... electricity is cut off or the tool is broken,intelligent control of spindle makes it able to auto-start and auto-stop ... and power saving.3.Easy operations, DSP handheld controlling, offline control,4.Installed with tool positioning block, very easy to make ... signs,nameplates,chest plates, seals, Architects' models,arts and crafts, industrial molds, instrument panels and etc.X,Y,Z Working Area ...