Delivery day, step by step: what to have ready, how to inspect the crate before signing, where to uncrate, how to move 200–800 kg through a door and onto its footings, and what not to connect yet.
The gas, thermal and operator protections a commercial roaster should carry, what each one does, how to see it demonstrated in the pre-shipment test, and what happens without it.
A framework for coffee brands: what a contract roaster charges you for, what owning a machine costs beyond the machine, the volume where the lines cross, and the non-financial reasons that override it.
Contract roasting is a changeover business, not a volume business. The equipment that makes switching clients fast and safe — profile storage, destoning, packaging, sampling — and how to size it.
Rank spares by downtime cost and delivery time, not price. The nine parts that stop a roaster, what failure looks like for each, and what to order with the machine when you are weeks from the factory.
Preheat time is set by drum mass, not the clock. How to bring a roaster to a stable state, how to tell it is ready, why the first batch still differs, and what preheat costs per day.
Coffee loses 11–20% of its weight in the roaster. What that does to green purchasing, real machine output and cost per kilo, with the arithmetic and a table you can use.
Why afternoon batches run faster than morning ones, and the routine that stops it. A between-batch protocol template, how to set it for your machine, and why automation depends on it.
Tropical humidity, 45 °C summers and 2,500 m altitude each change how a roaster behaves. Green storage, burner sizing, cooling time and electronics — what to specify before you order.
The damper manages three things at once: heat transfer, chaff and smoke removal, and safety. What airflow does in drying, development and after first crack, and the mistakes it causes.
