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While the price of 3D printers has come down quite a lot in the past few years, filament continues to be rather pricey especially for those doing a lot of printing. This has led to some people looking to alternatives for standard filament, including recycling various forms of plastic. We’ve seen plenty of builds using various materials, but none so far have had this level of quality control in the final project.
What sets this machine apart from others is that it’s built around an Arduino Nano and includes controls that allow the user to fine-tune a PID controller during the conversion of the recycled plastic into filament. Different plastic bottles have different material qualities, so once the machine is started it can be adjusted to ensure that the filament produced has the exact specifications for the printer. The PCB is available for download, and the only thing that needs to be done by hand besides feeding the machine to start it is to cut the plastic into strips for the starter spool. There is also a separate 3D printed tool available to make this task easy, though.
Not only could this project save printing costs, but it also keeps harmful plastics out of landfills and other environments. Recycling plastic tends to be quite difficult since producing new plastic is incredibly cheap, and the recycled material can’t be used as often as other materials such as aluminum. But there are still plenty of people out there trying to reuse as much of it as they can.
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