DTF Printer Error 00025 After Installing a Drag Chain: Causes, Sensor Triggers, and How to Fix It Safely

Question

After I added a drag chain, my printer started showing error 00025. The drag chain looks free and clear, not snagging anywhere. I did break a small hook during installation, but I was still able to secure the chain. I also have pictures. What does 00025 mean, and how can I fix it?

Answer

Understanding Error 00025 After a Drag Chain Install

Error Code: 00025 (common on many DTF/DTG conversions and Epson-based platforms) is typically related to a carriage movement fault or a CR (carriage) travel obstruction / abnormal load detection. In other words, the printer believes the carriage could not move normally-either because something is physically blocking it, the movement is restricted, or a sensor/encoder signal is being disturbed while it tries to travel.

Since this began right after installing the drag chain, it strongly points to a mechanical interference issue or a cable/encoder/sensor disturbance caused by the new cable routing-even if the chain looks "free and clear."

The Most Common Causes (and Why They Happen)

1) The Drag Chain Is "Free," But the Carriage Load Is Still Higher Than Normal

A drag chain can move freely and still cause problems if:

• It adds pulling force at certain points in the carriage travel

• It binds only at the extreme ends (far left or far right)

• It twists slightly and increases resistance

• It tugs cables tighter than before

Many printers detect this as a stall/overload condition and will throw a movement error like 00025 even without a visible jam.

What to check:

• Power off the printer.

• Manually slide the carriage slowly left to right.

• Pay attention at both ends of travel (this is where chains usually pull tight).

• You're looking for a "tight spot" or a point where it suddenly feels heavier.

2) The Broken Hook Changed Chain Height or Angle

You mentioned a small hook broke, but you were able to secure the chain. This is a major detail.

That hook often controls one of these:

• Chain height

• Chain anchor point

• Minimum bend radius

• Distance from the encoder strip

• Cable slack direction

If the chain sits even a little higher/lower than intended, it can:

• rub the carriage frame,

• pull the harness into the path,

• or cause the chain to "flip" during travel.

Even a secure-looking workaround can change geometry enough to trigger 00025.

What to check:

• Ensure the chain cannot rise and touch the carriage rail, belt, or frame.

• Ensure it cannot droop into the paper path or strike the printer body.

• Make sure the chain's bend is smooth-not "kinked."

3) Encoder Strip or Encoder Sensor Disturbance

This is one of the most overlooked causes.

If the drag chain or rerouted cables:

• touch the encoder strip (the clear strip with fine markings),

• flick it,

• or shake it during movement,

...the printer can lose carriage position tracking and throw an error like 00025.

What to check carefully:

• Is anything brushing the encoder strip at any point?

• Is the encoder strip smudged from accidental contact?

• Is the chain close enough that it "whips" air against it when moving fast?

Safe cleaning tip:

• Only clean the encoder strip gently with a lint-free cloth and appropriate cleaner (many techs use mild cleaner or isopropyl alcohol sparingly).

• Do not pull or stretch the strip.

4) Cable Harness Tension or Pinching Inside the Chain

Sometimes the chain moves freely, but the cables inside are the real problem:

• pinched at the ends,

• pulled too tight,

• or bent too sharply.

This can cause intermittent connection drops to the carriage board or head, and the printer will stop mid-move and throw 00025.

What to check:

• Open the chain and confirm cables are not pinched at anchor points.

• Confirm the harness has enough slack for full travel.

• Ensure no connectors are being tugged when the carriage reaches the ends.

5) Home Position / PF Side Obstruction

A chain install can also cause the carriage to fail homing properly (especially on the right side near the capping station). If the chain or harness presses into the right-side service area, the carriage may not park correctly.

What to look for:

• Anything blocking the carriage near the capping station area

• Chain striking the printer's inner wall during homing

• Harness rubbing on the belt or pulley

Practical Fix Sequence (Most Effective Order)

1. Power off and manually move the carriage end-to-end slowly

   • Find any tight spots and identify where the chain pulls.

2. Check both extreme ends of travel

   • Most "looks fine" chains bind only at the far left or far right.

3. Restore the original hook geometry as closely as possible

   • If the broken hook was a designed anchor, the best fix is usually replacing or recreating it with the correct position and height-not just "securing" it.

4. Confirm cable slack and bend radius inside the chain

   • No pinching, no sharp bends, no pulling on connectors.

5. Inspect encoder strip clearance

   • Nothing should touch or brush it-ever.

If the error persists even after correcting chain geometry, then it may have exposed a pre-existing issue (carriage friction, belt tension, encoder sensor sensitivity), but given the timing, the drag chain install is still the most likely trigger.

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. Because of this, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. We do offer an in-person evaluation and repair service through our local diagnostic facility at Printer Repair Service (https://bchtechnologies.com/printer-repair-service). Due to strong demand, we operate on a first-come, first-served basis, so it may take a few weeks before you're able to bring your printer in for drop-off. Our service is set up to repair either the entire printer or specific components, with clear instructions on how to proceed.

That said, we understand our rates may not be the most budget-friendly option, so we strongly encourage self-guided research first. You can start by checking YouTube or visiting our BCH Technologies YouTube channel homepage (https://youtube.com/@bchtechnologies). Use the search icon next to "About" on the right-hand side of the menu bar to find relevant videos. I receive many questions every day asking for a video on a specific issue, and after creating content for more than nine years, it's difficult to remember every single one-so YouTube's search tool is the fastest method. You may also get recommended videos from other channels that match your exact symptoms.

Thank you again for reaching out, and we truly appreciate your support. I hope this gives you a clear understanding of what error 00025 usually indicates and why a drag chain install-even when it appears unobstructed-can still trigger a carriage movement fault if the hook/anchor position, cable slack, or encoder clearance is slightly off.