A precision worm and wheel (rotary stage) or ball screw (linear stage) provides repeatable, near zero-backlash positioning. The coupling is positioned between the stage’s electric drive motor and the drive element. Rotary positioning stages are utilized in a range of precision machines, including laser scanners that accurately measure the surface topology of large bearings (shown).
Huco Oldham couplings were selected because they met Racaw’s torque capacity range, zero backlash, auditable noise, and vibration levels, lengthy predicted service life, and availability requirements. Oldham couplings can handle faster movement rates without starting to ‘ring’ under high acceleration and deceleration. In contrast, a beam coupling driven harshly can act as a torque spring and create both noise and vibration.
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