| 摘要 |
PURPOSE:To prevent the installation of a dustproof member from being forgot, to secure the safety of an operator, and to prevent the deterioration in printing quality, and the invasion of dust to a writing device, by detecting whether the dustproof member is installed to a normal position or not, and displaying a warning, when said member is not installed to the normal position. CONSTITUTION:A warning display is executed by a detecting signal by a microswitch 60 or a photosensor 62. That is, when a signal as to whether a dustproof member 7 is set to a normal position or not is inputted to a CPU 64 by the microswitch 60 or the photosensor 62, when it is decided that the dustproof member 7 is not set normally, the CPU 64 generates a warning lamp display signal in a display 6. In such a way, forgetting to set the dustproof member 7 and defective setting do not occur, a dirty optical device and defective printing are prevented, and also, when a safety switch has not operated, it is also prevented that an eye is injured due to irradiation of laser light. |
