Image formation apparatus, control method, and control program for calculating a speed of conveyance

A non-transitory computer-readable recording medium storing a program for controlling an image formation apparatus including a generator, the program causing the image formation apparatus to perform:

• conveying a moving element on which an image is formed;
• generating at least two images of a first image and a second image by having the generator shoot the conveyed moving element at different timing;
• sensing a first distance between the generator and the moving element at time of shooting of the first image and sensing a second distance between the generator and the moving element at time of shooting of the second image;
• correcting a size of the first image in accordance with the first distance;
• correcting a size of the second image in accordance with the second distance;
• calculating a speed of conveyance of the moving element based on an amount of change between a pattern of the corrected first image and a pattern of the corrected second image;
• and
• outputting the speed of conveyance.

An image formation apparatus comprising:

• a conveyor configured to convey a moving element on which an image is formed;
• a generator configured to generate a first image and a second image by shooting the conveyed moving element at different timing;
• a detector configured to sense a first distance between the generator and the moving element at time of shooting of the first image and sense a second distance between the generator and the moving element at time of shooting of the second image;
• and
• a hardware processor configured to:
• calculate a speed of conveyance of the moving element based on an amount of change between a pattern of the first image and a pattern of the second image;
• correct the calculated speed of conveyance in accordance with a difference between the first distance and the second distance;
• and
• output the speed of conveyance.

A non-transitory computer-readable recording medium storing a program for controlling an image formation apparatus including a generator, the program causing the image formation apparatus to perform:

• conveying a moving element on which an image is formed;
• generating at least two images of a first image and a second image by having the generator shoot the conveyed moving element at different timing;
• sensing a first distance between the generator and the moving element at time of shooting of the first image and sensing a second distance between the generator and the moving element at time of shooting of the second image;
• calculating a speed of conveyance of the moving element based on an amount of change between a pattern of the first image and a pattern of the second image;
• correcting the calculated speed of conveyance in accordance with a difference between the first distance and the second distance;
• and
• outputting the speed of conveyance.