elemenoh Senior Member Joined: 3 Jun 2014 Posts: 1 Location: Bay Area Expertise: I love coffee
Espresso: Nuova Simonelli Oscar Grinder: Rocky
Posted Tue Jun 3, 2014, 7:31pm Subject: Splatter shots
I recently got a naked portafilter and all of my shots have been splattering.
Setup Nuova Simonelli Oscar Rocky grinder Naked portafilter (58mm) with double basket 58mm flat tamper Beans less than 2 weeks old Grind below '10' adjusted each batch Scale (only measures to the gram)
Process Machine is on a timer and has usually been on for 30 min before I use it Purge some water to avoid steam shock Purge the grinder a bit to get rid of stale stuff in the chute Dose 17-18 grams (i've tried more and less to avoid splattering, but it hasn't helped) I level off with my finger, leaving a bit of a concave shape from the middle Tamp straight down with about 30lbs force (I've tried more and less, but it hasn't helped)
I can get the shot to pour slower/faster depending on my config, but it always splatters. I've found there is always coffee on the screen, even though the coffee is below the taper line after I tamp.
From what I've read it sounds like the coffee touching the screen might be the cause of the splatter, but I'm not sure how to avoid it touching. Are there different sized screens or gaskets? Anything else to try adjusting?
sounds like channeling, but some light spritzs also happen occasionally without channeling. difficult to know which, unless you 1) post a video or photo depicting the problem, or 2) confirm the "splattering" is coming out in streams
you "need" a better scale, that measures in 0.1 g increments. Of course, if you can dose consistently without a scale, then you could get by without one.
Process ...Dose 17-18 grams (i've tried more and less to avoid splattering, but it hasn't helped)...I've found there is always coffee on the screen, even though the coffee is below the taper line after I tamp...From what I've read it sounds like the coffee touching the screen might be the cause of the splatter, but I'm not sure how to avoid it touching. Are there different sized screens or gaskets? Anything else to try adjusting?
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