What is a CNC Machine? CNC : Computerised Numerical ...

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WhatisaCNCMachine?CNC:ComputerisedNumeri calControl(Computer+NumericalControl) Numericalcontrolisaprogrammableautomatio ninwhichprocessiscontrolledbyNumbers,Let ters,andsymbols. CNCMachiningisaprocessusedinthemanufactu ringsectorthatinvolvestheuseofcomputerst ocontrolmachinetoolslikelathes, Tomanufacturecomplexcurvedgeometriesin2D or3Dwasextremelyexpensivebymechanicalmea ns(whichusuallywouldrequirecomplexjigsto controlthecuttermotions) MachiningcomponentswithhighRepeatability andPrecision Unmannedmachiningoperations Toimproveproductionplanningandtoincrease productivity However,sincethegrooveintheballscrewishe lical,itssteelballsrollalongthehelicalgr oove,and,then,theymaygooutoftheballnutun lesstheyarearrestedatacertainspot. Itconsistsofascrewspindle,anut,ballsandi ntegratedballreturnmechanismashowninFigu re. , configuration3 Thus,itisnecessarytochangetheirpathafter theyhavereachedacertainspotbyguidingthem ,oneafteranother,backtotheir startingpoint (formationofarecirculationpath).

• The slide ways, guide and spindles of the CNC ... •The lead screws are usually of the Acme thread form, which are inefficient due to the high frictional resistance between the flanks of the screw and the nut. There is also backlash, because of …

  Thread, Acme, Spindle, Acme thread