Pattern weights you dial in by weight. Set a target — say 200 g — and the

model sizes the sealed cavity to hit it with 304 stainless steel balls. No

guessing, no glue, no leaking sand. Print the two-part puck, pour in the balls,

press the lid closed. Done.

WHY THIS ONE

- Pick your weight. The cavity auto-scales to your target, anywhere from 40 to

500 g per weight.

- It tells you exactly what to buy. On Generate, the readout prints the precise

number of Bambu Lab Maker's Supply ball packs and the cost — e.g. "9 packs of

8 mm 304SS balls (90 balls) — $16.74."

- Sealed two-part design. Press-fit lid, no rattle, nothing escapes onto your

fabric.

- Multicolor-ready. The top engraving and lid are set up for a quick AMS color

swap.

- Printable reorder card. A matching credit-card-sized tag records the recipe

and sourcing so you can rebuild the exact same set months from now.

- Engineered fits. Tight clearances, and the cavity is auto-protected from being

set too shallow for the ball size you chose.

HOW TO CUSTOMIZE

Click Customize. Set your target weight and ball size — everything else (cavity,

walls, lid, engraving) has sensible defaults. Hit Generate and download. The

output readout is your shopping list.

Three views in the Layout tab:

- Print Layout — the body and lid laid out flat, ready to slice (download this).

- Assembled Preview — see the finished weight with the engraving on top.

- Spec Card — a printable reorder tag for the set.

BALLAST & SOURCING

Built around Bambu Lab Maker's Supply 304 stainless steel balls (FA-series,

10 pcs per pack). Add the matching SKU to your cart from the BOM for one-click

ordering. The same cavity also takes hardware-store steel shot, BBs, or coins if

you'd rather source it cheap — stainless is just the clean, rust-free,

fabric-safe option.

PLAN YOUR SET FIRST (OPTIONAL)

Want to compare ball sizes and cost before you print? Use the interactive Weight

Calculator: PATTERN-WEIGHT-DESIGNER

It shows pack count, cost, and the size trade-off for any target weight. Larger

balls mean fewer packs and lower cost but coarser weight steps; smaller balls

hit your target more precisely.

PRINT SETTINGS

- PLA or PETG, 0.2 mm layers, ~15% infill — the steel does the work, not the plastic.

- No supports needed. The body prints open-side up; the lid prints disc-down.

- Color-swap the top layer or lid for contrast if you run an AMS.

- Test the lid fit first. The default plug clearance is 0.10 mm — print one body

and lid and check the press fit on your printer before running a full set.

ASSEMBLY

1. Print the body and the lid.

2. Pour in the steel balls.

3. Press the lid in.

Tip: print the Spec Card once per set and zip-tie it to your bin — it's your

reorder recipe and a quick assembly checklist in one.