Eureka Atom Specialty 75 - an opinion - Page 7
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- Posts: 552
- Joined: 9 years ago
I purchased from Clive. They've treated me well on several purchases. I purchased the burrs at time of order, so it will ship with them. I may buy SSP burrs at some point, but I'm not worried about that now.GregoryJ wrote:Where did you order from? Do the Mythos burrs come pre-installed on the grinder?
- GregoryJ
- Posts: 1069
- Joined: 6 years ago
There is a difference between the Mythos burrs and the Titanium coated Eureka burrs, correct?
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- Posts: 552
- Joined: 9 years ago
As Nuovo Simonelli owns Eureka, it is my understanding that these are the actual TiN Mythos burrs. The packaging seems to confirm this. The only reason I would move up to Red Speed coated would be on a set of SSP burrs, as without a geometry change I do not believe I'd see any difference between the lubricity of TiN vs TiAlCN. I used to work in a niche precision machining industry and understand these surface treatments well.
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- Posts: 8
- Joined: 16 years ago
I purchased a Eureka Atom Specialty 75 in Chrome about six months ago. It is a special request item so I had to wait a couple of months for a new production run. Mine came with the standard burrs but I purchased a set of the red-speed burrs and they were installed at my supplier when they checked out the machine before I could pick it up.
Previously I had used a Mazzer Mini Doser Electronic for ten years, a Rancilio MD-40 for about five years and a Baratza for a couple of years. The Specialty 75 will grind 18 grams for my La Marzocco Linea Mini (new version that is one month old) in about 3.5 seconds. It will vary depending on the bean and how many days since roast but it varies between 3.3 and 3.6 seconds. Not much variation in one day but this takes place over about ten days. The Mazzer would take about 22 seconds and would vary quite a bit more. I replaced burrs a couple of times over the years and there was only a small timing difference between the old burrs and the new burrs.
The area that is improved the most other than the much improved speed is the consistency of the grind and the lack of a need for a dispersion tool. The Mazzer was always needing help from a dispersion tool in the years that I used it with my Londinium R. It put out quite a few clumps that I just don't see with the Specialty 75. When I have looked closely with the new grinder I found a few small clumps but the only reason that I noticed was that I had watched an online review about the Peak and how it didn't have any clumps. I felt that the Specialty 75 didn't have any at all either, but upon close inspection I can't say that the grind is perfect. There are a few small clumps but emphasis on the word small.
I don't seem to suffer from much retention ever but I haven't disassembled it so perhaps there is some hidden inside. I have set my single shot to 0.2 seconds to clear any old beans before a first shot of the day and if I run it manually for a moment, it has very little come out, once the bean hopper is empty, giving the impression of little to no retention. Vast improvement over the Mazzer.
In Canada this machine is $1899.00 in Chrome. The Peak is almost twice that price and is not quite as fast. I have to say that I am very happy with this grinder as it is a large upgrade over my Mazzer and is the best grinder that I have used, by a good margin. Over the last twenty years I have had time with other grinders as well but not the Peak or K30 or EK43. I feel that the Peak May be a bit better but the difference would be slight.
I use my grinder for espresso based FP drinks and my favourite roast is a light medium to medium roast.
Lastly, I purchased mine at Espressotec in Vancouver. They are the best supplier in Vancouver from my experience. They have good stock of several brands and serve both commercial and home users.
Previously I had used a Mazzer Mini Doser Electronic for ten years, a Rancilio MD-40 for about five years and a Baratza for a couple of years. The Specialty 75 will grind 18 grams for my La Marzocco Linea Mini (new version that is one month old) in about 3.5 seconds. It will vary depending on the bean and how many days since roast but it varies between 3.3 and 3.6 seconds. Not much variation in one day but this takes place over about ten days. The Mazzer would take about 22 seconds and would vary quite a bit more. I replaced burrs a couple of times over the years and there was only a small timing difference between the old burrs and the new burrs.
The area that is improved the most other than the much improved speed is the consistency of the grind and the lack of a need for a dispersion tool. The Mazzer was always needing help from a dispersion tool in the years that I used it with my Londinium R. It put out quite a few clumps that I just don't see with the Specialty 75. When I have looked closely with the new grinder I found a few small clumps but the only reason that I noticed was that I had watched an online review about the Peak and how it didn't have any clumps. I felt that the Specialty 75 didn't have any at all either, but upon close inspection I can't say that the grind is perfect. There are a few small clumps but emphasis on the word small.
I don't seem to suffer from much retention ever but I haven't disassembled it so perhaps there is some hidden inside. I have set my single shot to 0.2 seconds to clear any old beans before a first shot of the day and if I run it manually for a moment, it has very little come out, once the bean hopper is empty, giving the impression of little to no retention. Vast improvement over the Mazzer.
In Canada this machine is $1899.00 in Chrome. The Peak is almost twice that price and is not quite as fast. I have to say that I am very happy with this grinder as it is a large upgrade over my Mazzer and is the best grinder that I have used, by a good margin. Over the last twenty years I have had time with other grinders as well but not the Peak or K30 or EK43. I feel that the Peak May be a bit better but the difference would be slight.
I use my grinder for espresso based FP drinks and my favourite roast is a light medium to medium roast.
Lastly, I purchased mine at Espressotec in Vancouver. They are the best supplier in Vancouver from my experience. They have good stock of several brands and serve both commercial and home users.
- MikFlores300
- Posts: 98
- Joined: 7 years ago
The red speed coated burrs from Eureka aren't the same as SSP Mythos burrs. I upgraded my Atom 75 to SSP red speed Mythos burrs, and I have to say it's a worthwhile upgrade. Light roast coffees pull really well and have some forgiveness.
I do notice about 3-4g of dynamic retention. So, when single-dosing, I need to purge about that much when making adjustments for the next dose to grind on that setting. Once it's dialed it, it's easy to dose in/out the same mass within .5g. For the price, it's worth the troubles. And, if I have a large gathering, I can drop the hopper in and sling spro like no tomorrow.
I do notice about 3-4g of dynamic retention. So, when single-dosing, I need to purge about that much when making adjustments for the next dose to grind on that setting. Once it's dialed it, it's easy to dose in/out the same mass within .5g. For the price, it's worth the troubles. And, if I have a large gathering, I can drop the hopper in and sling spro like no tomorrow.
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- Posts: 552
- Joined: 9 years ago
From what I understand SSP changes the profile and tooth count as compared to the Mythos set. I may at some point order the SSP burrs, but I'm not in a hurry. The grinder performs excellent with the TiN Mythos set.
- GregoryJ
- Posts: 1069
- Joined: 6 years ago
I got some cheap beans from Amazon (actually Amazon branded) labeled as "Colombia Medium Roast". They are very oily, and shots had a very ashy / cigarette flavor. I got the beans to help break in a new Atom 75 grinder. I had run about 1 lb of beans through before this. I recorded the dose consistency for 10 grind cycles as I ground these cheap beans through. (Note this is just dose to dose consistency, and not retention). I recorded data for 3 cases:
Single dosing: I put a weight of beans in and measured the weight out. The actual dose weight varied (~14.32-18.35g) but I normalized everything to 16.00g so I could plot it on a graph. I didn't do any RDT or huffing and puffing, just ground the beans for ~8 seconds until the stream of grinds is almost gone. The grinds come out warm to the touch.
Full Hopper, Setting 9, 3.0 seconds: Fill the hopper up, grind for 3.00 seconds and measure the output.
Full Hopper, Setting 8 (finer grind), 3.0 seconds: Same as above, but at a finer grind. Less coffee comes out for a given time.
The only comments I have is that the standard deviation for single dosing was 0.32g, but there were a couple of outliers. I may try RDT to see if this comes down, but I think this is actually workable for non-picky coffees. The timed dosing output reacts strongly to the grind size, so it is hard to set the timer before dialing in the grinder.
Single dosing: I put a weight of beans in and measured the weight out. The actual dose weight varied (~14.32-18.35g) but I normalized everything to 16.00g so I could plot it on a graph. I didn't do any RDT or huffing and puffing, just ground the beans for ~8 seconds until the stream of grinds is almost gone. The grinds come out warm to the touch.
Full Hopper, Setting 9, 3.0 seconds: Fill the hopper up, grind for 3.00 seconds and measure the output.
Full Hopper, Setting 8 (finer grind), 3.0 seconds: Same as above, but at a finer grind. Less coffee comes out for a given time.
The only comments I have is that the standard deviation for single dosing was 0.32g, but there were a couple of outliers. I may try RDT to see if this comes down, but I think this is actually workable for non-picky coffees. The timed dosing output reacts strongly to the grind size, so it is hard to set the timer before dialing in the grinder.
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- Posts: 66
- Joined: 6 years ago
With a fully cleaned grinder....16 grams in and 12.6 out so 3.4 grams of total retention
subsequent shots were like this:
IN | OUT | Difference
16.0 | 16.0 | 0
16.1 | 16.2 | 0.1
16.1 | 15.9 | 0.2
16.0 | 15.7 | 0.3
Then I opened the Grinder to give it another clean
Decided to do another test without the clump crusher...16 grams in and 13.4 out so 2.6 grams of total retention
IN | OUT | Difference
16.0 | 15.5 | 0.5
16.1 | 16.1 | 0
16.1 | 15.7 | 0.4
16.0 | 15.7 | 0.3
Overall it was a bit cleaner, next week I'm going to test it with the "blow up" hopper
subsequent shots were like this:
IN | OUT | Difference
16.0 | 16.0 | 0
16.1 | 16.2 | 0.1
16.1 | 15.9 | 0.2
16.0 | 15.7 | 0.3
Then I opened the Grinder to give it another clean
Decided to do another test without the clump crusher...16 grams in and 13.4 out so 2.6 grams of total retention
IN | OUT | Difference
16.0 | 15.5 | 0.5
16.1 | 16.1 | 0
16.1 | 15.7 | 0.4
16.0 | 15.7 | 0.3
Overall it was a bit cleaner, next week I'm going to test it with the "blow up" hopper
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- Posts: 71
- Joined: 4 years ago
Apologies if this has already been covered here, but my question is:
Is it possible to make very small grind adjustments on the Atom 75? The grind adjustment knob looks to have quite coarse adjustment intervals - as in a very small turn of the knob might produce a large adjustment in grind.
Is it possible to make very small grind adjustments on the Atom 75? The grind adjustment knob looks to have quite coarse adjustment intervals - as in a very small turn of the knob might produce a large adjustment in grind.
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- Posts: 179
- Joined: 5 years ago
It's a stepless grinder, you can easily make minute adjustments. The intervals on the adjustment knob are just for reference. From factory, zero doesn't even mean zero usually, unless you reposition the sticker.