| 摘要 |
PROBLEM TO BE SOLVED: To write a desired color image while enhancing the image quality by driving each spray gun independently based on a prestored measurement data of the moving distance in the Z axis direction between an image to be written and each spray gun head. SOLUTION: A data is measured at a plurality of coordinate points within a desired writing range on an image to be written and a desired writing face distance in the Z axis direction is measured for desired writing speed and a plane to be written. The measurement data is previously compared with a driving capacity data at a decision section 65 and used only when a decision is made that it can drive a head. A Z axis drive control section 511 and a writing control section 510 control driving of a spray gun head 504 based on the measurement data and a set data. A specified quantity of color ink is then ejected from the spray gun head 504 such that a density based on an image data is attained. All spray heads 504 are subjected to the control operation and an image is written at a writing point with a specified color tone by superposing color inks from all spray guns. |
