How to Safely Unclog and Prime Epson ET-8550 Printheads for DTF White Ink

Question:
I saw a video about unclogging and priming the Epson ET-8550 printhead, but I'm unsure about the "5-10 PSI" reference. What exactly does this mean, and is it safe for my printer?

Answer:

Regarding your Epson ET-8550 and the "5-10 PSI" guidance: this refers to the safe pressure range for priming or unclogging the printhead. Maintaining appropriate pressure is crucial because Epson printheads are delicate, and excessive force can cause permanent damage. For context:

• Epson printheads normally operate around 20 kPa and can peak at 40 kPa, which is approximately 5.8 PSI.

• Briefly running the system at around 5 PSI is generally safe.

• Pressures approaching 10 PSI are high and can risk damaging the printhead, so we generally recommend staying in the 3-6 PSI range and adjusting based on the age and condition of your printhead.

Here's a quick reference chart for converting kPa to PSI:

• 20 kPa ≈ 2.90 PSI

• 30 kPa ≈ 4.35 PSI

• 40 kPa ≈ 5.80 PSI

• 50 kPa ≈ 7.25 PSI

• 60 kPa ≈ 8.70 PSI

• 70 kPa ≈ 10.15 PSI

• 80 kPa ≈ 11.60 PSI

• 90 kPa ≈ 13.05 PSI

• 100 kPa ≈ 14.50 PSI

This chart can help you understand safe operating pressures relative to the manufacturer's specifications. When priming or unclogging with white DTF ink, staying within the lower PSI range reduces the risk of damaging delicate nozzle structures.

For further visual guidance, you can watch our video here: Safely Unclog and Prime Epson ET-8550 Printhead [https://www.youtube.com/watch?v=4jtiISlOFzU&lc=UgxZW5iAmS6BrzgibWV4AaABAg].

Addressing printer issues can be complex due to the hands-on nature of the work. We are not able to provide remote troubleshooting or support for repairs. However, we do offer in-person evaluation and repair services through our local diagnostic facility: BCH Technologies Printer Repair Service [https://bchtechnologies.com/printer-repair-service]. Due to high demand, scheduling may take a few weeks. Our services can handle either full printer repairs or specific parts, with clear instructions provided.

Since professional services may not always be the most cost-effective, we recommend self-help through online research. Start by exploring our YouTube channel [https://youtube.com/@bchtechnologies] and use the search function to find videos related to your printer model or issue. YouTube may also suggest relevant videos from other creators that can help.

Thank you again for reaching out and supporting BCH Technologies. We hope this information helps you safely prime and maintain your Epson ET-8550 printhead and keeps your DTF printing running smoothly.