L1800, Artisan 1430, 1440, and 1390 Capping Station: Can You Remove the Sponge Under the Grid?

Question

On an Epson L1800, Artisan 1430, 1440, or 1390 capping station, can you remove the sponge located underneath the grid and operate the capping station without that sponge?

Answer

Yes, it is physically possible to remove the sponge underneath the grid of the capping station and operate the printer without it. I personally do not normally remove it permanently, but there are situations where technicians do so, particularly when diagnosing ink-flow problems, working with heavily modified printers, or trying to prevent a saturated or swollen sponge from restricting drainage.

The important point is to understand what that sponge is doing before deciding whether to remove it.

The sponge inside the cap is not simply there as a filter. It helps distribute ink and cleaning fluid across the cap area, keeps liquid from pooling excessively in one spot, and helps create a more controlled environment when the printhead is parked on the cap. During head cleaning, ink is pulled through the printhead nozzles and into the capping station. From there, the waste pump draws that liquid through the drain tube and sends it toward the waste-ink system.

If the sponge becomes heavily saturated with dried pigment, DTF white ink, old dye ink, debris, or thickened cleaning solution, it can become a restriction. Instead of helping fluid move through the cap, it can actually slow the flow. This is especially common on printers that have been converted for DTF use because white ink contains a much higher solids content than ordinary dye ink and can leave heavy deposits in the capping station.

In those cases, removing the sponge can sometimes improve drainage. With the sponge removed, you may be able to see cleaning solution or ink move more freely through the cap and into the drain tube. It can also make the capping station easier to inspect and clean.

However, removing the sponge is not automatically an upgrade.

One potential problem is that liquid can move around differently inside the cap. Without the sponge helping spread and control the fluid, ink or cleaning solution may pool unevenly. Depending on the exact capping-station design, this can make the cap messier and may increase the chance of ink splashing, drying in certain areas, or leaving residue around the sealing surface.

The most important part of the capping station is still the rubber cap seal. When the carriage parks, the rubber perimeter of the cap needs to seal correctly against the bottom of the printhead. If that seal is poor, the pump will pull air instead of creating proper suction through the printhead. Removing the sponge will not repair a damaged, warped, hardened, or incorrectly positioned cap.

If you are troubleshooting a clog, I would therefore focus on the complete ink path rather than the sponge alone. Make sure the cap itself is clean, the rubber edge is not damaged, the drain opening is clear, the waste tube is not pinched or blocked, and the pump is actually producing suction.

A useful diagnostic test is to place cleaning solution in the cap and observe what happens. If the liquid sits there and does not drain when the pump operates, there may be a blockage somewhere in the cap, tube, or pump assembly. If the liquid immediately disappears without the pump operating, that may indicate a leak or another problem with the cap or tubing. Ideally, you want controlled flow when the pump is actuated.

You can also disconnect the waste tube at an appropriate point and gently test whether fluid can pass through it. Be careful about applying excessive pressure or vacuum. The capping station contains small fittings and flexible tubing that can be damaged or pulled loose fairly easily.

For an L1800, Artisan 1430, 1440, or 1390 being used with normal dye or pigment ink, I would generally keep the sponge if it is still clean and functioning correctly. If the sponge has become hardened, swollen, contaminated, or severely clogged, cleaning or replacing the capping station is usually preferable to automatically removing the sponge.

For a heavily modified DTF printer, however, some technicians choose to operate without the sponge because the capping station may be easier to flush and maintain that way. That can work, but you should monitor the cap carefully and make sure the printhead still parks and seals properly. DTF white ink can dry rapidly and create deposits, so regular capping-station inspection is particularly important.

Also remember that a weak cleaning cycle is not always caused by the capping station. If you have poor nozzle recovery even though the cap and drain path are open, possible causes include a weak waste pump, an air leak in the capping system, an improperly seated cap, clogged dampers or cartridges, air entering the ink supply, or an actual internal printhead blockage.

So, the short answer is: yes, you can remove the sponge, and the printer can operate without it. I personally normally leave it in place unless there is a specific reason to remove it. If removing it improves drainage, that can also tell you that the original sponge may have become a restriction. Just remember that removing the sponge does not eliminate the need for a good cap seal, an open drain tube, and a properly functioning waste pump.

Addressing printer problems like this can be complicated because capping-station and ink-flow issues are very hands-on. For that reason, we're not able to provide individualized remote troubleshooting, suggestions, or repair support for a specific printer. We do offer in-person evaluation and repair through our printer diagnostic and repair service [https://bchtechnologies.com/printer-repair-service]. Because demand is high, we operate on a first-come, first-served basis, so there may be a waiting period before we can accept a printer for drop-off. Our services are structured to repair either complete printers or certain individual parts, with instructions explaining how to proceed. We also recognize that our professional repair service may not be the most economical solution for every situation, so we strongly encourage self-help through online research when appropriate. You can begin with YouTube or visit the BCH Technologies YouTube channel [https://youtube.com/@bchtechnologies]. Use the search icon near the "About" section of the channel and search terms such as "L1800 capping station," "1430 cap station," "capping station clog," "waste pump," or "DTF capping station." We receive many questions every day asking us to locate specific videos, and after producing videos for many years, it is difficult to remember the location of every individual topic. YouTube's search function is usually the fastest way to find the relevant video, and it may also recommend helpful videos from other channels.

Thank you again for watching our videos, supporting BCH Technologies, and taking the time to ask the question. We truly appreciate your engagement and hope this explanation helps you better understand what that sponge does and when removing it may or may not be useful.