| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of accuracy errors being generated by using a rotary encoder for the purpose of detection of a carrier position of a printer sheet by the use of high detection accuracy of a linear encoder, in carrying control of the printer sheet in a printer using DC motor. SOLUTION: After completion of assembly of the printer, the rotary encoder and the linear encoder having a higher accuracy are synchronously driven, and a pulse count number of the linear encoder is stored in a table under correlation with a pulse count number of the rotary encoder. In actual observation, when a paper feed roller is moved by a prescribed amount, an auxiliary measurement rotary pulse number, corresponding to an auxiliary measurement linear pulse number to be counted by the linear encoder is read; and when the read value is counted by the rotary encoder, it is handled with in such a way that the paper feed roller is considered to have moved by a prescribed amount.
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