WILLETT 430 - Clean Stop Jet Sequence

430 Ink Jet Printer Service and Maintenance Manual
94
Issue 2
Part No. 306-0430-102
Clean Stop Jet Sequence
When the clean stop jet sequence is initiated the following automatically takes place:
1
EHT switched off.
2
Ink system pressure increased to 4 bar (
Figure 45
).
3
Wait 5 seconds - modulation and phasing switched off.
4
Bleed valve V12 is switched on.
5
Wait 1 second - flush valve V7 opens.
6
Wait 1 second - ink feed valve V6 closes (
Figure 46
).
7
Wait 5 seconds - bleed valve V12 closes.
8
Wait 2 seconds - bleed valve opens.
9
Jet feed valve V11 closes.
10
Wait 500 ms - gutter valve V8 and flush valve V7 closes.
11
Wait 500 ms - bleed valve V12 closes.
12
Wait 500 ms - bleed valve V12 and flush valve V7 are switched off (
Figure 47
).
13
Wait 500 ms - gutter valve is switched on
14
Wait 20 seconds.
15
Gutter valve is switched off.
16
Pumps switched off.
GUTTER
Figure 45 Clean Stop Jet Sequence – Pressurise Flush Pump