Roast 3 - Auto-Drum Roaster. (Air Roaster) Colombian Huila

 This is a Heller Air Fryer that I'm experimenting with to use as a coffee bean roaster.

It's a cheap kitchen appliance. ($100AUD) ... really designed for roasting food but could work.

The drum looks sturdy. But I don't think I could easily put a probe inside the drum to measure bean temp, but a simple k-probe is easy to place to measure the drum temp.

Controls are very basic & I don't think accurate , but I'll use the thermometer to get a better indication of the ambient temp inside the chamber.

I'm using 200g of a Colombian coffee.

Starting weight :200g

Finishing weight: 183.9g

difference :16.1 .... 8.05% loss  .... thus its  light roast !!!

Time 

 0 min         Charge Temp: 195C

1.30 min     Turning point 110C

5 min .........drying phase 160C

8 mins ........Browning phase 182.6C

9 mins ..........1st crack  205C

10 mins         ... Drop 

11 mins..........cooling

11 mins total

I think I could go longer or raise the temp after 5 mins to get a darker roast.

Still Lets see how this lighter roast tastes.

The temperatures in the drum chamber are certainly  alot lower than the bean temps.

I think I'll raise the temps next attempt.

My temp meter and probe.

This was my initial plan

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