Herb Grinder ROPI with Stash Chamber V4

🚀 The most advanced ROPI grinder yet — refined design, durable build, flawless grinding, and easy printing.

⚠ Note: This is the latest and fully refined version of the ROPI grinder. If you want the best combination of design, durability, and grinding performance, you’re in the right place.

Why V4 Stands Out

• This is the best 3D-printed grinder you can get!

• Developed and tested daily since August 2022

• Magnet-based design that feels amazing and works flawlessly

• Excellent grinding performance – stash is ground into perfectly sized pieces without clogging

• Extremely durable – all parts reinforced to resist impact

• Comfortable and easy to use

• Top chamber for convenient stash storage

• Easy to print — parts are designed for printing without supports

• Three compartments: grinding, ground material, and stash

• Color-swap logo option - no mmu needed

Printing Recommendations

• Material: PLA (PETG works as well; PLA recommended for lower inhalation risk)

• Supports: Not required

• Layer height: 0.2 mm

• Infill: 20%

• Scarf joint: everywhere, including inner perimeters

• If bed adhesion issues occur: use the top part with integrated brim (can be trimmed off)

• Visual flair: try octagram spiral or Hilbert curve patterns on top/bottom layers

Optional Color Logo Printing - No MMU needed

• For a colored ROPI logo, switch filaments when using 0.2 mm layer height:

• Bottom & top cover: switch at layers 6 and 9

• Top part: switch at layers 88 and 91

• Middle part: no filament changes needed

Parts to Purchase

Neodymium magnets 5 mm × 2 mm (10 pieces)
Available locally or online (e.g., Amazon for example here).

Clean-Up & Assembly

• Clean with an iron brush

• Use a heat gun to remove stray threads

• Trim imperfections with a scalpel or knife

Inserting magnets:

• Use a screwdriver with a flat bit surface

• Attach the magnet to the screwdriver tip

• Apply a small drop of glue

• Push the magnet into place while holding the screwdriver handle

Something to Keep in Mind

• High-quality STL files exported from Fusion 360 are included

• If you enjoy this model, please download, test, and leave a comment — I read and reply to all. A like is also appreciated!

Community & Licensing

• Remixing and personal use are allowed

• For commercial use (e.g. representing a brand, organization, or festival), please
  contact [email protected]

• We are also open to commercial partnerships to promote and sell the grinder