DISPLAY SYSTEM FOR REMAINING AMOUNT OF TAPE

摘要: PURPOSE:To find the remaining amount of a tape by detecting rotation period supply reel and calculating it using value determined according to hub diameter reel. CONSTITUTION:Supply-reel detector 1 take-up-reel 2 generate pulses each they are counted counters 3 7, whose count values multiplied constant, corresponding speed, multipliers 5 8 signals fS fT which substantially periods both reels. Adder 9 adds together supplies sum comparator 10 compares with threshold preset on basis kinds cassettes differing in diameter. Value (r) found from multiplier inputted operator 12 calculate time tape, is displayed display 14.