Tree Field double grinder

February 13th, 2023, 10:54 pm

Also, anyone know what the grinder/machine is beside the EK43 in the background?

Copied from: Kasuya's new "Hybrid" Hario Switch method

#2: Post by **yakster** » February 13th, 2023, 11:16 pm

"Kirimai" - TREE FIELD double grinder with a chaff separator cyclone.

Found by Google Image Search.

#3: Post by **Jonk** » February 14th, 2023, 6:07 am

Interesting grinder. Unsurprisingly it's about $4000 though..

#4: Post by **yakster** » February 14th, 2023, 3:01 pm

The following 2021 article on the effect of chaff on the taste and extraction of espresso mentions that this grinder would be coming out. The impact of chaff seems to be negligible, at least not worth $4000 to remove from my reading of the article.

https://towardsdatascience.com/does-cha ... c2b0b4f938

#5: Post by **Jonk** » February 14th, 2023, 3:38 pm

I haven't tried it for espresso, but was surprised by the difference in cupping. Didn't expect any after looking at Ray Murakawa's video, but finally tried it after looking at

...and have to admit that it tasted better without chaff. It's just a hassle to remove it with most grinders, so I do think having a cyclone built in could be worth a lot (if compared to other high end grinders).

#6: Post by **Jeff** » February 14th, 2023, 7:44 pm

I would definitely look into the experimental methodology and reputation of the author of that 2021 blog post and determine how much weight you want to give to its findings.

February 14th, 2023, 10:17 pm

I've found that chaff has less of a taste with washed coffees, as opposed to naturals, honeys, etc.

Perhaps coincidentally, when I roast a natural, the smell of the chaff in the roasting room lasts for four-five days, as opposed to a day or two for a washed.

Re: Lance's video - I always groom for quakers, semi-quakers, and hitch-hikers in the cooling tray, and also before brewing. I better not have scorched, tipped, or faced beans

although after reading Hoos' booklet, I am going to check carefully the next time I roast. I have tried double-grinding and removing the chaff, but at the moment I do not - but if a grinder removed the chaff for me and my taste preferences changed to chaffy coffees like the Ethiopean natty in the video ...

February 15th, 2023, 1:34 am

Ground chaff collector! How about that.

Given the amount of plastic on that machine, I would guess it's a consumer grinder. Doesn't the new concept usually get tried in commercial domain and then get watered down to consumer grade?

#9: Post by **malling** » February 15th, 2023, 6:37 am

Chaff definitely has a negative impact on taste, there reason why we seen some go lengths in removing those. You can try cupping one with and one without you might actually be surprised of the difference it can give. This is especially true for none washed coffees.

It's just as you can taste defects like insects attacked beans, fungus attacked, scorched, tipped, quakers, sour, floaters, black, hull/husk..

#10: Post by **Milligan** » February 15th, 2023, 8:54 am

I don't think I'll try chaff vs no chaff. Ignorance is bliss especially when there is a lot of work involved in getting no chaff.