Posted Wed Oct 8, 2008, 9:48am Subject: microfoam issue on synesso
need some foam chemistry. synesso 2 group, when steaming milk we can't get the microfoam we're used to. started seeing 1-2 mm bubbles that won't pop or swirl out. not a barista issue, tried another brand of milk & ruled that out. steam temp set at 250, tried dropping to 240, then 252. same results.
Is this a change in that machine's performance or a comparison to another machine?
If the Synesso changed, and the steam is powerful and relatively dry, then check the tip for obstructions or milk build u that could be changing the stem's flow.
If it is comparing to other machines, I have been there... Going from Silvia with a single-hole tip to a VBM Domobar Super with a two hole tip was a real challenge when steaming. With the VBM I have to inject far less air for a far shorter time early on in the process. it took some time to adjust, but I am now pouring latte art with soymilk stretched on the VBM....
Beezer Senior Member Joined: 17 Oct 2006 Posts: 455 Location: Fresno, CA Expertise: I love coffee
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Posted Wed Oct 8, 2008, 2:37pm Subject: Re: microfoam issue on synesso
I have no experience with that machine, but it sounds like you need to inject less air in the stretching phase and focus on whirlpooling the milk. Any large bubbles should be sucked into the milk and smoothed out by the whirlpool action. As I understand it, big commercial machines require virtually no stretching at all. Just place the tip of the wand just under the surface and let 'er rip.
Posted Fri Oct 10, 2008, 2:38pm Subject: Re: microfoam issue on synesso
def change in machine performance. noticed some leaks around the steam arm seals & replaced the o-rings. noticed some crud buildup when we took the arm apart. going with possible obstruction for now. interesting though--the goofy tiny bubbles seem like water bubbles & not milk. might be another seal further back letting some moisture or excess condensation in the line. will report back monday or when we get it resolved.
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