Mahlgut grinder (Kind of Pharos-ish) - Page 24
- grog
- Posts: 1807
- Joined: 12 years ago
Burrs are breaking in quickly. The zero point is already one full mark back from where it started. As a result my settings for the Cremina have gone from 7.0-7.5 to 8.5-9.0. The grind scale doesn't appear to be moveable but I won't worry about that until I'm confident the burrs are seasoned to the point that I'm not making dramatic adjustments so frequently. It's interesting that this has happened after only a week of use, perhaps 2-3 shots ground per day. I've been mostly grinding beams that are around a City roast level, but I've got some Kimbo Superior Blend coming in this week. Very curious to see how that does in the Grist - plus it's been close to a year since I've worked through a bag of a traditional Italian espresso blend so I'm looking forward to seeing if I still like these comfort blends as much as I recall.
LMWDP #514
- vilseiprairien
- Posts: 75
- Joined: 9 years ago
If one simply must have the scale adjusted to "true zero," one possibility would be to adjust the height of the nylon washer. Meaning, install a thicker one and then remove material (or add shims) until the scale is "zeroed in." I would hope there's an easier way to do this though...
...But I'll cross that bridge when I come to it.
...But I'll cross that bridge when I come to it.
- grog
- Posts: 1807
- Joined: 12 years ago
I don't care that much about having the scale at 'true zero', since once the burrs are well seasoned, I won't be making major adjustments anyway. I don't plan on using the Mahlgut for anything but espresso so I'll just be shifting slightly around for different beans.
LMWDP #514
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- Posts: 1315
- Joined: 9 years ago
Braking in can certainly cause for a change in grind setting in my experience, but the actual zero point changing doesn't seem to make sense to me, certainly not by one whole setting. If you find what type of thread you have-by finding the appropriate nut thread size, then you can easily calculate how much change in height one full revolution is and see if one notch ( or 1/x of a full revolution) is a reasonable change in height from break-in. Unless there was some sort of "Chad" hanging on the burr I can't really imagine such a height change from break-in (almost made a Florida joke but restrained)
Yes, i you per this on an iPhone
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- Supporter ♡
- Posts: 2483
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It would be if the zero point is defined by burrs touching rather than locking. I constantly get confused when people are discussing about their zero point - are they referring to burrs locking or touching/rubbing? So which one are we pointing to here?day wrote:Braking in can certainly cause for a change in grind setting in my experience, but the actual zero point changing doesn't seem to make sense to me
- vilseiprairien
- Posts: 75
- Joined: 9 years ago
All this has me intrigued. I'll have the answers when mine arrives, but just thinking about it makes me impatient. Any volunteers to satisfy my curiosity and impatience? Is the zero point on the Mahlgut set to burrs rubbing, or burrs locking? And what is the thread pitch on the adjustment mechanism? I'm guessing it's a 12 mm diameter?
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- Posts: 133
- Joined: 9 years ago
If I were to pull up on the shaft and just free spin the pointer down, it would go to about -1. When i put the pointer on the zero mark, the burr can't move though. At +1, it moves very slightly.
- grog
- Posts: 1807
- Joined: 12 years ago
I'm referring to zero as when I turn the set screw / collar combo clockwise - not pulling up on the burr shaft - until I can't tighten it any further. This is the same way I thought of zero on the Pharos - burr lock, not touch. Upon assembly, this was dead on the 'factory' zero mark on the scale, very precisely. But as I found the same setting to be choking my Cremina after a few days (when at first it was an ideal flow rate), I 're-zeroed' and discovered I could go back to '19' to zero it out.
I agree it is odd. At first I assumed I hadn't adequately tightened the set screw and it was drifting mid-grind, but have determined that isn't the case. I suppose the scale could have moved and I didn't notice but that seems highly unlikely and I can't move it by intentionally trying to do so.
At any rate, it hasn't impacted the grind quality. Consistency of particle size still looks as impressive as from first use, and alignment is still rock solid on point. It's more of a curious development than any sort of real issue.
I agree it is odd. At first I assumed I hadn't adequately tightened the set screw and it was drifting mid-grind, but have determined that isn't the case. I suppose the scale could have moved and I didn't notice but that seems highly unlikely and I can't move it by intentionally trying to do so.
At any rate, it hasn't impacted the grind quality. Consistency of particle size still looks as impressive as from first use, and alignment is still rock solid on point. It's more of a curious development than any sort of real issue.
LMWDP #514