Copy machine and non-transitory computer readable recording medium stored with control program for copy machine

A non-transitory computer readable recording medium stored with a control program for controlling a copy machine comprising:

• a reading unit that reads an image of a document such that a long-side direction of the document is in line with a reading sub-scan direction and a short-side direction is in line with a reading main scan direction;
• a rotation unit that rotates image data acquired by reading the image of the document by said reading unit;
• an operation panel unit that accepts copy settings from a user;
• and an image forming unit that forms the image on paper based on image data acquired by reading the image of the document by said reading unit or based on the image data rotated by said rotation unit, such that a transport direction of the paper is in line with a writing sub-scan direction and a direction orthogonal to said writing sub-scan direction is in line with a writing main scan direction, said program causing said copy machine to execute a process comprising:
• calculating, in a case when the paper is fed to said image forming unit in a first direction in which a long-side direction of the paper matches said writing sub-scan direction, a first time required for a first copying process, which contains, the time required for a reading process of the document and the time required for an image forming process on the paper that is fed in said first direction, based on the accepted copy settings after the operation panel unit accept the copy settings of the user;
• calculating, in a case when the paper is fed to said image forming unit in a second direction in which a short-side direction of the paper matches said writing sub-scan direction, a second time required for a second copying process, which contains the time required for the reading process, the time required for a rotation process of the image data, and the time required for an image forming process on the paper that is fed in said second direction, based on the accepted copy settings;
• determining whether the first time required for the first copying process is shorter than the second time required for the second copying process;
• making said image forming unit perform the image forming process, without making said rotation unit perform the rotation process, when the first time is determined to be shorter than the second time;
• and
• making said rotation unit perform the rotation process and then making said image forming unit perform the image forming process when the first time is determined to be not shorter than the second time.

A method for controlling a copy machine, wherein the copy machine comprises:

• a reading unit that reads an image of a document such that a long-side direction of the document is in line with a reading sub-scan direction and a short-side direction is in line with a reading main scan direction;
• a rotation unit that rotates image data acquired by reading the image of the document by said reading unit;
• an operation panel unit that accepts copy settings from a user;
• and an image forming unit that forms the image on paper based on image data acquired by reading the image of the document by said reading unit or based on the image data rotated by said rotation unit, such that a transport direction of the paper is in line with a writing sub-scan direction and a direction orthogonal to said writing sub-scan direction is in line with a writing main scan direction, said method comprising:
• calculating, in a case when the paper is fed to said image forming unit in a first direction in which a long-side direction of the paper matches said writing sub-scan direction, a first time required for a first copying process, which contains the time required for a reading process of the document and the time required for an image forming process on the paper that is fed in said first direction, based on the accepted copy settings after the operation panel unit accept the copy settings of the user;
• calculating, in a case when the paper is fed to said image forming unit in a second direction in which a short-side direction of the paper matches said writing sub-scan direction, a second time required for a second copying process, which contains the time required for the reading process, the time required for a rotation process of the image data, and the time required for an image forming process on the paper that is fed in said second direction, based on the accepted copy settings;
• determining whether the first time required for the first copying process is shorter than the second time required for the second copying process;
• making said image forming unit perform the image forming process, without making said rotation unit perform the rotation process, when the first time is determined to be shorter than the second time;
• and
• making said rotation unit perform the rotation process and then making said image forming unit perform the image forming process when the first time is determined to be not shorter than the second time.