Version 1.8.1 adds a new feature, which comes handy when working with aluminium core laminates – it allows to mill the contour of the board in several passes (along the Z axis). There’s a new parameter Max step in Contour milling settings – it specifies how deep the end mill can go in one pass. Code generator will then generate as many passes as needed to reach the specified Z level. Default value of 0 means the entire depth is milled in one pass.