Symbolic Formulas: Basics, New Variables and Applications

Each Artisan input channel can be intercepted by a symbolic formula before its data is forwarded to the corresponding curve. Symbolic formulas allow to change data retrieved from the input source before it is further processed, displayed and stored in the internal data structures. In that respect, the use of symbolic formulas is usually destructive to the original data received. From Artisan v2.1 on, symbolic formulas can also be applied to the two rate-of-rise channels.

In this post we recap the basics of Artisan's symbolic formula mechanism, describe the new variables that have been added in Artisan v2.1 and explain their interplay by discussing useful applications.

Automatic Gas Control

Elvio (Mestre Cafeeiro, Brasil) is demonstrating how he uses a Phidget RC (see Artisan v1.6.1) to automate the gas control on his Atilla roaster.

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Artisan 2

Here is artisan 2!

Using Artisan Designer

An excellent video by Alan demonstrating how he uses the Artisan designer to develop roast profiles. 

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How to document sampling?

Someone just asked how to document the moments she takes samples mid-roast using the tryer?

How close?

Ever wondered how close you duplicated a previous roast profile? A standard measure in statistics to express the average error between a curve and its target is know as Mean Squared Error (MSE) which computes the average of the squares of the single discrepancies between the data values and their targets.

weight • volume • density

Knowing the density of your raw beans is key to adjust your roast profile. Knowing the density of roasted beans is important for successful blending. Keeping the bean density of a product constant helps to keep your customers happy.