Image correction/complementation processes such as splicing are executed in the following order.
| No. | Process | Role of process |
|---|---|---|
1 | Complement for deficient nozzle: process of thickening adjacent dots | Makes a deficient nozzle inconspicuous by enlarging the drop of ink discharged to the adjacent line. |
2 | Complement for deficient nozzle: alternate typing process | Compensates for a deficient nozzle by discharging ink from a different nozzle which is used to discharge ink for another dot in the same line. |
3 | Reduction process of banding between scans | Makes some nozzles overlap and share dots in the same line to reduce banding caused by errors between scans. |
4 | Overlap process between heads | Makes some nozzles overlap and share dots in the same line to reduce banding caused by errors between heads. |
5 | Mask generation | Generates masks used for distributing shared dots during multipass printing in units of scans and nozzles. |
6 | Interlacing | Discharges a specified amount of ink in the spaces between nozzles to compensate for the gap between the nozzle pitch and the sub-scan resolution. |
7 | 2 Bit rotation | Converts the order of the inputted image data to the order of the ink discharge by the head. |
8 | Mask process | Turns ON/OFF the discharge of each nozzle during multipass printing by applying the mask. |
9 | W data processing | W data processing means W skip data processing. |
10 | Position adjustment process | 128-boundary process of the main scan. |
11 | Mirroring process | When printing on both the forward route and backward route, mirrors the print data for the backward route. |
12 | W interpolation process for errors between rows/heads | Corrects the physical gaps between rows/heads by interpolating white dots the size of the gaps. |
13 | W skip | Skip operation of the carriage combined with the upstream W skip process. |
14 | Bit conversion | Conversion from 2-bit to 3-bit. |
15 | Discharge timing generation | Generates discharge timing signal in sync with the encoder waveform according to the image resolution. |
16 | Fine driving setting for non-ejection nozzles | Fine driving of nozzles that are not used for printing. |
17 | Correction of errors between areas/rows | Adjusts dot positions. The platen has an uneven surface which makes the gap between the platen and the paper vary, leading to errors of dots in the main scan direction. This function adjusts the discharge timing to correct dot position errors. |
18 | Head magnification correction | Corrects the manufacturing errors of heads. Image density varies depending on the discharge characteristics of the head. Applies corrective magnification to the driving waveform to adjust the image density. |
19 | Crosstalk correction | The ink discharge speed changes depending on the number of nozzles that are driven at the same time. This is a characteristic of the head driving module (crosstalk characteristic). This function keeps the ink discharge constant by applying corrective magnification to the driving waveform to correct the crosstalk characteristic. |
20 | Waveform selection based on the temperature | Selects a waveform suitable for the head temperature from the FROM mounted on the HDC board. The FROM holds a waveform suitable for each temperature between 15° to 42° in 1° steps. |
21 | Discharge waveform generation | Applies DA conversion to the drive waveform of No. 20 to generate an analog drive waveform. |
22 | Fine driving | To prevent ink near the nozzle from drying and sticking, this function applies fine drive waveform to vibrate the meniscus plane of the ink. |
23 | Idle discharge | This process discards the ink near the nozzle that has thickened through drying. Applies strong drive waveform to the head and discharges ink from the nozzle. |