Lathe control system

A lathe used for machining a workpiece having three dimensional curved surface, the lathe comprising:

• an input module;
• a control module electrically connected with the input module;
• a work table for fixing the workpiece, and rotated by a rotating driving module electrically connected with the control module;
• a feeding module electrically connected with the control module;
• a first sliding module electrically connected with the control module to drive the feeding module to move along a first direction;
• a second sliding module electrically connected with the control module to drive the feeding module to move along a second direction substantially perpendicular to the first direction;
• and
• a cutter positioned on the feeding module,
• wherein when the first sliding module drives the feeding module slide along the first direction, or the second sliding module drives the feeding module slide along the second direction, the feeding module controls the cutter move back and forth along a third direction with a fixed frequency to machine the workpiece, a reciprocating distance of a movement of the cutter relative to the workpiece is reduced, the third direction is substantially perpendicular to the first and second direction, the rotating driving module controls the work table to rotate, and a value of a cutter distance for the cutter moving back and forth along the third direction is controlled to be decreased by the feeding module with a motion of the feeding module along the first direction or the second direction, thereby the three dimensional curved surface of the workpiece which has an average surface roughness of about 0.2 micron to about 1.0 micron.