Ball Screw Drunkenness: Debunking the Myth for Miniature Applications

Thomson Industries, Inc.
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Prevent ball screw drunkenness in miniature applications

Thread drunkenness is defined as the erratic pitch error occurring within intervals of one pitch.

Thomson has published a new technical whitepaper to help design engineers manage this issue properly and achieve the required accuracy in new machine design.

Guided by ISO, DIN & JIS industrial standards, many design engineers broadly define lead accuracy of ball screws only in terms of error accumulated over 300 mm (V300) but often overlook the value of measuring or controlling lead accuracy per revolution (V2π). Often referred to as ball screw drunkenness because of the hard-to-predict wobble it introduces into ball screw operation, lead accuracy per revolution is emerging as a critical parameter in miniature screw applications where the overall travel length is less than 300 mm.

Read more about how to prevent ball screw drunkenness in miniature applications in the technical article on the Thomson website.

Visual Interpretation of Thread Drunkenness
Visual Interpretation of Thread Drunkenness

Thread drunkenness is defined as the erratic pitch error occurring within intervals of one pitch. This concept is hard to visualize unless it is represented by unwinding the thread from the screw cylinder as shown in this figure.

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