niwot Senior Member Joined: 7 May 2007 Posts: 37 Location: Niwot, CO
Espresso: Silvia v2 Grinder: Mazzer Mini E Vac Pot: Quoi? Drip: Post nasal Roaster: Behmor 1600
Posted Mon Mar 16, 2009, 7:20pm Subject: Re: The Compak K3 Grinder User's Thread
niwot Said:
I would really like to get one of the K3 mini hoppers for use on a K6. Just curious if anyone knows a source for purchasing the mini hopper separately. If not I'll check with one or more dealers, and I'll post a follow-up if I learn anything.
Espresso Parts NW will sell the K3 mini hopper separately. The part number is K02286. I'm still thinking it over, but if anyone is interested you're welcome to email EPNW.
GC7 Senior Member Joined: 7 Jan 2008 Posts: 182 Location: Westchester County, NY
Posted Mon Mar 30, 2009, 7:33am Subject: Re: The Compak K3 Grinder User's Thread
About 1 time per month I run 40-50 gm of minute rice through the grinder and then vacuum and compressed air clean followed by some coffee and repeat the vacuum and air cleaning.
Every day I vacuum out the grind chamber (my small carry Oreck tube fits perfectly inside) and pulse out the remaining grinds vacuuming the residue. This takes about 1 minute.
However, I'm getting a much louder sound this morning when grinding. I changed coffees (Liq Amber Blend). I loosened the grind way down to coarse settings and then vacuumed out the chamber before resetting but its still making that sound. It's not junk (rock etc) in the beans and I don't think the burrs could be touching as I use a much tighter setting for SO ethiopians at low dose and decafe. Thoughts?
Good Question - One is gone already and I should just take out the other one. It's more of a high pitched sound then I think rubber would make. I called Chris Coffee and the tech wants to listen over the phone if the sound continues.
The grinds are still fine. 26 second 1.75 oz liquid amber pulls with no channeling.
jorgeelizondom Senior Member Joined: 7 Feb 2009 Posts: 28 Location: Mexico Expertise: Just starting
Posted Mon Mar 30, 2009, 4:08pm Subject: Re: consistency in doze weight for a given volume
I'm kind of concerned/puzzled by the variation in doze weight given the same volume.
After grinding I use the handle of my scoop to level the PF flat. Always use the same procedure: do not tamp, level using NSEW, never disturbing the grounds, etc. After leveling, I have recently began weighting to measure how consistent is the doze weight. I found that the doze weight varies from 16 to 18gr, sometimes varying these 2 grams within a day difference (same humidity, batch, etc).
GC7 Senior Member Joined: 7 Jan 2008 Posts: 182 Location: Westchester County, NY
Posted Mon Mar 30, 2009, 6:36pm Subject: Re: consistency in doze weight for a given volume
Jorge
I can't explain what you're observing except that I would bet that the variation isn't from the grinder.
Have you used the touch feature and weighed the coffee? I've found pretty consistent results from touch dosing so long as the hopper has a reasonable amount of beans and you use the same beans. I've not tried that from day to day but only during a prolonged series of shots from an individual bean preparation.
Also, my noise went away after changing coffee to pull an Ethiopia IMV SO shot (heavenly) and then resetting the grind (tighter) to make a decafe cappuccino. I can't explain it but I'm happy and its humming quietly away.
theonh Senior Member Joined: 18 Jul 2009 Posts: 8 Location: Toronto Expertise: Just starting
Posted Thu Aug 13, 2009, 12:36pm Subject: Re: The Compak K3 Grinder User's Thread
I too have noticed that there is an issue with grind retention with this machine. There is basically a ring of coffee left around the side of the sweeper within the burr chamber (I'll try to get a picture up of what I'm talking about next time I clean it). I'm not sure if it's only my sweeper, but the metal sweeper arms don't make it all the way to the edge of the circular chamber which I think is responsible for most of the grind retention.
I'm thinking of attaching some velcro or something to the end of the sweeper so it can get closer to the edge. Anyone think this is a good idea/have a better idea?
theonh Senior Member Joined: 18 Jul 2009 Posts: 8 Location: Toronto Expertise: Just starting
Posted Thu Aug 13, 2009, 12:44pm Subject: Re: The Compak K3 Grinder User's Thread
Actually, SM has some pictures of what I'm talking about. In the second set of images, it's the image on the right. The gap between the edge and those 3 metallic sweeper arms leave a big circle of coffee left from grind to grind.
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