The vertical alignment in the spindle ensures that metal chips can accumulate around the surface from the workpiece and must be cleared. Open loop stepper systems run in one course – within the controller for the stepper motor. Conversely, shut loop systems run two means, and may therefore get feedback. https://how-to-properly-drill-int08630.blogdosaga.com/31977594/an-unbiased-view-of-industrial-milling-technology