Canon imagePROGRAF W2200, Service Manual

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Part 3
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Technical Reference
W2200
3-2
1.2 Printing Drive Control
In this printer, the nozzles to be heated are divided into blocks, and dispersion driving is
performed. Each color is divided into 24 blocks, and each block is divided into Odd/Even. To
perform dispersion driving, the order of the driving block is designated in the printer.
The heat pulse sets the pass, double or single, by PWM driving. According to the temperature
parameter, the pulse width is modulated.
To control the ink ejection amount, the printer reads in the head characteristic data (such as
head ID driving pulse no. and Di sensor correction value) written in the print head.
Ultimately, with the combination of the Heat Enable signal, whether to heat the nozzles or not
is decided.
1.3 Control During Printing
The print data received from the computer is expanded inside the printer, and is converted to
data that matches the print mode. During data conversion, the dot in the received data is
reduced to prevent the print speed from deteriorating even when the printing is performed
using the print mode with large no. of passes.
There are several ways to reduce dots; every column, and random mask pattern or fixed mask
pattern for each of black and colors. This processing is performed by selecting the print mode.
The print modes prepared at the printer driver side and the printer side are shown below.
Print mode List Print mode List Print mode List Print mode List
Quality Quality Quality Quality Driver description Driver description Driver description Driver description
Paper Type Paper Type Paper Type Paper Type
Draft Draft Draft Draft Standard Standard Standard Standard High (quality) High (quality) High (quality) High (quality)
Plain paper 300 x 300
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dpi
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1-pass bi-directional
600 x 600
1- or 2-pass
bi-directional
600 x 600
4-pass bi-directional
Coated paper
(High resolution paper) 600 x 600
4-pass uni-directional
600 x 600
8-pass
uni-directional
Glossy paper
(Photo pro /GP-301N)
600 x 600
6-pass bi-directional
600 x 600
8-pass bi-directional
Transparency film 600 x 600
4-pass bi-directional
600 x 600
8-pass bi-directional
Glossy film 600 x 600
8-pass bi-directional
600 x 600
8-pass bi-directional
Proof paper 600x600
8-pass bi-directional
1200x1200
8-pass bi-directional
1200x1200
16-pass
bi-directional