Coinfinity Stacker Printing Instructions

🧱 Coinfinity Stacker Overview All Coinfinity Stackers follow the same print and assembly process. The only difference between them is the internal coin tube diameter and corresponding outer diameter (OD).

There are currently 6 stacker variants, covering a wide range of precious metal coin sizes. Each stacker consists of two parts — a Cap and a Tube — that twist together securely after printing.

🛠️ How to Assemble Print the Cap and Tube with your preferred material (PLA or PETG recommended) Install 25 mm × 4 mm ceramic magnets into the recesses of both parts Insert your NFC-enabled badge into the side slot of the Tube Twist-lock the Cap onto the Tube Scan the badge using the Coinfinity App and track your collection!

STL Files – Buy or Print Yourself

To print the stackers, first determine which stacker sizes you want to print. You can look at the Compatible Coins list to determine which coins will fit in each stacker size.

Printing Instructions

Open Bambu Studio and import the CAP and TUBE files for each stacker size that you want to print. For illustration purposes here, we show all 6 stackers on the same build plate.

AllStackersOnPlateModels

These instructions apply to all of the stacker models.

  1. Print tubes upright (standing vertically)
  2. Print caps upside down (top side down on the build plate)
  3. Add pause for magnet insertion (optional)
  4. Face tubes forward so you can hide seams in the back
  5. No supports needed if oriented correctly
  6. Group prints: Place caps in the front and tubes in the back to track magnet polarity
  7. Insert magnets with correct polarity – see Magnets
  8. Check each model’s page for unique instructions

Quality Tips

  • Use high-quality PLA or PETG
  • Clean your build plate before printing
  • Use an enclosure if printing PETG

Slicing Setup

Build Plate Orientation

Place tubes upright and facing forward so the seam ends up on the back. Group caps and tubes for easier polarity tracking.

Example: Seam Positioning

Seam Positioning

When printing many stackers, group:

  • Caps in front
  • Tubes in back

This helps keep magnet polarities consistent (e.g., North in caps, South in tubes).

Grouped Stackers on Build Plate

Print Settings 1 Quality Settings Quality Settings Strength Settings Strength Settings Speed Settings Support Settings

Adding a Pause for Magnet Insertion

After slicing:

  1. Scroll to the layer where the magnet wells are first covered.
  2. Add a pause at that layer. The printer pauses before the layer is printed.
  3. Note the print time — so you know when to insert the magnets

At the scheduled pause (e.g., 12m 29s):

  • Carefully insert magnets
  • Ensure correct polarity
  • Avoid bumping the build plate
  • Avoid long delays before resuming the print.

Paused for Magnets Magnets Inserted

Resume the print once magnets are seated.

💡 Tip: If done quickly and cleanly, you won’t see any seam lines at the pause layer.

Magnets Covered Mid-Print

After printing, twist the lids 360° a few times to loosen the fit. It’s designed to be snug!

Skipping the Magnets

No magnets? No problem.

  • Enable supports for the magnet wells only
  • Use support blocker cubes in the badge slots, not the magnet cavities
  • Slice and preview carefully to ensure the slicer fills only the magnet wells

This approach fills the magnet wells with the same filament and avoids using magnets.

Printing an Army of Stackers

Want to print a batch?

  • Split caps and tubes onto separate build plates
  • This saves time and helps with polarity tracking
  • Organize rows consistently for large-volume production

If you have trouble you can reach out to the COINFINITY Discord server for assistance.