Machine: Faema E98 Compact Automatic Single Group, manufactured 2001. It has a Cimabli group - actually very similar overall to the Cimbali Junior (automatic) D1
Problem: Pours/shots have progressively worsened - pouring too fast.
Ive think Ive narrowed down to the problem to short infusion. The coffee always begins to pour out of the portafilter basket almost as soon as I press the brew/dispenser button.
I compared it to Junior S1 (manual/tanked with vibe pump). It has the same group. Using the same coffee / grind. The junior consistently as a nice long infusion delay before the coffee begins to pour through basket.
For what its worth I measured the brew pressure ramp up time.
Using a water filled pressure portafilter:
Junior S1: 3.0sec to 8bar
Faema E98: 1.7sec to 9bar
Of course this would be different to a basket filled with tamped coffee - but maybe its an indicator.
Any how I dropped the brew pressure on the Faema (to 7bar) - but it still pours too fast, or perhaps should I say too soon. In fact I have to grind too fine (get a very acidic coffee) to get a reasonable shot time.
The Faema uses a rotary pump. If the problem is the infusion / ramp up, is there a way to adjust or fix it?
Any comments would be greatly appreciated.
Problem: Pours/shots have progressively worsened - pouring too fast.
Ive think Ive narrowed down to the problem to short infusion. The coffee always begins to pour out of the portafilter basket almost as soon as I press the brew/dispenser button.
I compared it to Junior S1 (manual/tanked with vibe pump). It has the same group. Using the same coffee / grind. The junior consistently as a nice long infusion delay before the coffee begins to pour through basket.
For what its worth I measured the brew pressure ramp up time.
Using a water filled pressure portafilter:
Junior S1: 3.0sec to 8bar
Faema E98: 1.7sec to 9bar
Of course this would be different to a basket filled with tamped coffee - but maybe its an indicator.
Any how I dropped the brew pressure on the Faema (to 7bar) - but it still pours too fast, or perhaps should I say too soon. In fact I have to grind too fine (get a very acidic coffee) to get a reasonable shot time.
The Faema uses a rotary pump. If the problem is the infusion / ramp up, is there a way to adjust or fix it?
Any comments would be greatly appreciated.

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