Coin Dust Collection Box: Setup Guide & Filter Care

The RTP3D Coin Dust Collection Box encloses your coin on the laser bed and pulls the brass dust from embossing and deep engraving straight into your exhaust. This guide covers both versions (Standard and Filter), from unboxing to running a batch of coins, plus our optional 4" blast gate. Most people are set up in about 10 minutes.

Standard or Filter?

• Standard: a slim vent bracket that goes straight from the box to your hose. Best if you already run a filtered fume extractor.
• Filter (MERV 13): the bracket has a slide-out filter tray that holds a MERV 13 pad to catch brass dust before it reaches your hose and fan. The filter pad itself is not included (see Filter care below).

Everything else (housing, slider, base plate, knobs) is the same in both.

What's in the box

• Slide-on housing with the finger-loop slider (one housing fits every coin up to 50 mm)
• Base plate for the coin size you chose
• Vent bracket (xTool, 4" or combo). Filter version: with the slide-out filter tray
• Six thumbscrew knobs with M4 screws already installed (4 for the base plate, 2 for the bracket)
• Blast Gate versions: the 4" blast gate, its blade and the open-seal cap

Not included: MERV 13 filter pad, coins, hoses, duct, clamps or fan. The coin in these photos is shown for reference only.

Coin and filter pad shown for reference only. Not included.

What you'll need

• An exhaust fan. Use your laser's exhaust, an inline fan (a 4" AC Infinity works great) or a fume extractor.
• Hose or duct. Use the stock xTool exhaust hose, or 4" flex duct with a hose clamp.
• Filter version: MERV 13 filter media. Cut a 94 × 94 mm square from any cut-to-fit MERV 13 media.
• Your coin blanks.

Step-by-step setup

1. Load the filter tray (Filter version)

Cut a 94 × 94 mm pad from your MERV 13 filter media and press it into the recessed pocket on the open side of the tray. The grid on the back of the tray keeps the pad from being sucked through. Slide the tray down into the slot in the vent bracket, pad side facing the housing. The pull tab sits on top, so you can lift it out to swap pads. Standard version: skip to step 2.

2. Bolt down the base plate

Set the base plate on your laser's bed and line up its four corner holes with the bed holes. The M4 screws come already installed in the thumbscrew knobs. On the xTool F1 Ultra and F2 Ultra, thread a knob into each corner on the 35 mm grid, finger-tight. The coin pocket goes through the plate, so the coin sits directly on the metal bed.

Generic fiber/MOPA lasers: the plate also has M5 holes on a 25 mm grid. If you need M5 knobs, leave a note at checkout.

3. Mount the vent bracket

Slide the pocket at the bottom of the bracket over the tongue on the end of the base plate. That locks the two together. Then thread the two bracket thumbscrew knobs into the bed.

4. Connect your exhaust

• xTool bracket or combo nose: push the stock xTool exhaust hose cuff onto the nose, the same way it fits on the back of the machine.
• 4" bracket or combo: slide 4" flex duct over the 100 mm outlet and clamp it behind the raised bead.

Tip: if your fan also serves another machine through a Y-splitter, put a blast gate on the branch you aren't using. An open branch steals most of the suction. See the blast gate section below.

5. Place the coin and focus

Drop the coin into the pocket so it sits flat on the bed. Focus on the coin's surface and frame your design in xTool Creative Space (or your laser software) now, while the coin is still open to view.

6. Slide the housing on

Slide the housing onto the base plate's dovetail from the end opposite the bracket, and push until it clicks. The round spigot on the back seats into the bracket's port, so the whole air path is sealed from the coin to your fan.

7. Set the side vent

• Open (recommended): pull the finger loop to slide the slider open. Fresh air enters through the side vent and sweeps straight across the coin face, which gives the most even dust pickup.
• Closed: push the slider in until the loop meets the housing. All of the air is pulled down through the top opening, right through the beam path.

The slider has no lock, so it slides all the way out if you pull past open. That makes it easy to clean; just slide it back into its channel.

8. Run the job

Turn the fan on (high is fine) and run your engraving. The top opening is sized to the laser's beam path, so it doesn't clip the beam at lens distances of 150 to 500 mm with the coin centered. Leave the fan running for a few seconds after the job finishes.

9. Remove the coin

Slide the housing back off the dovetail and lift the coin out using the finger notches in the base plate. To run a batch, drop in the next coin and slide the housing back on. The base plate never moves, so every coin lands in the same spot.

Optional: 4" blast gate

The blast gate fits any 4" (100 mm) inline duct, splitter or fitting. If one fan serves two machines through a Y-splitter, it lets you shut off the branch you aren't using so all the suction goes where you need it. Need a different size? Email info@rtp3d.com.

1. Fit it: slide the gate's socket end onto the 4" duct, splitter branch or fitting until it bottoms out. It's a snug friction fit.
2. Lock it: tighten a 4" hose clamp around the socket so it can't pull off.
3. Connect the duct: slide your 4" duct over the other end and clamp it behind the raised bead.
4. Use it: push the blade in until its face plate seats against the gate to close the line, pull it out to open it. The blade fills the slot, so it slides smoothly without rattling.

Open-seal cap: when you want the line fully open, pull the blade all the way out and push the open-seal cap into the slot instead. The airway stays completely clear and the slot is sealed, so nothing leaks in through the gap. Swap the blade back in when you want to close the line again.

Filter care

• Filter pads (not included): cut a 94 × 94 mm square from any cut-to-fit MERV 13 filter media. It's sold in rolls and sheets online and at hardware stores, and one 24" × 96" roll makes about 60 pads.
• Check the pad every few jobs. Swap it when it's visibly discolored or you notice the suction dropping. Brass dust loads it faster at higher fan speeds.
• Watch for scorch marks. If you ever see them on the pad, turn the fan down a notch or add a metal mesh screen ahead of the pad.
• Dispose of dirty pads and collected dust in a bag. Don't blow them out with compressed air.

FAQ

Does it come with a coin?
No. Coins are not included. The coins in the photos are shown for reference only.

Does the Filter version come with a filter pad?
No. The Filter version includes the slide-out filter tray; you supply the MERV 13 media and cut a 94 × 94 mm pad.

Standard or Filter, which should I get?
If your exhaust already runs through a filtered fume extractor, Standard is all you need. If it goes to an inline fan or straight outside, get the Filter version so the brass dust is caught first.

Will the fan hurt my laser?
No. The box only pulls air through its own top opening and side vent. It doesn't touch the lens or laser head, and the coin sits in its pocket where the airflow can't move it.

Which coin sizes are available?
32 mm, 40 mm and 50 mm. The housing fits all of them; only the base plate changes. To run more than one size, grab extra base plates and swap them in: loosen the four knobs, change the plate, tighten them back down. Need a different size? Email info@rtp3d.com.

Can I run my fan at full speed?
Yes. More airflow means better pickup. Just check the filter pad more often.

Which lasers does it fit?
The xTool F1 Ultra and F2 Ultra (M4 on the 35 mm grid), and generic fiber/MOPA lasers with M5 holes on a 25 mm grid.

Shop the Coin Dust Collection Box →
Shop the 4" Clamp-On Blast Gate →

Designed and made in Jacksonville, FL by Ready to Print 3D, a veteran-owned and operated shop.