Help with large funnel cone during extraction - Page 2

Beginner or pro barista, all are invited to share.
User avatar
cannonfodder
Team HB
Posts: 8061
Joined: Mon May 23, 2005 8:20 am
Real Name: Dave Stephens
Equipment: Elektra A3, Faema, Gaggia Lever, LaCimbali the list goes on...
Location: Downingtown PA

Postby cannonfodder » Mon Dec 31, 2012 2:18 pm

Every day your beans are a day older. The temperature has changed, the humidity has changed, the barometric pressure has changed, your dose has changed, your extraction temperature has changed, etc.... You will need to make small adjustments to the grind to compensate for the aged of the beans and changes in atmosphere. Your dose is also varying shot to shot unless you are using a scale to weigh every shot. In short, a lot of things change. A very large cone could also be a dead spot in the middle of the puck. No espresso flowing from the center so the 'cone' does not extend to the center of the basket which will also change the size, and could explain the bubbles since you have a dime sized air pocket under that cone. Make sure your flush is correct, verify your dose shot to shot and you probably need to tighten your grind just a bit between day 1 and day 4.
Dave Stephens

hamish5178
Posts: 189
Joined: Thu Aug 11, 2011 11:55 am
Real Name: Alex
Equipment: La Spaziale Mini Vivaldi II, Compak K10 PB, Baratza Vario w/ Ditting Burrs, scales and cones
Location: PA

Postby hamish5178 » Tue Jan 01, 2013 6:59 pm

Here's my $0.02:

The video OP posted shows a clearly defined layer of light colored crema sitting on top of the shot very early on in the pour. It's been my experience that that sort of crema is indicative of stale coffee. Whenever I'm using non-stale beans the "guinness-effect" flows seamlessly into the top layer without much color contrast at all. . .