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title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" title="熱敏打印機(jī)">熱敏打印機(jī)" 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????關(guān)鍵詞: 熱敏打印機(jī)? 熱敏行式打印機(jī)? 微型打印機(jī)? 高速

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??? 熱敏打印機(jī)具有噪音低,、速度快、可靠性高、打印字符清晰等優(yōu)點(diǎn),目前已在POS終端系統(tǒng),、銀行系統(tǒng),、醫(yī)療儀器等領(lǐng)域得到廣泛應(yīng)用。熱敏打印機(jī)根據(jù)其熱敏元件的排列方式可分為行式熱敏(Thermal Line Dot System)和列式熱敏(Thermal Serial Dot System)^[1],。列式熱敏屬于早期產(chǎn)品,目前主要應(yīng)用在一些對(duì)打印速度要求不高的場(chǎng)合,國(guó)內(nèi)已有作者在其產(chǎn)品中使用^[2～3],。行式熱敏屬20世紀(jì)90年代技術(shù),其打印速度比列式熱敏快得多,目前最快速度已達(dá)到220mm/秒。要實(shí)現(xiàn)高速熱敏打印,除了選取高速熱敏打印頭外,還必須有相應(yīng)的控制板與之配合,。由于其進(jìn)口原裝控制板價(jià)格昂貴,且有的不支持漢字打印,因此受日本精工代理商的委托,開(kāi)發(fā)了一種基于77E58的高速行式熱敏打印機(jī)控制板,該控制板具有打印速度快,、性能穩(wěn)定等特點(diǎn),目前已在中國(guó)移動(dòng)、中國(guó)聯(lián)通,、中國(guó)電信等1000多家營(yíng)業(yè)廳的話費(fèi)清單打印機(jī)中得到應(yīng)用,。?

1 行式熱敏打印的原理?

??? 行式熱敏打印頭(LTP2342)原理框圖如圖1所示。在一條長(zhǎng)72mm的基體上均勻安裝了576個(gè)發(fā)熱元件,。打印前將V_p連到打印機(jī)電源,要打印的數(shù)據(jù)在時(shí)鐘CLK的配合下由DAT端移到移位寄存器,。當(dāng)一個(gè)點(diǎn)行576位數(shù)據(jù)全部移到移位寄存器后,鎖存端為低,將移位寄存器的數(shù)據(jù)鎖存到鎖存寄存器;然后在數(shù)據(jù)選通端產(chǎn)生低電平,此時(shí)根據(jù)輸入的數(shù)據(jù)是1或0決定發(fā)熱元件是否發(fā)熱,從而在熱敏紙上產(chǎn)生要打印的點(diǎn)行。行式熱敏打印頭的控制信號(hào)的時(shí)序圖如圖2所示,。?

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2 高速行式熱敏打印機(jī)的實(shí)現(xiàn)方法?

??? 要實(shí)現(xiàn)行式熱敏打印機(jī)打印的高速化,在設(shè)計(jì)時(shí)必須考慮如下三方面的內(nèi)容,。?

??? (1)選用高速行式熱敏打印頭?

??? 雖然行式熱敏打印比列式的速度快,但不同的行式熱敏打印頭的打印速度差別相當(dāng)大,從最慢的20mm/s到最快的220mm/s。速度的快慢主要取決于打印頭的工作電壓,、發(fā)熱元件的發(fā)熱效率,、走紙電機(jī)的性能以及數(shù)據(jù)傳送方式等。因此要實(shí)現(xiàn)高速打印,必須選取高速的熱敏打印頭,如日本精工(SII)的LTP2342(75mm/s),、LTPF347(220mm/s),、日本EPSON的532(150mm/s)等。?

??? (2)選用高速微處理器及快速存儲(chǔ)器?

??? 熱敏打印機(jī)控制板的主要功能是接收由主機(jī)發(fā)來(lái)的數(shù)據(jù),然后將每一個(gè)字符的字形碼從內(nèi)存(ROM)中取出,并按照一定格式放入內(nèi)存(RAM)中的打印點(diǎn)行緩沖區(qū),最后將點(diǎn)行緩沖區(qū)的內(nèi)容送到打印頭的移位寄存器中,進(jìn)行加熱打印,。打印的漢字采用24×24點(diǎn)陣,這樣對(duì)每一個(gè)漢字,就要先由該漢字的機(jī)內(nèi)碼計(jì)算出存放在ROM的地址,再?gòu)腞OM中讀取72次數(shù)據(jù),然后計(jì)算RAM中的地址,往RAM中寫入72次數(shù)據(jù),。對(duì)于如此大量的數(shù)據(jù)存儲(chǔ)及轉(zhuǎn)換,必須采用高速的CPU和存儲(chǔ)時(shí)間小的ROM及RAM,否則將在數(shù)據(jù)存儲(chǔ)及轉(zhuǎn)換上花費(fèi)大量時(shí)間,從而降低打印速度。?

??? (3)先進(jìn)的控制模式?

??? 從熱敏打印頭的方面看,控制時(shí)序是如下進(jìn)行的:數(shù)據(jù)傳送→數(shù)據(jù)鎖存→打印頭加熱→走紙,然后開(kāi)始下一行的傳送和打印,。數(shù)據(jù)鎖存是瞬間完成的,它的時(shí)間可以忽略不計(jì),故對(duì)一般的控制模式,打印頭的主要時(shí)間分配如表1所示,。?

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??? 對(duì)于行式熱敏打印機(jī),為了提高打印速度,都采用雙緩沖寄存器。因此必須充分利用這個(gè)特點(diǎn),采用先進(jìn)的控制模式,如表2所示,。先進(jìn)的控制模式就是在打印頭加熱時(shí),CPU完成下一行的數(shù)據(jù)轉(zhuǎn)換及數(shù)據(jù)傳送,。?

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??? 以LTP2342打印頭為例比較兩種控制模式的打印速度。LTP2342每一點(diǎn)行為576個(gè)點(diǎn),。假設(shè)數(shù)據(jù)的傳輸頻率為1MHz,每一點(diǎn)行的加熱時(shí)間為1ms,走紙電機(jī)的驅(qū)動(dòng)頻率為1500pps,這樣用一般控制模式,打印每一點(diǎn)行的時(shí)間為:0.765+1+0.667=2.43ms,打印速度為410點(diǎn)行/秒;用先進(jìn)的控制模式,打印每一點(diǎn)行的時(shí)間為:1+0.667=1.667ms,打印速度為599點(diǎn)行/秒,。由此可見(jiàn),控制模式對(duì)打印速度影響很大。?

3 硬件設(shè)計(jì)?

??? 本打印機(jī)控制板的硬件總體框圖如圖3所示,。整個(gè)電路主要由主控電路,、走紙電機(jī)控制及打印頭狀態(tài)檢測(cè)電路、打印頭保護(hù)電路及頭溫測(cè)量電路組成,。?

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3.1 主控電路?

??? 主控電路由微處理器,、IMP810復(fù)位芯片,、62256靜態(tài)存儲(chǔ)器、29C040FLASH,、XC9536CPLD,、Max232串行接口芯片組成。?

??? 考慮到價(jià)格及采購(gòu)的便易,本控制板采用Winbond的高速微處理器77E58,77E58的時(shí)鐘頻率為40MHz,每個(gè)機(jī)器周期為4時(shí)鐘周期,?？刂瞥绦颉SCII字符的字型碼(24×12)以及中國(guó)移動(dòng),、中國(guó)聯(lián)通及中國(guó)電信的圖標(biāo)存放在77E58的內(nèi)部32K字節(jié)的FLASH中,32K的62256靜態(tài)存儲(chǔ)器主要作為接收數(shù)據(jù)緩沖區(qū),512K的29C040存放24×24點(diǎn)陣的國(guó)標(biāo)一,、二級(jí)漢字字庫(kù)及1～3區(qū)的字符。XC9536實(shí)現(xiàn)的功能主要有:擴(kuò)展77E58地址線以訪問(wèn)29C040,、并行接口數(shù)據(jù)的鎖存及控制,、部分熱敏頭控制信號(hào)的產(chǎn)生等。?

??? 將內(nèi)存的點(diǎn)行緩沖區(qū)的數(shù)據(jù)輸出到打印頭的移位寄存器中,可以有不同的方式,。一種是用外加74LS166移位寄存器[4],但這種方法會(huì)導(dǎo)致外圍電路復(fù)雜;第二種可采用DSP控制器本身的串行同步口進(jìn)行傳送^[5]。本控制板直接采用單片機(jī)的I/O口線,用軟件移位的方法,將要打印的字節(jié)數(shù)據(jù)轉(zhuǎn)換為串行數(shù)據(jù)移到打印頭的寄存器中,。本控制板采用先進(jìn)的控制方式,即利用行式熱敏打印機(jī)的雙緩沖寄存器結(jié)構(gòu),在給打印頭加熱時(shí),CPU進(jìn)行數(shù)據(jù)轉(zhuǎn)換和數(shù)據(jù)傳輸,。采用40MHz的77E58,傳送576個(gè)點(diǎn)數(shù)據(jù)(72字節(jié))的時(shí)間小于打印頭的加熱時(shí)間(一般為1ms左右),故這種方法既接口簡(jiǎn)單又不影響打印速度。?

3.2 走紙電機(jī)控制電路?

??? LTP2342走紙電機(jī)采用的是雙極斬波驅(qū)動(dòng)的步進(jìn)電機(jī),本控制板采用三菱公司的步進(jìn)電機(jī)專用驅(qū)動(dòng)電路M54646來(lái)驅(qū)動(dòng)走紙電機(jī),控制電路如圖4所示,。M54646為恒流斬波驅(qū)動(dòng)的步進(jìn)電機(jī)控制芯片,通過(guò)控制VR腳的電壓控制供給步進(jìn)電機(jī)的電流,。一般來(lái)說(shuō),供給的電流越大,步進(jìn)電機(jī)的力矩越大,但走紙?jiān)胍粢苍酱蟆Ｔ谀軒?dòng)打印紙的情況下,應(yīng)盡量采用較小的供電電流,。通過(guò)VR1與VR2的組合,可以給54646提供不同的基準(zhǔn)電壓VR,從而給走紙電機(jī)提供不同的供電電流,。?

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3.3 打印頭保護(hù)及頭溫測(cè)量電路?

??? 對(duì)打印頭的保護(hù)是打印機(jī)控制板好壞的重要標(biāo)志。由于行式熱敏打印機(jī)對(duì)發(fā)熱元件的加熱時(shí)間都是毫秒級(jí),如果對(duì)發(fā)熱元件連續(xù)加熱超過(guò)1秒,將會(huì)燒壞打印頭,因此對(duì)打印頭的保護(hù)必須及時(shí),、可靠,。?

??? 從行式打印機(jī)的原理圖中可以看出,要使發(fā)熱元件加熱,除寄存器中數(shù)據(jù)點(diǎn)為高外,還必須將頭電壓V_p接到供電電源且腳為低電平。只要任一條件不滿足,就不可能給打印頭加熱,也就不會(huì)燒壞打印頭,。一般電路都是用單片機(jī)控制及V_p電源,如果單片機(jī)正常工作,則可以保護(hù)打印頭,但如果單片機(jī)本身?yè)p壞,就很可能燒壞打印頭,。本電路采用了雙重保護(hù)電路,由單片機(jī)控制,對(duì)V_p的控制則采用一種獨(dú)立于單片機(jī)的保護(hù)電路。保護(hù)電路如圖5所示,。圖中打印頭的電源V_p是通過(guò)開(kāi)關(guān)管" title="開(kāi)關(guān)管">開(kāi)關(guān)管連接到供電電源,對(duì)開(kāi)關(guān)管的控制是通過(guò)一個(gè)可重觸發(fā)的單穩(wěn)觸發(fā)器(74HC123)進(jìn)行的,。當(dāng)在觸發(fā)器的2腳加入一個(gè)脈沖時(shí),觸發(fā)器就會(huì)控制開(kāi)關(guān)管導(dǎo)通一定時(shí)間,導(dǎo)通時(shí)間由C39和R34決定。如果不在導(dǎo)通時(shí)間內(nèi),再在2腳繼續(xù)加入觸發(fā)脈沖,則開(kāi)關(guān)管關(guān)斷,。開(kāi)始上電時(shí)由復(fù)位信號(hào)加到觸發(fā)器的3腳,使開(kāi)關(guān)管關(guān)斷,。這樣如果單片機(jī)損壞,則不可能復(fù)位后在2腳產(chǎn)生脈沖信號(hào),開(kāi)關(guān)管也就不可能導(dǎo)通。這種雙重保護(hù)電路大大提高了保護(hù)打印頭的可靠性,在本控制板的實(shí)際應(yīng)用中取得了很好的保護(hù)效果,。?

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??? 由于對(duì)頭溫檢測(cè)的精度要求不是很高,本電路采用軟件的方法實(shí)現(xiàn)A/D轉(zhuǎn)換,。打印頭的溫度傳感器的信號(hào)連到TH腳,溫度越高,TH電位越高,。轉(zhuǎn)換前將TEMP腳置低,轉(zhuǎn)換時(shí)將TEMP腳置高,這樣就通過(guò)電阻R22對(duì)電容C13進(jìn)行充電。單片機(jī)每隔一定時(shí)間采集一次TE_MPO狀態(tài),這樣溫度越高,比較器輸出電位翻轉(zhuǎn)的時(shí)間越長(zhǎng),從而采集的數(shù)據(jù)越大,。?

4 軟件設(shè)計(jì)?

??? 軟件的主要功能是接收來(lái)自主機(jī)通過(guò)串口或并口發(fā)來(lái)的數(shù)據(jù),然后判斷數(shù)據(jù)的類型,。如果是可打印的字符,則從FLASH中取出各字符的字形碼,并進(jìn)行轉(zhuǎn)換,然后送往打印頭的行緩沖區(qū)進(jìn)行打印;如果數(shù)據(jù)是控制命令,則轉(zhuǎn)到相應(yīng)控制命令的執(zhí)行程序。本控制板實(shí)現(xiàn)了英文和漢字的混合打印,。限于篇幅,程序框圖及程序清單省略,感興趣的讀者可與作者聯(lián)系,。?

??? 使用77E58微處理器開(kāi)發(fā)的高速行式熱敏打印機(jī)控制板具有打印速度快、打印頭保護(hù)功能可靠,、性能穩(wěn)定的優(yōu)點(diǎn),已在電信部門的1000多家電信營(yíng)業(yè)廳得到應(yīng)用,取得較好的社會(huì)效益和經(jīng)濟(jì)效益,。?

??? 本打印機(jī)采用的是日本精工LTP2342熱敏打印頭,其打印速度最快為75mm/s,即600點(diǎn)行/秒,按打印24×24點(diǎn)陣的漢字字符計(jì)算,行間距為4,則打印速度為600/(24+4)=21行/秒。如果要開(kāi)發(fā)速度更快的熱敏打印機(jī),就應(yīng)選用速度更快的熱敏打印頭,如EPSON532(150mm/s)或日本精工LTPF347(220mm/s),同時(shí)也應(yīng)選擇更高性能的微處理器(如Dallas的89C420或32位的微處理器)來(lái)進(jìn)行數(shù)據(jù)轉(zhuǎn)換及傳輸,。?

參考文獻(xiàn)?

1 Thermal Printers Product Catalog.Seiko Instrument Inc,2001?

2 竇振中,汪立森.熱敏打印機(jī)設(shè)計(jì)原理.電子計(jì)算機(jī)與外部設(shè)備,2000;24(3):22～23?

3 竇振中,汪立森.標(biāo)準(zhǔn)并行接口漢字熱敏微型打印機(jī)的實(shí)現(xiàn).電子計(jì)算機(jī)與外部設(shè)備,2000;24(4):22～23?

4 楊安平,朱 皖.8098在微型熱敏打印機(jī)中的應(yīng)用.電子產(chǎn)品世界,1999;11(4):50～51?

5 李享元,盧松濤,尹冬元等.DSP串行同步口“無(wú)縫”驅(qū)動(dòng)熱敏打印機(jī).電子產(chǎn)品世界,2000;11(5):38～39