Canon BJC-6000 Technical Information PDF herunterladen (Seite 77)

b) Color/Photo BJ cartridge control

The Color/Photo BJ cartridge has 144 (48 x 3) nozzles. Each nozzle has two heater

boards in an array, large and small, one in front, the other in the rear. The front

and rear two heaters will be controlled to provide multi-drop driving, with both

driven simultaneously to discharge a large drop, or with only the small one driven to

discharge a small drop. The head's 144 nozzles are divided into 9 blocks (16 nozzles

per block), with all blocks driven simultaneously, with one nozzle per block in the

High Speed/Standard mode (for speed), or 18 nozzles per block in all other cases.

The Heat ENABLE signals (HENB 0, 1, 2, 3) are the heater board's drive control

signals. These signals are always fed to the head during printing, using the Block

ENABLE signals (BENB 0, 1), Even/Odd ENABLE signal (Even/Odd ENB), and the

Heat Select signals (HSEL1A0, 1A1, 1B0, 1B1, 2A0, 2A1, 2B0, 2B1) to select the

heaters to turn on. HENB 0 and 2 drive the Photo BJ cartridge's rear heater while

HENB 1 and 3 drive its' front heater. HENB4 drives the Color BJ cartridge's rear

heater, and HENB 3 drives its' front heater. A Heat ENABLE signal consists of a pre-

pulse and main pulse so that heater drive pulse width can be adjusted according to

the monitored head rank and internal temperature, etc., to always ensure optimum

ink discharge.

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BJC-6000

Part 4: Technical Reference

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Canon BJC-6000 Technical Information Seite 77