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Home > Courses > 1P21_Razavi
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Consider a magnetic tape cassette. The tape is transported across the heads
at a constant speed of 4.7625 cm/s. Contrary to popular belief, this is not
done by driving the feed and take-up hubs. Actually, the tape is moved by
being squeezed between a precisely rotating shaft -- the capstan -- and a soft
pinch roller.
- If the capstan has a diameter of 0.238 cm how fast must it turn?
- Why not drive the take-up and feed reels?
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