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Profile chart for Skywalker built in Profiles
bobinaz
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Posted on 10/28/2024 7:46 PM
Is there a chart for the built-in profiles of the Skywalker?

I'm looking for a pre-heat setting, a minute by minute settings of the power and fan speed. and when the cooling phase starts.

I made my own for the profile 22 but was wondering if there is something like this already made that I can use as a starting point for manual roasting. Thanks
hot air poppers
CafeGene cbr101
Skywalker Roaster
 
bobinaz
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Posted on 10/28/2024 11:45 PM
I did find the profile chart someone responded to on the FB Skywalker Coffee Roaster Group.
I have attached it here to share.
bobinaz attached the following image:
skywalker_profile_chart.jpg
hot air poppers
CafeGene cbr101
Skywalker Roaster
 
renatoa
Top  #3 Print Post
Posted on 10/29/2024 3:42 AM
Such info does exist, in the main skywalker thread, not as a grid, but numeric figures describing the basic rules for 1-2-3x profiles.
As a reminder, first digit of profile designates processing: 1=Naturals, 2=Washed, 3=Honey.
Second digit means degree of roast from 1 = light to 3 = dark. this digit controls the drop temperature only, nothing else as power/fan evolution.

So, we have:
preheat temp: N200 W220 H215
start power level: 65-70-65%
start fan: 65% for all
172C reduced power: 40-50-40%
172C increased fan: 80-90-80%

As you can see from this condensed textual description, honey profiles are almost identical to naturals, with the exception of charge temperature, 215 instead 200C.

During the roast, I rarely noticed power variations by 5%, like 65 to 70 for one minute, then back to 65.
Associated these maneuvers with insufficient speed of change rate, due probably to power-beans load correlation out of some limits. Or ambient too cool/too hot.
These 5% corrections happens at minute change, not at a specific temperature, because RoR in SKW is computed on minute basis.

The above behavior are for the first generation of Skywalkers, delivered one year ago.
Never noticed in mine some levels as seen in the grid above, as 85% fan in the development phase, for any profiles.

If they changed the auto profiles from a model to the other, then roasting on auto becomes machine version specific, so we can't share experience with other skw owners of models from other batches.
 
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