Roasty

Moka Kadir again. Took this one to Full City+ / maybe Vienna? Temps on this one are from the fancy new thermocouple I hacked into the roaster.

Vital Stats: 250g roasted, 77F Ambient, Target of Full City++ (447F). Post roast weight: 206g.

Time Temp Heater Fan Notes
0:00 229 100 0
0:15 243 100 0
0:30 256 100 0
0:45 269 100 0
1:00 282 100 0
1:15 294 100 0 Dropped Beans In
1:30 279 100 0
1:45 244 100 0
2:00 206 100 0
2:15 184 100 0
2:30 174 100 0
2:45 171 100 0
3:00 174 100 0
3:15 179 100 0
3:30 186 100 0
3:45 193 100 0
4:00 201 100 0
4:15 208 100 75 Quick fan kick to remove moisture
4:30 215 100 0
4:45 223 100 0 First Aroma
5:00 230 100 0
5:15 236 100 0
5:30 243 100 0
5:45 249 100 0
6:00 255 100 0
6:15 261 100 0
6:30 266 100 0
6:45 272 100 0
7:00 277 100 0
7:15 282 100 0
7:30 287 100 0
7:45 291 100 0
8:00 296 100 0
8:15 300 100 0
8:30 305 100 0
8:45 309 100 0
9:00 314 100 0
9:15 318 100 0
9:30 322 100 0
9:45 327 100 0
10:00 331 100 0
10:15 335 80 0
10:30 339 80 0
10:45 344 80 0
11:00 348 80 0
11:15 352 80 25
11:30 356 100 25
11:45 360 100 25
12:00 364 100 25
12:15 368 100 25
12:30 372 100 25
12:45 376 100 25
13:00 381 80 25
13:15 385 80 50 FC Starts
13:30 390 80 50
13:45 395 50 50
14:00 399 40 50
14:15 403 40 50
14:30 406 40 50
14:45 410 40 50
15:00 412 40 50
15:15 416 40 50 FC Ends
15:30 419 80 50
15:45 422 80 75
16:00 425 80 75
16:15 429 80 75
16:30 432 80 100
16:45 436 60 100 SC Starts
17:00 440 60 100
17:15 445 60 100
17:21 447 60 100 Stopped Roast

More Roasts

Since the HotTop arrived, I’ve gone through four roasts. The first roast (which I’ll call roast zero) was a total failure and I was quite bummed. That is, until I realized that in my excitement and haste, I had forgotten to install the rear filter. Without the rear filter, way too much air was drawn into the roasting chamber by the fan, which quickly stalled and then killed the roast. 250g of baked beans went right into the trash.

Once I figured out what I’d done wrong, the next few roasts went swimmingly. Here’s the data for roast of some of Sweet Maria’s Moka Kadir:

Time Temp Heater Fan Notes
0:00 167 100 0  
0:30 168 100 0  
1:00 177 100 0  
1:30 188 100 0  
2:00 201 100 0  
2:30 213 100 75  
3:00 226 100 0  
3:30 240 100 0  
4:00 253 100 0  
4:30 266 100 0  
5:00 278 100 0  
5:30 289 100 0  
6:00 300 100 0  
6:30 309 100 0  
7:00 318 100 0  
7:30 325 100 0  
8:00 334 100 0  
8:30 341 100 0  
9:00 347 100 0  
9:30 354 100 25  
10:00 359 100 25  
10:30 365 80 25  
11:00 370 80 25  
11:30 374 80 25  
12:00 377 80 25  
12:30 381 80 25  
13:00 386 80 25  
13:30 388 60 75  
14:00 392 60 75 First Crack starts
14:30 395 40 100 Rolling First
15:00 397 40 100  
15:30 399 40 100  
16:00 401 40 100  
16:30 401 40 100  
17:00 401 40 100 First Crack finishes
17:30 402 40 100  
18:00 402 40 100  
18:30 402 40 100  
19:00 402 40 100 Second Crack starting
19:30 404 40 100 Second Crack rolling

My second roast was some Ethiopia Organic Sidamo Dry Process Special Selection.

Time Temp Heater Fan Notes
0:00 167 100 0  
0:30 172 100 0  
1:00 181 100 0  
1:30 194 100 0  
2:00 208 100 0  
2:30 221 100 75  
3:00 235 100 0  
3:30 249 100 0  
4:00 262 100 0  
4:30 275 100 0  
5:00 287 100 0  
5:30 298 100 0  
6:00 309 100 0  
6:30 318 100 0  
7:00 327 100 0  
7:30 336 100 0  
8:00 343 100 0  
8:30 350 100 0  
9:00 357 100 0 Slight crackle
9:30 363 100 25  
10:00 368 100 25  
10:30 374 80 25  
11:00 379 80 25  
11:30 383 80 25  
12:00 386 80 25  
12:30 392 80 25 First big pops of FC
13:00 395 80 25  
13:30 399 60 75  
14:00 402 60 75 FC rolling
14:30 406 40 100 FC ends
15:00 408 40 100  
15:30 410 40 100  
15:45 411 40 100 Stop roast. SC just starting

A New Roaster

After burning through (not literally) a few pounds of green beans with the iRoast that AJ graciously sent me, I quickly realized that I really enjoy roasting coffee. I like the iRoast, but it has a very limited capacity and it’s really not known to be a great espresso roaster, so I started doing some digging around. After reading a bunch of reviews and forum posts on Coffee Geek and Home Barista, I settled trying to find a used HotTop to continue my little roasting adventure. One post to Coffee Geek and a few emails later and I’m soon to be the proud owner of a slightly used roaster, formerly owned by a church in Pennsylvania.

So.

Excited.

More when it arrives.

Thermometer Arrived!

The multimeter and thermocouple I ordered to monitor roasting temp arrived today! I also stumbled on this handy little chart for the iRoast over on Sweet Marias. I’m reproducing it here so I don’t lose it…

Degree of Roast Temp
Green Unroasted 75
Starting to pale 270
Early yellow 327
Yellow-Tan 345
Light Brown 370
Brown 393
1st Crack Begins 401
1st Crack Under Way 415
City Roast 426
City+ 435
Full City 446
Full City+ 454
Vienna 465
Full French 474
Fully Carbonized 486
Immanent Fire 497