Taskete Senior Member Joined: 27 May 2013 Posts: 9 Location: Lund - Sweden Expertise: Just starting
Posted Thu Jun 6, 2013, 1:58pm Subject: Listen to this! [Video]
Have a coffee grinder (Casadio MD Istantaneo) who has been a bit tricky.
As it is entirely stepless I have tune it until it gets good. Now I want to go to a finer setting but I hear this sound that makes me worry. It sounds like that the conical grinding discs(?) goes against each other.
Is this a bad sound and should I not go to a finer setting? Is this OK for conical grinder?
calblacksmith Moderator Joined: 25 Nov 2007 Posts: 6,827 Location: Riverside, Ca, U.S.A. Expertise: I live coffee
Espresso: ECM Veneziano A1 Grinder: Many different commercial Vac Pot: 40s era Silex Drip: Milita, Bunn&Curtis... Roaster: Cast iron pan, gas burner
Posted Fri Jun 7, 2013, 12:44pm Subject: Re: Listen to this! [Video]
Then your grinder is not able to grind for espresso regardless of what the manufacturer says. If you are within the return window, you will be better off returning the grinder to the seller and buying a grinder that IS able to grind for espresso. Tamping will NOT alter the flow of the espresso. The sole reason for the tamp is to remove voids in the puck. To provide a even and consistent bed for the coffee to flow through. You can not match the pressure that the water does. The machine is using water at about 140 pounds PER SQUARE INCH. You have over 5 square inches in a 58mm porta filter, total water pressure is over 700 pounds pressing down on the coffee bed. A 10 or 20 pound difference in the tamp makes no difference to the coffee pressure and flow.
THE GRINDER IS WHAT ADJUSTS THE SHOT, THE GRINDER IS MORE IMPORTANT THAN THE MACHINE, IF YOU CAN NOT GRIND FINE ENOUGH TO CHOKE YOUR MACHINE, YOUR GRINDER IS NOT ABLE TO GRIND FOR ESPRESSO.
Sorry about the "shouting" above but it really is that true and that important.
In real life, my name is Wayne P.
Feed the newbs, starve the trolls and above all enjoy what you drink!
russel Senior Member Joined: 12 Mar 2010 Posts: 409 Location: Los Angeles Expertise: Pro Roaster
Espresso: 73' Cremina, Eurobar,... Grinder: Super Caimanos x2, Forte BG,... Drip: V60, Kalita Wave, Clever
Posted Fri Jun 7, 2013, 7:58pm Subject: Re: Listen to this! [Video]
That is crazy. It's like someone took apart a Nino and crammed it into a plastic box.
I was going to suggest that your flat burrs where miss aligned maybe with some grounds or oils bult up underneath, but it seems that you have a conical grinder. There may still be an alignment problem that is responsible for both the noise and the corse grind. I'm not sure if you would be able to correct that yourself. I don't know how much this grinder costs, but you might want to find a local tech that can check it out...
Even though I wouldn't exemplify this to the built-in tamper (I know a grinder that has espresso in its type designation and is far from being able to perform up to this name), the Casadio Istantaneo is a semi-commercial, fast, stepless grinder with conical burrs that ought to be able to grind fine enough for espresso. It can even be used in small coffee bars, for example.
There are several possible explanations why yours doesn't:
Your beans are stale.
The Casadio is susceptible to transport damages. So maybe yours got spoiled during shipping.
If you bought a used grinder, the burrs might be worn-out.
The burrs are miss-aligned.
*** "This drink of the Satan is so delicious that it would be a shame to leave it to the infidels." (Pope Clement VIII on coffee)
Posted Mon Jun 10, 2013, 6:39pm Subject: Re: Listen to this! [Video]
I can't speak for your grinder for sure but I know many ( maybe all) grinder burrs have an area that they will rub first before they will hurt the teeth. I believe the area that I'm seeing in the pictures that you believe to be worn is in fact that area- which is to say it's supposed to look like that. If someone knows better please speak up. That would still leave the question- what is the problem?
I would go back to NobbyRs' list of possibilities, excluding worn out burrs as in the pictures yours appear to be sharp. What beans are you using? When were they roasted? Did it grind other beans properly? You said you had it tuned good but now need to go finer, so it was making proper espresso with other beans? A little more background information would help.
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