Operating Principles STYLUS 800 Service Manual
2.4.1.3 Standby Operation
The standby operation prevents an increase in the viscosity of the ink held inside the
printhead
nozzles. This operation is performed automatically if no data is received for more than three
seconds from the last print data.
1) Counts the number of flushing operations from the last standby operation, using the combined
print counter N. And performs the flushing based on the counter value.
2) Moves the carriage to the home position.
2.4.1.4 Initial Charge Operation
‘l%is
operation, performed when initial charge mode is selected, charges the
printhead
with ink .
The operation has two modes, depending on the value held by protect counters B and C.
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Initial Charge
1) If the carriage is not at home position, returns it to home position.
2)
Performs cleaner blade - I operation.
3) Changes the gear engagement (pump drive on).
4) Performs ink absorbing operation (absorption= high).
5) Performs pressure release operation.
6) Performs ink absorbing operation (absorption= middle).
7) Performs pressure release operation.
8) Performs rubbing operation.
9) Performs micro absorbing operation.
10) Performs false absorbing operation.
11) Performs cleaner blade - II operation (including the flushing operation)
12) Moves the carriage to the standby position.
9
False Charge This operation is identical with the initial charge operation, except that the
operations for steps 4) and 6) are changed as follows:
. Moves the carriage to the false absorbing position, and performs the false
absorbing operation. Then, moves the carriage to home position after step
8).
2.4.1.5 Refresh Operation
This operation prevents an increase in the viscosity of the ink inside the
printhead,
as well as to
eliminate any ink attached to the nozzle plate surface. Refresh consists of the following operations:
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Refresh - I operation This operation is activated by the REFRESH-I signal, which outputs
every 20 seconds during continuous printing.
1) Returns the carriage to home position.
2) Moves the carnage to the flushing position.
3) Performs flushing operation.
4) Performs cleaner blade-III operation (including the flushing),
based on the value of the combined print counter N.
5) Performs false absorbing operation, if the ink level counter R
value exceeds 5600.
6) Returns to the previous state.
This operation ejects high-viscosity ink inside the nozzles when the
printing starts from the standby state.
1) Moves the carriage to the flushing position and performs flushing.
2) Starts printing operation.
This operation absorbs ink inside the cap and eliminates ink
attached to the nozzle plate surface.
1) Moves the carriage to the false absorbing position.
2) Performs false absorbing operation.
3) Resets the pump pulley.
4) Release a mechanical pressure of the pump drive mechanism.
5) Adjusts the phase with paper feeding mechanism gears.
6) Returns the carriage to the home position.
.
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Print start
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False absorbing
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Rev. A