Roaster School - Season 2 - Episode 1

TL;DR

Learn the fundamentals of commercial coffee roasters, including the components of the machine and the different types of heat used in the roasting process.

Transcript

hello and welcome to another season a reboot of roaster school here at Mill City Roasters I'm Joe Morocco and I'm gonna take you through a whole new season of a bunch of new information that also goes back and revisit some of the old information on the roaster schools that we have already covered and with me here today is our founder Steve green ti... Read More

Key Insights

• 🥵 Roasting machines consist of a rotating drum, a heat source, and airflow to transfer heat and energy to the coffee beans.
• 🍠 Convection and conduction heating are two primary methods used in coffee roasting to achieve desired flavors and roast levels.
• 🥵 Mill City Roasters offers advanced controls, including air adjustment and variable drum speed, to give roasters more precision in managing heat and airflow.
• 🫘 Temperature probes, such as the bean temperature probe and environmental temperature probe, provide critical data for monitoring and controlling the roasting process effectively.
• 🍠 The profile curve on the roasting chart serves as a visual aid to track and analyze the roast progression, helping to replicate successful roasting profiles.
• 🗯️ Personalization and experimentation are essential in finding the right roast profile for different types of coffee beans, batch sizes, and desired flavors.
• 🎮 The temperature controller probe should be preheated to ensure accurate temperature readings and to maintain temperature stability throughout the roasting process.

Questions & Answers

Q: What prompted the creation of roaster school and the free information provided by Mill City Roasters?

The founders noticed that many new roasters were not achieving good results due to lack of knowledge, so they enlisted the help of experts to guide customers through the roasting process for better coffee quality.

Q: Why is airflow management important in coffee roasting?

Airflow control affects the transfer of heat to the coffee beans. Adjusting airflow can increase or decrease heat delivery, influencing the flavor profile and roast quality.

Q: How do temperature probes work in roasting machines?

Temperature probes, such as the bean temperature probe and environmental temperature probe, measure the heat of the beans and the air inside the drum. These readings help roasters make adjustments and maintain temperature stability throughout the roasting process.

Q: Why is it recommended to preheat the drum to the temperature set by the controller?

Preheating the drum allows for a more accurate control of temperature during roasting. The temperature controller probe is placed in the center of the drum, away from airflow, ensuring consistent temperature readings.

Key Insights:

• Roasting machines consist of a rotating drum, a heat source, and airflow to transfer heat and energy to the coffee beans.
• Convection and conduction heating are two primary methods used in coffee roasting to achieve desired flavors and roast levels.
• Mill City Roasters offers advanced controls, including air adjustment and variable drum speed, to give roasters more precision in managing heat and airflow.
• Temperature probes, such as the bean temperature probe and environmental temperature probe, provide critical data for monitoring and controlling the roasting process effectively.
• The profile curve on the roasting chart serves as a visual aid to track and analyze the roast progression, helping to replicate successful roasting profiles.
• Personalization and experimentation are essential in finding the right roast profile for different types of coffee beans, batch sizes, and desired flavors.
• The temperature controller probe should be preheated to ensure accurate temperature readings and to maintain temperature stability throughout the roasting process.
• Roasting is a sensory-driven process, and the profile chart serves as a roadmap to understand how different roasting variables and techniques impact coffee flavor and quality.

Summary & Key Takeaways

• Commercial coffee roasters consist of a rotating drum, a heat source, and airflow to transfer heat to the coffee beans.

• Different types of heat used in coffee roasting include convection heating (heated air surrounding the coffee) and conduction heating (point-to-point contact with the drum).

• Roasting machines, like those from Mill City, offer controls for precise heat management, including air adjustment, variable drum speed, and temperature probes.