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← TechnologyWhich dimensional issue arises when a CNC lathe consistently cuts slightly oversized threads, despite calibrated tools?
A)Backlash in the leadscrew drive✓
B)Servo motor encoder misalignment
C)Thermal expansion of the workpiece
D)Excessive tool wear compensation
💡 Explanation
Increasing backlash in the leadscrew causes a positioning error because lost motion converts rotary to linear movement inaccurately, therefore threads are oversized rather than caused by thermal effects. Servo misalignment or incorrect compensation wouldn’t be consistent.
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