Loads of questions

Roasting on the Bullet
1

0.9kg 3rd round
0.9kg 3rd round1366×768 133 KB

1.2kg first try
1.2kg first try1366×768 132 KB

Hi gents,

New to the Aillio Bullet, just bought it a weeks ago secondhand.
I have been roasting for a while on smaller home made roasters, more handomatic but I have quite an idea of what I like in the coffee.

So I roasted about 10kg’s on the bullet till now. It is a v1 r2 with the IBTS serial no 1409 so quite early. I started with smaller batches like 600 gr and went up to 1.2kg.

I got some replies back from the guy I bought the roaster from, he says my curves are too flat.

Can someone explain me a bit about the theory? I tried to read and watch some movies but it is not getting clear enough to me.
So what happens if FC will be earlier or later? What happens if I slow down after FC or speed up the roast?

What do you guys think about my graphs?

I used to roast on small mesh drums in a rotating oven with electric heaters below, called rotisery oven (my rotisery) I adjusted them a bit with adjustable thermostats and extra insulation. I used to roast well into FC about 9 minutes 250c and then remove the heat after 11 minutes, end roast around 13min.
This way of roasting gave quite good and consistent results and was happy with it.

So now I bought the bullet and still need to properly taste the coffee since the roasts are still too fresh. But hoping to get some insides about how I am doing?

Thanks a lot in advance!

Arjen

2

Hi Arjen,

We would suggest that you avoid charging any batch size larger than 1kg. Charging up to 1.2kg may result in inaccuracy, and more importantly, wear down the parts, such as the IBTS Lens and Chaff Filter, way faster than they should.

Best regards,
Kevin

3

Hi Kevin,

Thanks for the reply! I saw some recipes for 1.2kg so I thought it should be possible.
Will reduce to 1kg then.

What do you think about the curves is it ok?

4

Hi Arjen,

Thanks for the info. The recipes for 1.2 kg you saw on Roast.World might be the ones for the R2 Pro, as they can roast up to 1.2 kg.

While it’s possible to roast up to 1.2 kg on the R1V2, it wears out the parts more often than usual, so you will have to keep up with the maintenance to avoid damaging the electronics, which is why we generally don’t recommend doing so.

Based on the provided roasts, the Bullet should be working fine at the moment. We’re not sure what “too flat” means, but the crossover between the IBTS Temp and Bean Temp seems to be in the correct range, and the IBTS First Crack Temp is within tolerance.

For your information, you should anticipate the first crack at IBTS Temp 195 °C - 205 °C. While the crossover varies in batch sizes, it should not be below 185 °C.

Best regards,
Kevin