This can be a result of the D1 Professional’s compressed dual beam technology and the fact that – as opposed to most hobbyist styles – you can include an infrared module.  If you consider the other Model of a similar machine known as Shapeoko XL which has double the reducing https://tinybookmarks.com/story19680928/the-smart-trick-of-4-axis-cnc-mill-that-nobody-is-discussing