[Fat_Ed]

Are you weighing what’s going in and out of the grinder?
Neil

Yeah. Just had another go today. Really bellowed the hell out of it to make sure retention was as low as possible and the measurements seem to confirm.

I'm using a normcore v4 tamper with a spring, so I also made sure that I pressed on it 3 full seconds each time to ensure it would apply full pressure (before I was going quite quick so wondered if sometimes it didn't fully tamp the puck).

Shot 1 — 18.1g in grinder 18.05g out. 36g in the cup @ 40s
Shot 2 — 18.1g in grinder 18.1g out. 36g in the cup @ 27s
Shot 3 — 18.0g in grinder 18.0g out. 36g in the cup @ 25s

Only other thing I can think of is that my boiler is running a bit high and the first shot that comes is a bit steamy at the start. Will try flushing it better tomorrow.

But any other ideas/experiments would be greatly appreciated

 

[Alfieboy]

Weird And what is your machine?

 

[Fat_Ed]

Weird And what is your machine?

Gaggia Classic (pre-2009), with a PID and so on.

 

[Alfieboy]

I’ve always found them to be quick rather than slow but that is mad - small boiler too so perhaps flush some through then get back to temperature or release pressure by opening the steam valve

 

[Fat_Ed]

Today's testing — flushing a shot did diddly squat. Same pattern. And now annoyingly I am out of that bean, will have to dial in another and see what happens.

My only other thought is that the first grind is somehow producing, or at least giving out, more fines...

Shot 1 — 18g in grinder 17.9g out. 36g in the cup @ 45s
Shot 2 — 18g in grinder 18g out. 36g in the cup @ 29s

 

[hotCUPPA]

Is this grinder manufactured by different people or they all come from the same factory and are only marketed and sold by different shops?

Asking this in regards to noise, are they all pretty noisy or if coming from different factories do they differ? (If so, which one is quieter?)