磁带拖动机构(见图1)的作用,就是根据存储器的控制器发出的指令,在读写磁头底下移动磁带。同时,这个机构也直接在磁带上进行写入和读出信息的操作。图2示出磁带拖动机构的框图,其主要组成部分有:拖带机构、有两个卷带盘的供带和卷带装置、读写信息电路、拖带机构的电磁装置的直接控制线路、读写磁头和抹去磁头、控 The function of the tape drive mechanism (see Figure 1) is to move the tape under the read-write head according to the instructions from the memory controller. At the same time, the agency also wrote and read information directly on the tape. Figure 2 shows a block diagram of a tape drive mechanism, the main components of which are: a towing mechanism, a tape supply and take-up device with two take-up tapes, a read-write information circuit, a direct control circuit of the electromagnet device of the towing mechanism, read Write head and erase the head, control