Length expansion and contraction system for numerically- controlled machine tool has tube accommodating carriage and includes position sensors

摘要

The machine tool system (10) includes a nut (30) moving on a spindle (28), moving a carriage. There is a system for setting and measuring the position of the carriage. An inner tube (18) is concentrically enclosed in an outer tube (12) which may be rotated by an electric motor. A chuck (14) is mounted at one end of the tube.