自介、海勒102 — bbdog大請進~ - 咖啡討論
By Ethan
at 2020-09-01T18:21
at 2020-09-01T18:21
Table of Contents
以前玩手沖,用的是幾百塊的雲朵壺和磨豆機,然後就中斷了好幾年。重新開始喝咖啡,
就直接進到義式了。我是在沒接觸過義式咖啡的情況下買Helor 102的。
我沒有器材不斷升級的經歷,很少到咖啡廳喝咖啡,很少和人交流,都只上網潛水、買豆
子。所以我很難比較Helor 102和其他磨豆機的優劣。我只知道當初家裡來客人,為了應
急,到附近精品咖啡店買義式豆,現場點一杯,回家再壓一杯(我的義式機是flair pro
),店裡的雜澀味比較重,我的比較甜XD
我之所知還很淺薄,因為無法完全掌握每天壓出來的咖啡,不清楚萃取率上下震盪的
真正原因。比如都是15g粉,粗細1:49(1圈49小格,Helor 102一圈有六十小格,粗細就
以時間表示)9/1萃取率23.04%,8/31 22.3%。我猜原因是2 bar預浸完升壓時,昨天在6
、7 bar間頓了一下才到9bar,今天穩定直上9 bar。此外,昨天咖啡液38g,今天40g。
看到這裡,版友可能會以為萃取率上升,只是因為水粉比變大了而已。容我補充說明:
8/30第一次壓這包豆子,出杯各項參數是15g粉38g咖啡液,粗細1:50,2 bar預浸完穩定
直升9bar,萃取率23.02%。是什麼原因導致8/31萃取率一下掉了1%,苦澀變重,通道產生
?這才是真正的問題。
半年多來天天壓咖啡,讓我比較能跳過一些步驟,不用一次只動一個參數調整。這種直覺
產生於一次次故障排除後,終於意識到問題出在沖煮技術。而在產生這種直覺之前,我有
好一段在迷惘中迂繞的時期。
有兩三個月我壓出來的咖啡很難喝。所以重新走了一遍咖啡之旅:
Dosing:14g—>17g。
Yield:lungo—>2.5~6 : 1
Pressure:壓力上限6 bar —> 上限9 bar。
Tamping:flair塑膠小杯杯底壓粉 —> 以粉錘壓粉。
Temperature:汽缸預熱2、3次 —> 預熱1次。flair無法控溫。
WDT:隨便攪 —> 從周圍繞著小圈攪拌,最後繞到中心,讓粉床變漏斗狀,再輕敲底部、
側邊把粉整平。這是很關鍵的一次領悟,因為既然是distribution,就應該不只是攪散團
塊,還要真的讓粉粒重新分布。而因為咖啡珠總是從無底濾杯邊緣出現,所以如果攪拌止
於某處邊沿,那個地方很可能會成為通道。解決辦法就是讓攪拌停在中心,讓中心密度稍
低,敲完底部,把周圍稍高的粉拍進凹陷處,然後壓粉。這樣壓出來的咖啡比較甜,萃取
率也比較高。
Grind:從Matt Perger的網站學到理想出粉粗細200 μm,因為水無法短時間浸透比這
個粒徑更大的粉粒。但粗細還是得視流速、萃取率、風味決定。
Grinder:用白板筆法檢測磨豆機同心度和平行度,用粒徑分析軟體證明了Helor 102在水
準以上。
以上只有WDT一項讓我的義式沖煮有了質變,而即使如此,我的出杯品質還是會不明擺盪
。我才意識到缺陷可能在於沖煮技術:
1.最早以前我習慣以不到1 bar的壓力預浸10秒,然後我發現預浸壓力太小反而會讓水
只浸透粉床的某些部分,增壓的時候那裡就固定成通道了。
2.預浸完升壓要穩定且果決。猶豫,升壓,手感就不會那麼篤實。
猶豫就是想太多,想太多就是太複雜。沖煮,簡單為尚。我正在學習化繁為簡,就像各參
數裡真正重要的只有dosing、yield、grind三項,抓穩了,餘下的就是在沖煮時盡量不要
加進其他變因干擾,讓咖啡以本來面目呈現,這樣就不會有太大的問題。
回到Helor 102,之前一直以為咖啡煮不好是磨豆機的問題,因為它從流理台摔下來過,
壓咖啡即使做WDT都會亂噴,整台拆開重新組裝才解決這個問題。又因為我的懷疑一直都
在,於是拆了又拆,潤滑油都揩掉了,得自己買油保養XD。想請教bbdog大怎麼檢
測磨豆機?我先後在內外刀最底下的光滑處塗白板筆,鎖死互磨,發覺筆跡都可以被磨掉
。平行度我會看下邊有沒有殘留,同心度不知道您會怎麼看?後來我有用一個粒徑分析軟
體(coffee grindsize master)看出粉狀況,看起來很正常,才終結了我的懷疑。
https://imgur.com/a/PpN2QN0 (出粉統計圖表)
b大,關於手動改電動還有一個想法,我忘記電動轉速是多少了,但是電磨會發生的問
題是出粉速度<進豆速度,導致卡在中間的豆子被磨得更細。這是我在James Hoffman的影
片裡看到的說法,他說可以試著緩慢進豆,避免豆子被卡住。我想手動的低轉速可以讓豆
子即使被卡住也不會磨太多次,所以傾向維持原狀。
還有,不知道b大的Helor 102若出義式,粗細多少?很好奇您的義式沖煮參數!
這是我在版上的第一篇文章,才進入咖啡領域不久,跟大家打聲招呼,請多指教!
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