A British instrument manufacturer has used a harmonic cancellation algorithm to cut positioning errors dramatically in a new instrument. Simon Smith of Aerotech explains how. PRESCOTT INSTRUMENTS, the Tewkesbury-based specialist test instrument designer and manufacturer, recently introduced a multi-function rheometer for testing rubber and elastomer materials. The instrument incorporates a direct-drive Brushless servomotor to deliver sinusoidal motion that improves its flexibility and supports a wider range of test conditions, The rheometer can provide tests at lower frequencies than usual to improve the study of polymer processability, as well as performing more traditional moving-die rheometer testing and dynamic mechanical analyses to evaluate the cured properties of materials.
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