ethorson Senior Member Joined: 4 May 2009 Posts: 53 Location: Port Townsend Expertise: Just starting
Espresso: Bunn ES-1A, Bezzera BZ35 Grinder: Mazzer Mini Roaster: Homemade
Posted Mon Nov 16, 2009, 10:19am Subject: Improvement for Cunill Tranquilo static and clogging problem
My doserless Tranquilo sometimes has the static and clogging problem mentioned in other postings in this forum. I have been using a brush to sweep the coffee into the portafilter for each shot, but it is still a pain to clean out a clogged discharge port. I have found that the situation can be improved by drilling a 3/8" hole in the top of the housing to admit more air to the grinding chamber (see photo). This increases the air flow blown out the discharge port and seems to prevent complete blockage of the port. There is still some accumulation of coffee on the port surface and funnel but it is much easier to brush out. Be sure to remove the aluminum plate before drilling through so you don't drill into the lower burr.
Posted Mon Jun 7, 2010, 11:42am Subject: Re: Improvement for Cunill Tranquilo static and clogging problem
I just did this mod yesterday. Quite helpful.
If you're having problems pulling the top plate (I was), remove the upper burr ring (unscrew), undo the four screws holding the top plate down, screw the upper burr ring back in 2 or 3 turns, and pull on the ring to get the upper plate off. For me, it seemed to pop off quite easily.
Rather than a 3/8" drill bit, I used a Q bit (.332" instead of .375") - it seemed to fit the hole better.
I'm now getting just a small pile of dust in the lower right corner of the port, rather than a large pile blocking the port. I like less work to get the coffee out of the grinder.
Posted Tue Jan 25, 2011, 11:43am Subject: Re: Improvement for Cunill Tranquilo static and clogging problem
I just did this hole-drilling mod, as well as placed rubber between the funnel and the grinder body. I noticed no difference in the amount of grounds left in the chute, nor in the amount of grounds left in the funnel. So, this mod is obviously not a "blanket" fix. It did allow me to see how many caked-on grounds are left in the burr housings, which Grindz grinder cleaning beans are not able to get to.
The only issue I have with the Tranquilo is that each step seems to alter extraction time by about 8-10 seconds. Of course, this could be related to dosing and tamping technique. I use the Schomer Method for distribution.
I'll just continue using the technique I have been using: run the grinder and allow 2 seconds worth of grinds to come out prior to placing the portafilter under the funnel (in order to allow the old grinds to flush out) - problem solved, albeit a slight waste of coffee.
Symbols: = New Posts since your last visit = No New Posts since last visit = Newest post
Forum Rules: No profanity, illegal acts or personal attacks will be tolerated in these discussion boards. No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum. No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek. No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum. Who Can Read The Forum? Anyone can read posts in these discussion boards. Who Can Post New Topics? Any registered CoffeeGeek member can post new topics. Who Can Post Replies? Any registered CoffeeGeek member can post replies. Can Photos be posted? Anyone can post photos in their new topics or replies. Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts. Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.