| 摘要 |
<p>A method of automatically aligning sheet material, especially paper, and an apparatus for performing the method are disclosed. A preferred embodiment of the apparatus is used in a high accuracy pen plotter including an automatic sheet feeder for feeding individual sheets of paper (33) from a paper tray (3) to a platen for plotting. The sheet of paper is automatically fed from the tray to the platen, is pulled entirely free from the tray, and is aligned against a reference edge by moving the paper back and forth a number of times. A microprocessor, various stepper motors and encoders allow for accurate and repeatable positioning and alignment of the sheet of paper to be plotted. After plotting is finished the sheet of paper may be forcefully ejected from the plotter.</p> |
