| 摘要 |
<p>A method of detecting a reduction in tension in a tape, a tape drive and a printing apparatus containing a tape drive wherein the tape is transferrable between a first spool 15 and a second spool 17 by a tape drive 11, the tape drive having a motor control system 25 which includes two DC motors 16, 18 and a controller 24 for controlling the operation of the motors, the tape drive also having two spool supports 12, 14, each of which is suitable for supporting a spool of tape, and each of which is driven by a respective one of the motors, and where a value relating to the current required to be supplied to each motor to maintain tension in the tape is stored, and compared with a value relating to the current being supplied to each of the motors during tape transfer with the respective stored values. In the event that at least one of the values relating to current being supplied to the motors during tape transfer is lower than the respective stored value, the motor control system indicates that the tension in the tape has reduced.</p> |
