| 摘要 |
<p>An automatic adjusting device for accurately adjusting a platen gap including an encoder 14 for outputting pulse signals in accordance with a moving distance of a carriage 1, a pulse width detector 31 for detecting a pulse width of the pulse signal when the carriage is moved from a reference position in a direction of the platen 5, a difference calculator 34 for calculating a difference between a pulse width of the pulse signal sent from the pulse width detector 31 and a pulse width of a stored pulse signal, a contact detector 35 for judging a contact position of the recording head 2 with the platen surface by comparing the difference with the reference value, and a controller 30, 36, 37 for controlling a platen gap in accordance with the thickness of a recording medium charged on the platen detected by a pulse signal sent from the encoder 14 and a signal sent from the contact detector 35. A change in the pulse width caused by resistance on the carriage is subtracted by the difference detector to obtain correction data so that the contact point can be accurately detected. <IMAGE></p> |
