Selvy wrote:One small negative is the grinder sometimes, at the lowest RPMs, made a whiny noise that sounded like something was getting stuck in the works. It comes and goes as coffee passes through the grinder, and mostly just happens at the lowest RPMs. I haven't yet figured out what's causing it. But it's not very disturbing and to my knowledge doesn't impact the performance.

I borrowed a DF64V and encounter this problem every single time I grind for pourover. Some fragments get stuck somewhere, preventing me from adjusting grind size finer and making a noise that doesn't want to go away. Playing with the grind size adjustment ring and the RPM can sometimes fix it, but in other cases I had to remove the top part of the grinder and clean it thoroughly inside.

Some other workarounds I saw mentioned (but haven't tested yet) are to add beans while adjusting to a finer grind size, or to change it to be much coarser and then pound the blower to remove the stray fragment.

In any case, this issue makes me think that the DF64V is not suitable for those who drink both pourover coffee and espresso. Likely it's best to use it for one brew type and rely on another grinder for the other.

Dose anyone have a different conclusion / experience?

I've found if you adjust the grinder coarser at max RPM whilst empty then move to your finer setting it resolves this issue. It's merely a bean fragment that has gotten lodged somewhere so you should be able to clear it our without having to open the grinder completely.

From my own experience, the 64V is, without modification needed, one of the best dual purpose grinder, under $1000.
It was also the Coffeechronicler's opinion when he reviewed it. The stock burrs can produce more than acceptable brews even though they seem to be more espresso focused.
That bean fragment or grounds residue can be dealt with per Frankie4's trick or by putting a few beans through the burrs at espresso setting.
Although to me the biggest advantage of the 64V as a dual purpose grinder is the very little grind exchange.
This is what I found in my DF64V's lower burr carrier (1+ month) after cleaning the chute, which is as easy as it gets.
That's as good or better than other grinders that are 2x -4x the price.

@Frankie4 - unfortunately this solution didn't work for me.

I'm curious what other DF64V users experience. After grinding for pourover, can you guys easily adjust to a finer grind size (e.g. for espresso)? In my case it always seems like there are some stray fragments somewhere that interfere. There is no issue when changing to a coarser grind size.

If I change to a finger grind size while the grinder is running, it's not only difficult, but also noisy.

The only solutions I found so far are to open the grinder and clean it thoroughly or to change to a finer grind size using small back and forth increments.

I think the significance of the remaining fragment that is sometimes left behind is overblown

It happens to me 100% of the time when grinding for pourover, and I have to spend at least 20 seconds to clear the fragments to be able to grind finer. Either we have a different definition of "overblown", or your grinder is not showing the same issue.

How is everyone loading their beans? Hot start or cold? I notice the grinder produces many less fines if I slowly add beans after a hot start, to the point where the shot runs 10 seconds faster. I think I may need to add all the beans and cold start to keep it consistent.

I believe people usually like hot start and slow feeding for consistency. Sure, doing the same thing every time is consistent, but it might be better to go this way instead of cold starting it.

boren wrote:It happens to me 100% of the time when grinding for pourover, and I have to spend at least 20 seconds to clear the fragments to be able to grind finer. Either we have a different definition of "overblown", or your grinder is not showing the same issue.

I'm not sure if you mentioned that already but you are making that change from brew to espresso with the grinder running, correct?

Yes, the motor is running, though in a single-dose grinder this should not be required. Even in many on-demand grinders if you grind through the beans you can adjust grind size without having to run the motor and there's no resistance, just like with a clean grinder.