The BIGTREETECH RAMPS 1.6 Plus R6+ is an upgraded mainboard/controller designed for modern 3D printers that want enhanced flexibility and higher current capacity. It improves upon the older RAMPS 1.6 standard by introducing better power handling, selectable driver interface modes (SPI or Step/Dir), more robust connectors, and clearer labeling. If you’re upgrading your machine for more reliable motion control or higher heatbed demand, this board gives you more headroom and options.