MAGNETIC RECORDERRREPRODUCER

摘要

PURPOSE:To achieve the stabilization of tape feed speed by controlling the motor of a take-up reel according to the running speed of tape thereby giving fixed tension to the tape. CONSTITUTION:A pulse generator 23 consisting of photoelectric elements 18, 19 and a multiplicity of non-transparent patterns 17 are provided to reversing roller 11. The output signal thereof is inputted to a microprocessor 24 and the revolutions of a take-up drive motor 32a are controlled according to the tape speed. On the other hand, the outputs of the oscillators being reel revolution number detecting means constiting of photoelectric elements and discs having through-holes mounted to reels are inputted to the processor 24 to control the supply voltage of the drive motor 32 for supply reel, thereby giving specified fixed tension to the tape. Such constitution enables all tape feed speeds to be stably set.