For small-batch roasting (150 g in your 500 g drum), the Rate of Rise (RoR) schedule is what keeps the roast tasting developed (sweet, rich) rather than baked or ashy.
Because electric roasters react slowly, you want to set up a smooth declining RoR in advance. Here’s a good target RoR schedule (°C/min, approximate) for a dark roast dropped 30–45 sec into 2C:
| Phase / Time marker | Target RoR (°C/min) | Notes |
|---|---|---|
| Turning point (~1:00) | 20–25 | Strong rebound, full heat. |
| Drying end (~3:30) | 15–18 | Beans yellow, keep momentum. |
| Mid-Maillard (~5:00) | 12–14 | Start gentle decline. |
| First crack start (~7:30–8:00) | 9–11 | Avoid crash — don’t let RoR dip below ~8. |
| Mid-development (~9:00) | 7–9 | Smooth decline, sweetness builds. |
| Second crack start (~10:00–10:30) | 6–7 | Enough energy to enter 2C cleanly. |
| Drop (~10:30–11:15) | 4–6 | Declining but still positive. Don’t let RoR flatten to zero. |