Hi guys,
I'm really scratching (banging more like it) my head on this one, and am hoping someone can help.
I had a Sunbeam em7000 for around 8 years, it was matched with a Compak K3 grinder.
A few months ago I started noticing some large variances in extraction times from day to day and sometimes even shot to shot.
I'm talking about single shot extraction times varying as much as 10s or more. And I also found small changes to grind pushing extraction times in the other extreme.
Figuring it was probably my technique I started weighing my dose, using a distribution tool, paying particular attention to how I tamp... This did not seem to help.
I then bought a new machine (ECM Technika V) and changed the burrs in my grinder. While I seemed to get some consistency for a week, inconsistencies have since returned.
I then bought a naked filter... Extractions are not perfect (with a couple of dead spots) but they are by no means bad; there is also no spraying from the extraction.
I have no idea what could be causing the large variances in extraction since the only thing I haven't changed is me (but I'm confident it's not my technique anymore).
The only other thing I can think of is that I moved house about 5 months ago and this house can get quite hot (and I assume humidity varies a lot too)..
I'll start monitoring humidity, but are there any other suggestions from you guys?
Thanks for your help!
I'm really scratching (banging more like it) my head on this one, and am hoping someone can help.
I had a Sunbeam em7000 for around 8 years, it was matched with a Compak K3 grinder.
A few months ago I started noticing some large variances in extraction times from day to day and sometimes even shot to shot.
I'm talking about single shot extraction times varying as much as 10s or more. And I also found small changes to grind pushing extraction times in the other extreme.
Figuring it was probably my technique I started weighing my dose, using a distribution tool, paying particular attention to how I tamp... This did not seem to help.
I then bought a new machine (ECM Technika V) and changed the burrs in my grinder. While I seemed to get some consistency for a week, inconsistencies have since returned.
I then bought a naked filter... Extractions are not perfect (with a couple of dead spots) but they are by no means bad; there is also no spraying from the extraction.
I have no idea what could be causing the large variances in extraction since the only thing I haven't changed is me (but I'm confident it's not my technique anymore).
The only other thing I can think of is that I moved house about 5 months ago and this house can get quite hot (and I assume humidity varies a lot too)..
I'll start monitoring humidity, but are there any other suggestions from you guys?
Thanks for your help!

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