Canon BJC 6000 Service Manual - Page 78

Print Drive Method Multi-drop, forward direction, 4.2 Print drive method

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Part 4: Technical Reference BJC-6000 1.4.2 Print drive method The head can be driven in one of the following six drive methods: 180 x 180 dpi (large dot), 360 x 360 dpi (large dot), 360 x 360 dpi (multi-drop drive), 360 x 360 dpi (largelarge dot), 720 x 720 dpi (small dot), and 1440 x 720 dpi (small dot) with the drive method differing depending on whether printing is in the forward or reverse direction. The Block ENABLE, Even/Odd ENABLE, and Heat Select signals are used to select the heater(s) to turn on in the head nozzles. Note that the head type (Black BJ cartridge, Color BJ cartridge or Photo BJ cartridge) does not influence the type of print drive method. a) 360 x 360 dpi (multi-drop drive, forward direction) control mode In the multi-drop control mode, two nozzles 8 nozzles apart are driven (one large drop driven and the other small drop driven) to print the large and small dots at 1/360-inch intervals. 1) Depending on the Odd/Even and Block ENABLE signals, nozzles No. 8 and No. 16, 8 nozzles apart, selected, using the Heat Select signals, nozzle No. 8 will be heated by the large heater, and No. 16 by the small heater. 2) The nozzles next to No. 16 and No. 8, No. 15 and No. 7, will be heated similarly. 3) After nozzles No. 8 through No.1 have been heated by the large heater and nozzles No. 16 through No. 9 by the small heater, No. 8 through No. 1 will be heated by small heater and No. 16 through No. 9 by the large heater. L L HHSSEELL11AB001((61rfre51oa4Ln1r3Lt)1)2L11L10LS9LS186LS17S5S16S4S15S3S14S2S131SS12S0L91SL8SL7L6L5L4HHL3SS2EE1LL22AB00HH((SSrfreEEoaLLnr11t))AB111((6rf1re5o1a4nL1rt3)L1) 2L11L10LS91LS861LS75S1S64S1S53S1S42S1S31S1S20SL91SL8SL7 6 L 5 L HSEL2A1(rear) HSEL2B1(front) 4 3 L2 L1 L L Carriage (left) Carriage (right) 1/720 [inch] 1/720 [inch] 1/720 [inch] 1/720 [inch] 1/720 [inch] 1/720 [inch] Direction of Carriage movement Carriage (left) Carriage (right) Latch ODD EVEN BENB0 BENB1 HSEL1A0 HSEL1B0 HSEL2A0 HSEL2B0 HSEL1A1 HSEL1B1 HSEL2A1 HSEL2B1 Large dot (L) Small dot (S) 87654321 16 15 14 13 12 11 10 9 16 15 14 13 12 11 10 9 87654321 Figure 4-5 Print Drive Method (Multi-drop, forward direction) 4-6

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1.4.2 Print drive method
The head can be driven in one of the following six drive methods: 180 x 180 dpi (large
dot), 360 x 360 dpi (large dot), 360 x 360 dpi (multi-drop drive), 360 x 360 dpi (large-
large dot), 720 x 720 dpi (small dot), and 1440 x 720 dpi (small dot) with the drive
method differing depending on whether printing is in the forward or reverse direction.
The Block ENABLE, Even/Odd ENABLE, and Heat Select signals are used to select
the heater(s) to turn on in the head nozzles.
Note that the head type (Black BJ cartridge, Color BJ cartridge or Photo BJ cartridge)
does not influence the type of print drive method.
a) 360 x 360 dpi (multi-drop drive, forward direction) control mode
In the multi-drop control mode, two nozzles 8 nozzles apart are driven (one large
drop driven and the other small drop driven) to print the large and small dots at
1/360-inch intervals.
1) Depending on the Odd/Even and Block ENABLE signals, nozzles No. 8 and No.
16, 8 nozzles apart, selected, using the Heat Select signals, nozzle No. 8 will be
heated by the large heater, and No. 16 by the small heater.
2) The nozzles next to No. 16 and No. 8, No. 15 and No. 7, will be heated similarly.
3) After nozzles No. 8 through No.1 have been heated by the large heater and
nozzles No. 16 through No. 9 by the small heater, No. 8 through No. 1 will be
heated by small heater and No. 16 through No. 9 by the large heater.
Part 4: Technical Reference
BJC-6000
4-6
Figure 4-5
Print Drive Method (Multi-drop, forward direction)
1/720 [inch]
1/720 [inch] 1/720 [inch]
HSEL1A0 (rear)
HSEL1B0 (front)
HSEL2A0 (rear)
HSEL2B0 (front)
Carriage (right)
1/720 [inch] 1/720 [inch] 1/720 [inch]
HSEL1A1(rear)
HSEL1B1(front)
HSEL2A1(rear)
HSEL2B1(front)
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Direction of Carriage movement
Carriage (left)
Carriage (right)
Carriage (left)
Large dot (L)
Small dot (S)
Latch
ODD
EVEN
BENB0
BENB1
HSEL1A0
HSEL1B0
HSEL2A0
HSEL2B0
HSEL1A1
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HSEL2A1
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