Epson FX 1170 Service Manual - Page 102
Bidirectional Alignment Adjustment, 2.1 Overview of the Bidirectional Alignment Adjustment
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REV.-A LEVER, G, ADJUST \ f Figure 4-1. PARALLEUSM ADJUSTMENT BUSHING 4.2 Bidirectional Alignment Adjustment This section describes how to adjust the bidirectional print position to ensure correct printing. (..--, 4.2.1 Overview of the Bidirectional Alignment Adjustment The FX-870/l 170 prints characters when the carriage moves from both left to right and right to left. Therefore, the printing in one direction must be correctly aligned with the printing in the other direction. Otherwise, printed vertical lines may be staggered. It is important to readjust the bidirectional alignment whenever anything has been done to the gear arrangement of the printer mechanism that might affect this alignment. The bidirectional alignment can be adjusted by altering the timing in which the carriage moves from one end to the other. Since no two printer mechanisms are manufactured exactly the same, the bidirectional misalignment correction differs for each printer. Also, the correction value must be written in each E* PROM, and it must be rewritten after each adjustment. 4-2