INK REMAINING AMOUNT CALCULATION METHOD AND DEVICE

摘要

In an ink residue calculating method where the ink residue is calculated by obtaining ink discharge discharged from an ink container on the basis of the number of rotations of a drive motor of an ink supply pump which sucks ink from the ink container and discharges the same and cumulatively subtracting the ink discharge discharged from the ink container from the total ink volume accommodated in the ink container, the ink residue is accurately calculated even if the kind of ink changes. The kind data of the ink is obtained by reading out from the storage means (5) of the ink container (4), the ink discharge of the ink supply pump per unit rotation of the drive motor for standard ink is corrected on the basis of the kind of the ink obtained by the ink residue calculating means (22), and the ink residue is calculated by cumulatively subtracting the value obtained by multiplying the corrected ink discharge by the working time from the total ink volume accommodated in the ink container (4). <IMAGE>