Though the polygraph is colloquially associated with pseudoscientific lie detector assessments, the real creation of the 1st polygraph was created to mechanically replicate the pen strokes of an individual producing. Famously, a polygraph was made use of by previous US President Thomas Jefferson in his “modern office”, a reproduction of which even now sits in the Smithsonian museum. Several of us have a have to have for a pen-based polygraph any longer, but inspiration from the generations-outdated creation can even now be gleaned from the equipment, like in this 3D printer which can output four similar prints at after.

The printer is a Core XY design with 4 independent print heads, which are all locked with each other. The printer behaves as if there is a one print head which keeps it easier than it usually could be. Some further thought requirements to be paid to the print bed to assure it’s stage and flat, and it also features a exceptional Z-axis built to reduce Z-banding from bad good quality leadscrews. It has a reasonably huge print spot, but a recognizable restriction is that it’s primarily quartered, so while it can generate many parts at as soon as, it just can’t generate a single section that employs the full region of the print bed.

Each and every printed aspect employed to make this printer was designed by [Rick] in OpenSCAD. He also crafted a personalized electronics board with the printer drivers, and all other associated circuitry in KiCad. For any one who prints huge volumes of sections, this may possibly be just the trick to boost output without having obtaining to manage extra printers. If you presently have a lot more printers and require an simpler way to regulate them all, get a appear at this committed Raspberry Pi set up to do just that. at?v=DpHZpsEhN6A