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What does "backlash" refer to in a lead screw system?

  1. The wear and tear on mechanical parts

  2. The space between the nut and screw impacting resolution

  3. The excess lubrication within the mechanism

  4. The vibration of the machine during operation

The correct answer is: The space between the nut and screw impacting resolution

Backlash in a lead screw system refers to the space or clearance between the nut and the screw that can affect the system's accuracy and resolution. When the lead screw is rotated in one direction, the nut moves away, and when the direction is reversed, there can be a delay or play before the nut engages with the screw again due to this clearance. This play can lead to imprecise movements, making it difficult to achieve the desired positioning, especially in applications requiring high precision. By recognizing and mitigating backlash, operators can ensure better accuracy and performance in CNC machining tasks.