The benefits of CNC machines, such as their ability to machine contours, accuracy of location and repeatability, must be backed up whenever possible by efficient materials handling and tool changing. The aim is to reduce downtime and to optimise the manufacturing process, at whatever scale of production. It is inefficient to stop a CNC machine to adjust tool clamps or holders. So any setting to centre height or tool datums must, where possible, be made away from the machine.
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