Epson Printer Error 00031 Caused by Drag Chain Issues: Causes and Fixes

Question:
I need help with my drag chain. It doesn't move smoothly and is causing error 00031. When I disconnect the tubing and drag chain, the printer powers on without any errors. However, when it's hooked up, the drag chain bounces and hits the top black cover, sometimes catching an edge and jamming. I also noticed plastic shavings at the pivot points. Would applying lubricant help, or is there another solution?

Answer:

Understanding Error 00031

Error 00031 typically indicates a carriage movement obstruction. The printer detects that the carriage cannot move freely across the rail, and in your case, the drag chain is the culprit. Since the error disappears when the drag chain is disconnected, it confirms that the binding or jamming of the drag chain is restricting carriage motion.

Why the Drag Chain Jams

• Wear and tear: The plastic shavings you noticed are a sign that the drag chain's pivot joints are grinding against each other. Over time, this can increase resistance.

• Alignment issues: If the chain is not seated correctly in its guide or rail, it may bounce, twist, or hit the printer's cover. Even a small misalignment can cause significant interference.

• Tubing tension: If the ink tubing inside the chain is too tight or improperly routed, it can force the chain to pull unevenly, leading to jams.

Possible Fixes

1. Inspect and clean the chain: Remove the drag chain fully and inspect for cracks, broken links, or excessive wear. Clean out any plastic shavings, dust, or debris.

2. Check alignment and mounting: Ensure the chain is mounted flush in its tracks, with no high points that can hit the top cover. Look for bent brackets or loose mounting screws.

3. Re-route tubing: Make sure the ink tubing inside the chain has enough slack to bend naturally. Over-tight tubing will cause resistance and stress at the pivot points.

4. Lubrication caution: While you mentioned lubrication, most drag chains are designed to run dry. Adding oil or grease can attract dust and create more grinding in the long run. If lubrication is attempted, use only a very light, dry silicone spray, and avoid oversaturating the pivot points.

5. Replace the drag chain if needed: If excessive wear is present, replacement is often the most reliable solution. A worn or warped drag chain will continue to jam no matter how much you clean or adjust it.

Best Practices

• Test movement by manually sliding the carriage with the printer off after reinstalling the chain. It should glide smoothly with minimal resistance.

• If bouncing continues, add small adhesive guides or spacers to keep the chain level and prevent it from striking the cover.

• Always ensure tubing inside the chain is not twisted, pinched, or rubbing excessively at bends.

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. So, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. We offer an in-person evaluation and repair service via our local diagnostic facility (https://bchtechnologies.com/printer-repair-service). Given the high demand, we operate on a first-come, first-served basis. It may take a few weeks before we can service your printer once dropped off. Our work covers both complete printer repairs and part-specific jobs, with clear instructions on next steps. That said, we know our rates are not always the lowest. This is why we recommend that customers also look into self-help solutions by searching online or visiting our YouTube channel homepage (https://youtube.com/@bchtechnologies). Use the search function on the channel to find detailed guides, or explore other related videos that YouTube recommends.

Thank you again for your patience and for allowing us to help. We truly value your trust and continued support.