Linear Advance for Prusa i3 MK2

thingiverse

This firmware update unlocks Linear Advance capabilities.\r\nDownload link: http://www.prusamk2.com/linear-advance-prusa-mk2/\r\n\r\nOverview:\r\nOrigin: Marlin Software\r\n\r\nUnder normal circumstances, the extruder axis behaves similarly to the XYZ linear axes. The extruder motor moves proportionally with other motors, maintaining synchronized acceleration profiles and start-stop points. However, an extruder is not a linear system, resulting in excessive material being deposited at movement endings.\r\n\r\nConsider the standard test cube: even with optimal settings, corners tend to bleed out rather than remaining sharp. Solid infill on top displays roughness where perimeter directions change. While these issues are minor at low speeds, they become more pronounced and problematic as printing velocities increase.\r\n\r\nAdjusting flow rates can help, but this may lead to under-extrusion when initiating new lines. Some slicers offer an option to stop extruding early in each move, adding complexity to the G-code and requiring re-tuning for varied temperatures and materials.\r\n\r\nThe root cause lies in pressure, so LIN_ADVANCE decouples extrusion from other axes to produce accurate nozzle pressure, adapting to printing speed. Once Linear Advance is properly calibrated, bleeding edges and rough solid infill should be nearly eliminated.\r\n\r\nAgain...\r\nDownload link: http://www.prusamk2.com/linear-advance-prusa-mk2/