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

WhatisaCNCM achine?CNC:ComputerisedNumericalControl( Computer+NumericalControl) Numericalcontrolisaprogrammableautomatio ninwhichprocessiscontrolledbyNumbers,Let ters,andsymbols. CNCM achiningisaprocessusedinthemanufacturing sectorthatinvolvestheuseofcomputerstocon trolmachinetoolslikelathes, Tomanufacturecomplexcurvedgeometriesin2 Dor3 Dwasextremelyexpensivebymechanicalmeans( whichusuallywouldrequirecomplexjigstocon trolthecuttermotions) MachiningcomponentswithhighRepeatability andPrecision Unmannedmachiningoperations Toimproveproductionplanningandtoincrease productivity However,sincethegrooveintheballscrewishe lical,itssteelballsrollalongthehelicalgr oove,and,then,theymaygooutoftheballnutun lesstheyarearrestedatacertainspot.

Characteristics of ball screws • High mechanical efficiency In ball screws, about 90% or more of the force used to rotate the screw shaft can be converted to the force to move the ball nut. Since friction loss is extremely low, the amount of force used to rotate the screw shaft is as low as one third of that needed for the acme thread lead screw.

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