Image forming apparatus and conveyance control method

An image forming apparatus comprising:

• a plurality of image forming units configured to form an image in different colors;
• a conveyance mechanism configured to convey a first pattern formed using at least a first image forming unit among the image forming units, that forms the image in a first color, and convey a second pattern formed using a second image forming unit among the image forming units, that forms the image in a second color;
• a detection unit configured to detect the first pattern conveyed by the conveyance mechanism and the second pattern conveyed by the conveyance mechanism;
• a storage unit configured to store a first temperature at the detection of the first pattern and a second temperature at the detection of the second pattern;
• and
• a control unit configured to control, when the first pattern has been previously detected, a timing of conveying a recording sheet to which the image formed using at least the first image forming unit is transferred on the basis of a first time required after the formation of the first pattern and before the detection of the first pattern by the detection unit, the first temperature, and a current temperature, and the control unit configured to control, when the second pattern has been previously detected, a timing of conveying the recording sheet to which the image formed using the second image forming unit is transferred on the basis of a second time required after the formation of the second pattern and before the detection of the second pattern by the detection unit, the second temperature, and the current temperature.

An image forming apparatus comprising:

• a plurality of image forming units configured to form an image in different colors;
• a conveyance mechanism configured to convey a first pattern formed using at least a first image forming unit among the image forming units, that forms the image in a first color, and convey a second pattern formed using a second image forming unit among the image forming units, that forms the image in a second color;
• a detection unit configured to detect the first pattern conveyed by the conveyance mechanism and detecting the second pattern conveyed by the conveyance mechanism;
• a storage unit configured to store therein position adjustment information representing for which one of the first image and the second image position adjustment on a recording sheet has been performed, a first reference value as a reference value of a first time required after the image formation of the first pattern and before the detection of the first pattern by the detection unit, and a second reference value as a reference value of a second time required after the image formation of the second pattern and before the detection of the second pattern by the detection unit;
• and
• a control unit configured to control, when the position adjustment information represents that the position adjustment for the first image on the recording sheet has been performed, a timing of conveying the recording sheet to which the image formed by the first image forming unit is transferred on the basis of the first time and the first reference value and controlling a timing of conveying the recording sheet to which the image formed by the second image forming unit is transferred on the basis of the second time, the first reference value, and the second reference value, and the control unit configured to control, when the position adjustment information represents that the position adjustment for the second image on the recording sheet has been performed, a timing of conveying the recording sheet to which the image formed by the first image forming unit is transferred on the basis of the first time, the first reference value, and the second reference value and controlling a timing of conveying the recording sheet to which the image formed by the second image forming unit is transferred on the basis of the second time and the second reference value.