Slow Feeder Metal
The Slow Feeder Metal is CremaLoop’s aluminium-bodied, battery-powered slow feeder. A rotating feeder disc meters coffee beans onto your grinder’s burrs a few at a time, with intelligent motor control - stopping beans from “popcorning”, lowering retention, and giving a steadier, more repeatable grind.
At a glance
Section titled “At a glance”| Parameter | Specification |
|---|---|
| Type | Battery-powered, variable-speed electric slow feeder |
| Power input | USB-C, 5 VDC, 1 A |
| Battery | Li-Ion 3.7 V, 2000 mAh |
| Battery runtime | Up to ~20 hours (speed dependent) |
| Charging time | ~3 hours |
| Feed rate (25 g beans) | 60–120 s |
| Bean capacity | 50 g |
| Auto-sleep timer | 3 minutes |
| Operating temperature | 0–40 °C |
| Dimensions | 100 × 86 × 120 mm (3.9 × 3.4 × 4.7 in) |
| Weight | 700 g / 1.5 lbs |
| Materials | Aluminium with surface coating, borosilicate glass |
| User manual | v2.1 (issue 01.04.2026) |
What’s in the box
Section titled “What’s in the box”- Slow Feeder Metal
- Glass bean container
- Slow Feeder grinder adapter
- USB-C charging cable
- User manual
- Optional: Single Dose Bellow & Lid
What it does
Section titled “What it does”- Stops popcorning. Beans are released onto the burrs gradually instead of all at once - quieter, cleaner, more consistent.
- Lowers retention. Less bean chaos means fewer grounds left behind between doses, so single-dosing is more accurate.
- Variable speed. A 0–9 dial sets the feed rate, with an automatic anti-stall routine that clears bean jams on its own.
- Charge it first - see Charging & battery.
- Fit the adapter for your grinder - Install on your grinder · Grinder compatibility.
- First use - fill, seat the glass, and run - First use.
Controls, use & maintenance
Section titled “Controls, use & maintenance”- Controls & LED indicator - power button, speed dial, and what the LED means
- Charging & battery
- Cleaning the feeder disc
- Cleaning the glass container
Grind by weight (beta)
Section titled “Grind by weight (beta)”With the grind-by-weight beta firmware and a BOOKOO Themis or Themis Mini scale (Acaia scales experimental), the Slow Feeder Metal can dose by weight: it stops when the ground coffee in the cup reaches your target, typically within ±0.1 g. Wave 3 and newer use the 2.3_GBW beta; Wave 1 & 2 use the 1.4_GBW beta, controlled with the power switch and dial. See the Grind by weight guide.
User manual
Section titled “User manual”All manuals are also in the Manual library.
Support & warranty
Section titled “Support & warranty”Manufacturing defects are covered for 12–24 months from delivery (depending on country). For support, email support@cremaloop.com - photos or a short video help us diagnose. See also Troubleshooting and Contact us.
Manufacturer: 3D Farmer GmbH, Klosterstrasse 17, 8406 Winterthur, Switzerland.