cafe Masy Fluid bed (air roaster) JMS-210

My first roast using the CafeMasy air roaster.

It has 3 fan settings , a timer and a temp setting.

I'm not sure how accurate the temp is.

The basic instruction suggests:

1) Warm up the roaster for 2 minutes (@ 230c)

2) Fill the bean hopper (100g raw beans)

3) Set the roaster to:

      230ºC

     Max fan speed

     9 Minutes

This simple trial run using some Colombian beans

after 9 mins produced a dark roast (85.3g)

One drawback of this machine is the loudness of the fan which makes it hard to listen for first cack.

Another alternative would be to slowly increase the temp from it's initial charge temp

up to the 204C needed for 1st crack, slowly passing through the 3 phases.

Change the preheat temp/time, or set the countdown timer to different times and play around with the different fan speeds and temperatures to alter roast profiles. This is a very easy and I think forgiving machine to learn the basics of roasting. 

The 3 basic phases are

Phase                          Min                     Max                   Percentage    End of Phase

Drying               100F 37C            300F 148C                 45%               3 - 4 min

Maillard             300F 148C         400F  204C                 45%               7- 9 min (FC)

Development     400F 204C          500F 260C                 10%                1-2 mins

These are just guides.

So I'll aim for this first;

charge at 150C for 1.5 mins

0 min : 40C

4 min   148C

8 min    204C

9 min : start cooling

uganda bugisu ab washed

100g in 

88.8g out

I adjusted the temp settings on the roaster display

thus:

Charge temp : 150c for 2 mins

vent setting of 2

4min - 150c

4.30 min - 160

5.00min - 170c

6-180

6.30-190

7.00 - 200c

7.30 - 212c

8 - 220

8.3-221

9.10 - 230 - FC

11.00 min drop

thus 11.2 % loss

Light roast

fairly consistent

Not a bad first attempt.

I don't think the temp readings are very useful.

This  machine will benefit with some mods.

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2nd roast

Costa Rica

Experiments with a charge temperature around 205C.

& a low vent setting.

The lower vent should make for higher temperatures as the beans aren't being tossed up so much.

These are my recordings for the roast:

charge at 205C for 1.5 mins

then lower it to 180c

4 min   195C

6 min 200c

7 min 202 C  (FC was at 7.48)

8 min    204C

10 min 211C

I was going to drop at 10 for a light roast but 

I let it run to 13 mins .... this is just into dark roast levels

In 100g

out 85g

15% water loss

I think raising temp gradually  to

180 c - 5min is OK --- drying should be finished by then.

 204c at 8mins is a good target.

then gradually raise temp to 220 at 11 mins

then drop there. for a medium roast.

.

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