Duo grind setting is really messed up

Lower burr carrier has a key way so will only go back in one position, OBS if you take the burr off the carrier there are three possible positions, but I mark the burr if doing this

In terms of grind perhaps I’m not as fussy as others as I’ve found it very set and forget, working range of 4-10 beans and baskets depending. But I also just used it from the get go, I had 200g of a roast I did that I didn’t like, so ran most that through then go bored 😂

You will have less movement on the dial than a conical, but I’ve found no more or less from using the major, but I’ve had flats pretty much all my time in coffee.

Have you recalibrated? I can’t think of a reason it would be that drastically different, bar a clean grinder taking some grinds as retention first use.

thusband - maybe some trapped coffee at the bottom of the lower burr? Give it a clean, make sure it’s sitting properly and, before you put the collar back, press the top burr at the centre and make sure the carrier is sitting properly and making contacts with the springs.

Can’t think of anything else at the moment.

Too fine if clogging

Don’t forget in the zero you close the burrs so they are locked

On the duo being flat, touching point and burr lock are two very different thing,

Burr lock on my duo is roughly -10

Flat burrs are a lot more sensitive to grind settings than conicals, it’s just the way they are.

On an average, I am on 5 for light, 5.5-6 for medium (for milk) and 3.5 - 4 for decaf. I have hardly seen the need to change during the last 1 month of use.

In my case, the sensitivity isn’t noticeable even up to a full point. Today, I pulled a second shot of the Crankhouse Jhoan since opening it a couple of days ago. I ground at 4 than the previous grind ref of 5. It just improved the shot time by 3s to 25s at 7 bars.

Of course, I seasoned each burrs set with 3KGs of cheap beans before pulling the first shot on the Evo.