Patent ID: 7144094

Claim:
A method of inspecting an ink-jet printer carriage home position, comprising: moving the carriage in a first direction until the carriage is not moved for a first predetermined period of time and determining a current position of the carriage as a first position using a maximum moving distance of the carriage when the carriage is not moved for the first predetermined period of time; moving the carriage in a second direction until the carriage is not moved for a second predetermined period of time and determining a current position of the carriage as a second position when the carriage is not moved for the second predetermined period of time; determining that an error exist in the home position, if a distance between the first position and the second position is not same as the maximum moving distance of the carriage, or when a second currently-determined position is not same as a second previously-determined position; and determining that an error does not exist, if the distance between the first position and the second position is same as the maximum moving distance of the carriage and the second currently-determined position is same as the second previously-determined position; wherein the first and second directions correspond to a direction away from the home position and to a direction towards the home position, respectively.