Better production parts

No human hope to control the movement of the machineas precisely as a CNC.These machine use with very small units of measure.A CNC is able to drill a hole at one end of the work table,move to the far corner and return to make the same hole again with only a ten-thousand of an inch errer.The accuracy of CNC an be explane this way take a hair of your head and slice it thelong way six times.The silver you have left is about the margin of error with the machine.