Image forming device

An image forming device, comprising:

• paper position signal detecting means for irradiating coherent rays of light onto a surface that moves accompanying transfer of paper and for receiving reflected light of the rays of light to generate paper position signals related to positions of the paper;
• paper transfer amount calculating means for calculating at each specified unit of driving time, through chronological comparison of the paper position signals, a paper transfer amount corresponding to the distance by which the paper has been transferred during each unit of driving time;
• paper transferring means for transferring the paper by using a driving source at a specified driving speed at each specified time section;
• correlation value determining means for determining whether or not a correlation value of the paper position signals, which have been compared for calculating the paper transfer amount by the paper transfer amount calculating means, is equal to or higher than a specified reference correlation value;
• paper transfer amount control value setting means for setting the calculated paper transfer amount as the paper transfer amount control value for a corresponding unit of driving time when it has been determined by the correlation value determining means that the correlation value is equal to or higher than the reference correlation value and for setting a predetermined standard transfer amount as the paper transfer amount control value for a corresponding unit of driving time when it has been determined that the correlation value is lower than the reference correlation value;
• and
• time section setting means for setting a time section on the basis of an accumulated value of the paper transfer amount control values.

An image forming device, comprising:

• paper position signal detecting means for irradiating coherent rays of light onto a surface that moves accompanying transfer of paper and for receiving reflected light of the rays of light to generate paper position signals related to positions of the paper;
• paper transfer amount calculating means for calculating at each specified unit of driving time, through chronological comparison of the paper position signals, a paper transfer amount corresponding to the distance by which the paper has been transferred during each unit of driving time;
• paper transferring means for transferring the paper by using a driving source at a specified driving speed at each specified time section;
• accumulated transfer amount determining means for determining whether or not the accumulated value of the calculated paper transfer amount from the starting point of the time section is smaller than a specified lower limit distance when the accumulated value of driving time of the driving source from the starting point of the time section has reached a specified determining time;
• and
• time-section-setting-means for defining, when it has been determined by the accumulated transfer amount determining means that the accumulated value of the calculated paper transfer amount is smaller than the specified lower limit distance, a point of time at which the transfer amount of the paper, calculated from the starting point of the time section on the basis that the transfer amount per unit driving time is a predetermined standard transfer amount, has reached a prescribed section distance as a terminating point of the time section, otherwise defining a point of time at which the accumulated value of the calculated paper transfer amount from the starting point of the time section has reached the prescribed section distance as the terminating point of the time section.

An image forming device, comprising:

• paper position signal detecting means for irradiating coherent rays of light onto a surface that moves accompanying transfer of paper and for receiving reflected light of the rays of light to generate paper position signals related to positions of the paper;
• paper transfer amount calculating means for calculating at each specified unit of driving time, through chronological comparison of the paper position signals, a paper transfer amount corresponding to the distance by which the paper has been transferred during each unit of driving time;
• paper transferring means for transferring the paper by using a driving source at a specified driving speed at each specified time section;
• accumulated time determining means for determining whether or not an accumulated driving time of the driving source from the starting point of the time section is shorter than a specified lower limit time when the accumulated value of the calculated paper transfer amount from the starting point of the time section has reached a specified determining distance;
• and
• time section setting means for defining, when it has been determined by the accumulated time determining means that the accumulated driving time of the driving source is shorter than the specified lower limit time, a point of time at which the transfer amount of the paper, calculated on the basis that the transfer amount per unit driving time is a predetermined standard transfer amount, has reached a prescribed section distance as the terminating point of the time section, otherwise defining a point of time at which the accumulated value of the calculated paper transfer amount from the starting point of the time section has reached the prescribed section distance as the terminating point of the time section.