYING.md ) because I believe in open development.
Please do not use this code in products (3D printers, CNC etc) that are closed source or are crippled by a patent.
[](https://flattr.com/submit/auto?user_id=ErikZalm& url=https://github.com/MarlinFirmware/Marlin& title=Marlin& language=& tags=github& category=software)
