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Pay in 4 interest-free payments of $7.17 Learn more
Ships within 48 hours · Estimated delivery Oct 13 - Oct 18
The basic concept is that a sensor scans the rotation of the spool many times per second and that information is sent to a small computer chip which calculates how to apply the brakes in order to control the spool

No micro springs and pins to lose, no other parts to misalign Next Section: Design and Performance

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