# Carrot-collective/ERCF_v2

Community designed ERCF v2

Repository: https://github.com/Carrot-collective/ERCF_v2
Canonical: https://ross.abutalabs.com/products/ercf_v2
License: GPL-3.0
License Family: copyleft
Last push: 2026-03-07T19:12:53+00:00

## Health v2 (maintenance only)
Score: 52/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 71, release rhythm 8, longevity 87
- inputs: {"age_days": 1219, "days_push": 179, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1954, forks 176 (observed 2026-08-28T04:05:58.889289+00:00)

## What it is
ERCF v2 is a community-designed, expandable multi-material unit (MMU) for Klipper-based 3D printers, evolving the original Voron ERCF design. The repository provides CAD files, BOMs, documentation, and firmware integration guidance (via Happy Hare) for building the hardware, including optional buffer (ERCT) and filament cutter (ERF) modules.

## Use cases
- add multi-color filament switching to a Klipper 3D printer
- build a DIY MMU for a Voron printer
- print multi-material parts without manual filament swaps
- find CAD files and BOM for the ERCF v2 filament feeder
- set up Happy Hare MMU firmware with Klipper Screen
- add a filament cutter or buffer to an ERCF setup

## When to choose
- you run a Klipper-based printer and want a community-supported, expandable MMU
- you want proven hardware designs with active community development and documentation
- you want optional modules like an integrated buffer or filament cutter

## When to avoid
- you need a plug-and-play commercial MMU with no assembly
- your printer does not run Klipper firmware
- you only need software-based filament management without hardware

## Facets
- artifact type: application
- maturity: active
- function: developer-tools
- domain: hardware, developer-tools
- platform: cross-platform
- tags: 3d-printing, mmu, klipper, hardware-design, cad, voron, multicolor-printing, filament

## Member repositories
- Carrot-collective/ERCF_v2 (main) score 52

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:58.889289+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:06:31.330277+00:00, confidence not recorded.
  - readme: https://github.com/Carrot-collective/ERCF_v2 (fetched 2026-08-28T04:05:58.889289+00:00, sha f4c2830af13e)
- Data as of 2026-08-30T08:39:29.467469+00:00.