5. What is back driving and why is it important?
Power transmission screws—ball screws and lead screws—are typically used for converting rotary motion to linear motion. But when a load is applied axially to the nut, they do the opposite and convert linear motion to rotary motion. This is known as back driving, and is generally an unwanted effect. Although it can occur regardless of the screw’s orientation, back driving most often occurs in vertical applications when the holding mechanism fails.
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