Abstract/Background:
Ink supplies and printheads are held at predetermined Reservoir and Weir Vacuum setpoints that can vary system to system. The Reservoir Vacuum setpoint is typically -10 to -13 kPa. The Reservoir Vacuum Pump RPMs--visible in the Pump Info section of the Home Page of the web interface--are expected to be in the 50-200 RPM range most of the time. This stable condition will get disrupted if Circulation is turned off, which is required when a printhead is replaced. These steps can help recover from a leaking or weeping state after Circulation in the Ink Supply is reestablished.
Symptom(s):
The Reservoir Vacuum feedback is significantly lower than the setpoint, and/or the Vacuum Pump RPMs are elevated in the 500-1000 range, or even running all-out at 3300-3600. All printheads on this color may be dripping ink.
Potential Solutions:
1. The first option is always to do a Purge and a Wipe and monitor the Reservoir Vacuum [kPa] and Pump [RPMs].
2. If a Purge/Wipe does not allow the Reservoir Vacuum to recover and stabilize, try lowering the Reservoir Vacuum Setpoint to about -7.0 or -8.0 kPA (must still be more negative than the Weir Vacuum Setpoint!) and Purge again to see if the vacuums hold steady at that level. If so, step the Reservoir Vacuum Setpoint up (more negative) by 0.5-1.0kPa at a time, waiting 30 seconds in between value changes. Keep raising the Reservoir Vacuum Setpoint until you get back to the original setpoint, then Purge and Wipe once more to ensure it maintains vacuums.
3. If standard duration purges does not work, a longer purge may give the SG1024 printhead enough time to stabilize.
4. If longer purges do not work, Main SmartTile versions (shown in the top right corner of the Web Interface pages) of 1.9.1 and newer have a "Reservoir Purge" option on the Settings which also forces ink through the printhead from the Reservoir chamber. A shorter Purge Duration should be used any time this option is used because a lot of ink is used.
5. If none of this works, turn Circulation back off, generate a Splashtop code, and send it in a new ticket for PPSI to remote in and assist.
Additional/Related Information:
SG1024 Product Manual: https://ppsihelp.freshdesk.com/a/solutions/articles/27000072266
Flushing SG1024 Printheads: https://ppsihelp.freshdesk.com/a/solutions/articles/27000022147
Replacing SG1024 Printheads: https://ppsihelp.freshdesk.com/a/solutions/articles/27000038337
Clearing Stuck Jets on SG1024 Printheads: https://ppsihelp.freshdesk.com/a/solutions/articles/27000024521
If you have other problems not listed here, or additional questions on how to diagnose/identify these items, feel free to start a new Support Ticket and an Agent will reach out to you shortly! Emailing support@prototypesys.com will automatically create a new Ticket in the Freshdesk system.