Random failures not allowed here—the u.s. roland case history

When U.S. ROLAND production hardware was first assembled, the resulting reliability was far below the requirement. Rather than rationalizing the failures as ‘random’, each was pursued to correct the cause in design, manufacturing processes, or workmanship. A process and quality plan was implemented with improvements to such items as soldering techniques and circuit-board fabrication. Many design improvements were also incorporated. The test programme was halted and replanned to benefit from an iterative test-fix-test process. The final result was an increase in the reliability to 3.6 times the contract MTBF.     

国内外单张纸平版印刷机咬纸牙系统对比

<正>在单张纸平版印刷机中,咬纸牙直接与纸张接触,是使用最为频繁的部件之一,其设计、制造的优劣直接影响着传纸精度、调整时的方便性及使用寿命等,是印刷机械设计时不可轻视的部分。下面笔者主要以国内单张纸平版印刷机上的咬纸牙结构与德国曼罗兰公司ROLAND 700印刷机上的相关结构进行对比说明。