Inspecting and Replacing Dampers

In a production-grade DTF printer, the dampers are the unsung heroes of your ink system. Located directly above the printhead, these small plastic components serve two critical roles: they act as a final mesh filter for the ink and regulate the pressure (dampening) of the ink flow to prevent “starvation” during high-speed passes.

Because DTF white ink contains heavy titanium dioxide, it is naturally abrasive and prone to sedimentation. Over time, the internal mesh filter of the damper becomes restricted. While we recommend a 6-month replacement cycle, heavy production environments may require this every 3–4 months.

Signs Your Dampers are Failing

A failing damper doesn’t usually stop working instantly; it fails “slowly,” which can be harder to diagnose. Look for these red flags:

• Ink Starvation: Your print starts perfectly, but one colour begins to fade or “drop out” halfway through a long roll.

• Persistent Air Bubbles: If you see air constantly returning to the ink lines despite frequent priming, the damper seal may be compromised.

• Ink Dripping From the Printhead: If you see ink dripping from the printhead during printing or machine clean down, then a damper is likely poorly seated or failing.

• Visible Sediment: If the clear plastic walls of the damper look stained or show “sludge” at the bottom, the internal filter is likely choked.

• Frequent Cleaning Cycles: If you have to run a “Head Clean” every few meters to keep the nozzles firing, your dampers are likely restricted.

Tools Required:

• New Dampers: (Ensure they are specific for i1600/i3200 heads).

• Printhead wipes: To catch any stray ink drops.

• Small Syringe: For priming the new dampers.

• Nitrile Gloves: Ink is messy and difficult to remove from skin.

The Replacement Process

1. Preparation

Press the left button on the control panel to move the carriage to the centre of the rail and power down the machine. Remove the carriage cover to expose the printhead manifold.

2. Clamp the Ink Lines

1ClickPrint printers should have small plastic clamps on the ink lines near the ink tanks. Ensure that these are clamped firmly. If you do not, ink WILL go everywhere when you disconnecct the ink lines.

2. Removing the Old Damper

Gently pull the damper upward to disconnect it from the printhead manifold.

• Pro Tip: Keep a lint-free wipe underneath as you pull it off to catch the small amount of ink that will inevitably drip from the bottom of the damper.

3. Disconnecting the Ink Lines

The ink lines are a friction fit and can usually just be pulled off the damper.

If you have problems, the ink lines can be easily cut with a pair of scissors just above the damper. 

Don’t worry, it’s a doddle to add more pipe if, over years of damper replacements, your ink lines get short.

• Pro Tip: Double check the ink lines are clamped before you remove the ink lines.

4. Priming the New Damper

Do not install a dry damper.

1. Connect your ink line to the new damper.

2. Release the ink line clamps

3. Insert a syringe (without a needle) into the bottom exit hole of the damper.

4. Slowly pull the syringe plunger to draw ink from the main tank, through the lines, and into the damper until it is roughly 70–80% full.

5. This ensures the printhead isn’t trying to “air-lock” when you restart.

5. Seating the Damper

Push the primed damper firmly onto the printhead manifold. You should feel a slight “click” or a firm seat. Ensure it is perfectly vertical; if it sits at an angle, it may leak air.

6. Head Clean and Start Printing

Run a head clean, maybe two and start printing. Keep an eye out for ink dripping from the printhead. This can be a sign of a poorly seated or faulty damper.