Question:
I recently converted my Epson ET-8550 printer from DTF back to regular printing, but two of the inks won’t pull through. I’ve already used a syringe, and there doesn’t seem to be a clog. Do you have any advice?
Answer:
When converting your Epson ET-8550 back from DTF to regular printing, the issue often lies in the ink supply system. Since DTF inks are much thicker and higher in viscosity compared to standard inks, they can leave behind residue, particularly in the printhead mesh. This is why performing a Printhead Nipple Conversion (PNC) during the switch is typically recommended. If the PNC wasn’t performed, start by removing the dampers and thoroughly cleaning the mesh to ensure no blockages remain.
Once the mesh is cleaned, make sure the printhead is properly primed. To do this, allow the printer to power on so the printhead parks naturally on the capping station. Parking with the power on ensures the printhead is sealed correctly. Then, connect a syringe and tube to the printer’s waste line, and gently draw 2 ml of air. Start with 1.5 ml—you should feel slight resistance. If you only draw air, this indicates the printhead is not properly sealed on the capping station or that the station has a leak. If you feel complete resistance, the capping station might be clogged and will need cleaning before proceeding.
Once resistance is felt and you hear the membrane on the damper crinkle, slowly draw up to 2 ml and hold the syringe steady for 10 seconds. This process primes the nozzles and clears any air pockets. Afterward, run the printer’s regular cleaning cycle. Avoid strong cleanings within 12 hours, and allow the printer to rest between cleanings to prevent undue strain.
Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. We’re unable to provide remote troubleshooting, but we offer in-person evaluation and repair services at our diagnostic facility (BCH Technologies Printer Repair Service [https://bchtechnologies.com/printer-repair-service]). This service operates on a first-come, first-served basis, and there may be a short wait time. For self-help, our YouTube channel (BCH Technologies YouTube [https://youtube.com/@bchtechnologies]) has a vast library of troubleshooting videos, which can be easily searched to find solutions to specific problems.