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evi7538
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I got pretty good results with NEMA 14 stepper and ceramic ABEC5 bearings: the positioning noise is around 3 arcsec RMS, good enough for my project
What Are the Best Low-Friction Bearings for Precision Positioning Mechanisms?
- Thread starter evi7538
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The discussion focuses on designing a precision rotational mechanism for angular positioning of an optical element, requiring high repeatability and low positioning noise. The user is exploring options for low-friction bearings, considering factors like ABEC classes, bearing materials, and seal types to minimize friction. Suggestions include using ceramic bearings for their low coefficient of friction and exploring flexure-based positioning solutions to avoid hysteresis and wear associated with traditional bearings. The importance of proper lubrication and non-contact seals to reduce friction is emphasized, along with the potential of voice coil actuators for precision. Overall, the conversation highlights various bearing technologies and design considerations for achieving precise angular positioning.
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