Tal Never used a bottomless of prior to this machine. Been getting beans from this supplier for a few years now.
Thanks everyone for your time.
I’m posting a single response which pulls together questions frome everyone.
I’ve been making espresso for 20years on a Rancilio Silvia so have some experience, though I’m not claiming expertise. Having said that, I’m happy to accept issues here could relate to my preparation simply on the basis that I am not precious and am looking for a solution. I don’t want to rule out a machine issue nor do I want to rule out human error, so would like to continue to explore all possibilities.
1. Gasket: I’ve replaced the Profitec rubber gasket with a silicone gasket courtesy of machine supplier which hasn’t changed the outcome. Empirically, this new gasket makes it easier to tighten the portafilter so I’m happier with the ‘feel’.
2. Gasket integrity: No leaking whatsoever when I use a blind basket, so I’m assuming the gasket seal is good.
3. Portafilter: Is OEM, came with the Profitec
4. Basket: Tried both the 21g supplied with the Profitec and my own VST 18g.
5. Grinder: Ceado E5P
6. Shower Screen: Here’s what water delivery looks like at the shower screen What we can’t see is what that delivery looks like at 9 bar.
8. Grind: I’ve tried grinding finer and that makes the problem significantly worse
9. Dose: 20/21g
10. Puck prep: I’m very careful with puck prep though that’s not to say that, after all this time, I’m not doing something wrong? I’ve been using a WDT for some years now. I aim for a level bed. Tamper is spring loaded to help me get reasonably consistent tamp pressure. My understanding is that consistency is more important than the actual pressure applied so spring tension isn’t as important.
11. Beans: I’ve been using https://www.beanberrycoffee.com/products/javascript . I buy a 500g bag and keep ~100g in a CoffeVac (CoffeVac.com) in the fridge. I use ~20/21g per day. The rest goes in the freezer in the original packaging based on evidence based research for preserving freshness https://europeancoffeetrip.com/coffee-freshness-science/
12. Beans: I’ve now bought new beans https://www.beanberrycoffee.com/products/ethiopia-sidamo-bochesa-organic . This has significantly reduced the issue though still getting a single fine jet from the bottom of the basket (current grind is returning 10bar at 25secs so am planning to increase grind size slightly until I drop to 9bar for approx 25secs)
I’ve seen a video of bottomless of extraction on the Profitec Move using all OEM kit at almost 14bar with no issues and a smooth extraction. My point here being that I really shouldn’t be seeing this leaking/jetting at 10bar?
Hope this info helps.