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Thread: Dema.RAL tamper discussion

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    Dema.RAL tamper discussion

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    So since youre here... was this the "revolutionary new design thats supposed to dramatically reduce channelling" youd heard about some time ago?

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by Greg Pullman link=1226934588/0#11 date=1227148433
    So since youre here... was this the "revolutionary new design thats supposed to dramatically reduce channelling" youd heard about some time ago?
    No. *That tamper still hasnt made it to market.

    Angelo has released his tamper with prongs to keep it level, though.

    Cheers,

    Luca

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by luca link=1226934588/0#12 date=1227152191

    No. *That tamper still hasnt made it to market.

    Angelo has released his tamper with prongs to keep it level, though.

    Cheers,

    Luca
    And that tamper made an appearance at the vic barista/latte art comps recently.

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by AndreasM link=1226934588/0#13 date=1227170715
    And that tamper made an appearance at the vic barista/latte art comps recently.
    Sooo... What makes this Tamper distinctive? Any photos or sketches?

    Mal.

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by Mal link=1226934588/0#14 date=1227170939
    Quote Originally Posted by AndreasM link=1226934588/0#13 date=1227170715
    And that tamper made an appearance at the vic barista/latte art comps recently.
    Sooo... What makes this Tamper distinctive? Any photos or sketches?

    Mal.
    I think that Angelos tamper is called the "Demaral." You can google for the web page with the manual. I havent used it yet. The three prongs on the side are supposed to keep the tamper base level. I dont think it goes by pressure; you can set the depth. It feels like a nice hunk of metal.

    Cheers,

    Luca


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    Re: Dema.RAL tamper discussion

    James Hoffman uses one (ripple base tamper) on one of his vomeo vids.

    Although the circles cover the entire surface of the puck.

    [img][img]


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    Re: Dema.RAL tamper discussion

    I think that Angelos tamper is called the "Demaral." You can google for the web page with the manual. I havent used it yet. The three prongs on the side are supposed to keep the tamper base level. I dont think it goes by pressure; you can set the depth. It feels like a nice hunk of metal.

    Cheers,

    Luca

    The only distributor noted on the "Demeral" site is Diamond C Services
    I might call the Brisbane office after things settle down from the recent storms to see if one is available to see and $$ cost

    KK

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by luca link=1226934588/0#15 date=1227180142
    I think that Angelos tamper is called the "Demaral." You can google for the web page with the manual. I havent used it yet. The three prongs on the side are supposed to keep the tamper base level. I dont think it goes by pressure; you can set the depth. It feels like a nice hunk of metal.
    Thanks Luca....

    Very clever. I think the handle wouldnt suit me though, I need something with a bit more width at the top so it will sit in my hand a bit better. Only a small whinge though... ;)

    Mal.

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    Re: Dema.RAL tamper discussion

    was looking at that Demeral tamper a little while ago.... one question though... what happens if you want a real low dose... are you gonna end up with a light tamp cos you cant tamp down far enough? Just a thought. Cool bit of equipment though.

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    Re: Dema.RAL tamper discussion

    Hi Mal. Luca and YeeZa. This is Angelo. Luca Ive known you for a while now, the others I dont Know. The reason behind this tamper is to introduce concistancy across the board for a franchise company or a chain of coffee shops using set doses not grind on demand, yes if you want a real low dose and is outside of your normal range it wont press it but then again if you consistantly drop a low dose you can setup the tamper to this depth. The prototype was first shown to a close friend Milton, 3 months later I showed it to Joseph (Caffenatics) I have two other styles I am working on and will hand delliver to Andreas ("ATMC" Melb") and Con 7 grams Melb. Mal: The handle size is straight out of an Ergonomics hand book, it is to suit the happy medium but custom sizes will be hand turned for the professional/comp barista. Cheers, feel free to e-mail.

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    Re: Dema.RAL tamper discussion

    Regarding the tamper with grooves on the tamping face! This reminds me of Chill Plates used in Sand molds in particular, casting alluminium. Im my time at Comalco research center we used chill plates to controll solidification rates, selecting material, depth and width of grooves in the chill plate resulted in a vast diference in cooling rate, the same principle may apply here, by increasing depth, width and spacing of the grooves you are increasing the surface area therefor increasing the volume of water which first comes in contact with the coffee, and if this is the case would only work well with restrettos as it will take 2-3 seconds for the water to fully saturate 5mm depth into the coffee puck.

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    Re: Dema.RAL tamper discussion

    The "Demaral" looks very interesting from what I could see from the image, I theorize that its design is a useful addition for those who have difficulty tamping on the level (including folks with some sort of physical ailment or disability such as carpal tunnel, etc.) or even in a shop where it would cut down on coffee wasted by unskilled labor. It is one of (if not the only) "innovative" tampers that I would be interested in reviewing.

    The benefits in terms of better espresso of the ripple-bottomed tamper appear questionable. if someone has one of them, try this: tamp as usual, and before locking the PF in place, pour about one-half ounce of hot water into the top of the PF. Allow it to soak in and check the depth of the remaining rings. I would think that coffee does not possess the "structural integrity" (cohesiveness, or whatever you wish to call it) to hold up to the flow of water in such a formation as created by the ridges. But much like crosshatch grill marks on BBQ steak, it looks pretty, but in the case of the espresso, does not visually enhance the final product.

    The most important factor in choosing a tamper is that it fits your hand and allows you to tamp on the level. If it looks good to you, like jewelry, then that is fine as well. I like nice tools, but ones that get the job done affordably I find just as enticing... As long as it works for you, whatever the reason you bought it is what counts. But I doubt that anyone could taste the difference between two espressi made with two different tampers is handled by an experienced barista- home or otherwise.

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    Re: Dema.RAL tamper discussion

    Hi Ang,

    I think that the others are scattered all around Australia, so no real reason why you should know them.

    If youve got any tampers sitting around spare, Id love to give one a try.

    Cheers,

    Luca

    PS. Not sure if I ever got to say nice work on the lights that you put in the FB80 at Cafenatics Suncorp.

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    Re: Dema.RAL tamper discussion

    Hey Angelo

    Good work on the design
    Its good to see someone is thinking outside the square

    Your design will probably help with my machine as I need to tamp 8mm deep for the puck to clear the screen

    Does it come with a convex profile?

    KK


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    Re: Dema.RAL tamper discussion

    Hi KK, Yes it will be available with a convex tamping face, I can see you are one of the few to keep clear of the shower screen.
    As soon as the toolmaker is finished with the profile cutting tool Ill make a few and let you know how thay went. I do need to know basket diameter, How deep is the Groove on the basket from the top and is the groove inwards.

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    Re: Dema.RAL tamper discussion

    Hi Luca. You like the way the lights are activated by the touch pad? And turn off when the pour is finished. Its amaizing what you can do with low voltage, low profile miniture down lights. If you still hang around that place (bond st), ask Milton for my new mobile number, will talk a bit more about the tamper. Show him this page if you have to.

    Cheers.

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by Angelodem link=1226934588/20#20 date=1227323476
    Hi Mal. Luca and YeeZa. This is Angelo. *Luca Ive known you for a while now, the others I dont Know. The reason behind this tamper is to introduce concistancy across the board for a franchise company or a chain of coffee shops using set doses not grind on demand, yes if you want a real low dose and is outside of your normal range it wont press it but then again if you consistantly drop a low dose you can setup the tamper to this depth.
    Hi Angelo,
    I was talking about this tamper the other day praising its seeming ability for it to be used in a commercial environment where doses are set. Itd be great for consistency with this. I look forward to seeing it in the flesh one day and having a play. Its great to see new products come out with new innovations. Great looking piece of kit.

    Dan

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    Re: Dema.RAL tamper discussion


    I had a play with these at the Diamond C stand at Fine Foods a couple of months ago. Very neat design and I can see their place in commercial trade.




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    Re: Dema.RAL tamper discussion

    Hi all.
    I read all of your feedback with attention, as I can not "play" with tampers here in Greece.
    I had two RB tampers for many years,and last month, I bought one Macap CPS automatic tamper, at 260+20=280.00Euros,because I had a pain in my hand.
    The result? My espresso cup, is way better.
    Of course, I can not compare this, with other tampers, other than RBs I had.
    But the price, is an issue for sure.

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    Re: Dema.RAL tamper discussion


    The very shy Michael Agrotis from Diamond C is the hand model in this shot.

    ;)




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    Re: Dema.RAL tamper discussion


    Diamond C are the distributors of these and we have a lot of site sponsors to the left that buy wholesale from them. I expect that you will see them being offered soon.

    The only gotcha that noticed was the demo ones had pretty long handles. Custom handles or a choice of short, medium and long handles might be needed to cover the range of hand sizes in the market place but really, you can tamp with a clenched fist with these and it comes out the same!




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    Re: Dema.RAL tamper discussion

    I like the idea of the tamper that keeps the tamp straight, with changeable pressure too! Great for training.

    I think for experienced people it would make it difficult to see and feel what is going on. I constantly change my pressure and/or dose, especially when my grind is between clicks on my grinder. Keeping it level is all to do with a good technique and the rings on the side of the tamper give a good quick check.

    Im off to test the ripple base tomorrow. I got delayed with a trip to Tokyo. Gave me a good chance to try out Paul Bassetts cafe!

    Ill be taking some photos of the different tampers, some wet pucks and a bit of my art while Im at it. Also tasting and timing notes.






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    Re: Dema.RAL tamper discussion

    Any chance that the company manufacturing the ripple base tamper aslo produces (or got the idea from) those non slip stainless things on sidewalks everywhere???

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    Re: Dema.RAL tamper discussion

    I dont reckon they make the things on the sidewalks / footpaths but its anyones guess where the idea came from. Either way theres no doubt they make for a pretty puck though.

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    Re: Dema.RAL tamper discussion

    Yeah the whole dropping a stone in a pond comes to mind... dont know if Reg saw those little nubs on the sidewalk in the US haha

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    Demaral Tamper

    hi,

    Can someone tell me their experience with Demaral Tamper? Anyone selling it in Sydney?

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    Re: Demaral Tamper

    Di Bartoli have them.
    http://www.dibartoli.com.au/product_details.asp?pid=402

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    Re: Dema.RAL tamper discussion

    Do the Demaral tampers press low enough for the slayer does anyone know?? Just concerned when lower dosing that it will not reach :D Dont want to spend the money if its not going to work right. However i could use it on the gb5 but thats only one day a week... Help please!! :)

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by 1E3D2E2E3D3F375C0 link=1226934588/36#36 date=1268529636
    Do the Demaral tampers press low enough for the slayer does anyone know?? Just concerned when lower dosing that it will not reach :D Dont want to spend the money if its not going to work right. However i could use it on the gb5 but thats only one day a week... Help please!! :)
    Cant answer the question, but if you can operate a slayer to its full potential, it seems strange that you would you need a tamper with training wheels?

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by 61404B4B4C56250 link=1226934588/37#37 date=1268530795
    Quote Originally Posted by 1E3D2E2E3D3F375C0 link=1226934588/36#36 date=1268529636
    Do the Demaral tampers press low enough for the slayer does anyone know?? Just concerned when lower dosing that it will not reach :D Dont want to spend the money if its not going to work right. However i could use it on the gb5 but thats only one day a week... Help please!! :)
    Cant answer the question, but if you can operate a slayer to its full potential, it seems strange that you would you need a tamper with training wheels?
    Im with Den on that one...I havent seen or used one, but isnt the whole idea that its adjustable for height? :-?

    I heard a story yesterday of a a cafe in a popular Victorian coastal town cafe all loaded up with Synesso...and serving dishwater....

    Just goes to prove that if you have a Ferrari but drive it on "L" plates, youre still a learner ;)

    Chris

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by 5A6F6265514D6168686B6B0E0 link=1226934588/38#38 date=1268531772
    I heard a story yesterday of a a cafe in a popular Victorian coastal town cafe all loaded up with Synesso...and serving dishwater....
    chris - my moneys on the burger joint in lorne... ;)

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by 5B786B6B787A72190 link=1226934588/36#36 date=1268529636
    Do the Demaral tampers press low enough for the slayer does anyone know?? Just concerned when lower dosing that it will not reach
    Short answer is yes it will work as it has a fair amount of adjustment built in (although I dont have spare Slayer here to test it!)

    Longer answer is: Even if there is not enough adjustment then Angelo from Demaral will custom build one to suit.

    That is the real beauty of working with companies like Demaral or Pullman, they are local and responsive to customer demands and can even create a one-off item to suit if required.
    (I know because both have made me odd sized tamps in the past)

    8-)

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by 25040F0F0812610 link=1226934588/37#37 date=1268530795
    Quote Originally Posted by 1E3D2E2E3D3F375C0 link=1226934588/36#36 date=1268529636
    Do the Demaral tampers press low enough for the slayer does anyone know?? Just concerned when lower dosing that it will not reach :D Dont want to spend the money if its not going to work right. However i could use it on the gb5 but thats only one day a week... Help please!! :)
    Cant answer the question, but if you can operate a slayer to its full potential, it seems strange that you would you need a tamper with training wheels?
    :)Tamper with training wheels! Demaral Tampers are the only tampers you can use to compare a machines capabilyty against another, *eg:any machine with an E61 group can be truely compared against each other as this tamper eliminates errors in flatness and pressure, it has been used to compare a La Marzocco to a Synesso and to illustrate the consistancy of the drop from a Mazzer dosing chamber compared to that of a BNZ. A coffee roaster used it to illustrate the concistancy of their roast between batches, a franchisee was left dumbfounded when i asked him to pick a *shopper to come behind the counter and make her own coffee, after a short course in dosing and placing the handle in the group, she made the best cup of coffee the franchisee had seen come out of his machine.
    Not so bad for a tamper with "Training Wheels"
    Im not saying this tamper is for everyone, but thank god we live in a country where we are free to choose.
    ;) Yes the Demaral tamper has a 12mm travel and by using a 10mm thick base the total depth can be 14mm.

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    Re: Dema.RAL tamper discussion

    Im sorry, but Im obviously missing a lot in your explanation, and the capability of the Demaral.

    Quote Originally Posted by 527D74767F7C77767E130 link=1226934588/41#41 date=1268651284
    any machine with an E61 group can be truely compared against each other as this tamper eliminates errors in flatness and pressure
    Perhaps...provided dosing and time of extraction are equivalent, and the machines set up correctly. In other words the tamp is just one step in the process, not the be all and end all.

    Quote Originally Posted by 527D74767F7C77767E130 link=1226934588/41#41 date=1268651284
    to illustrate the consistancy of the drop from a Mazzer dosing chamber compared to that of a BNZ
    Quote Originally Posted by 527D74767F7C77767E130 link=1226934588/41#41 date=1268651284
    to illustrate the concistancy of their roast between batches
    If it can do that, particularly the latter, I want one!

    Quote Originally Posted by 527D74767F7C77767E130 link=1226934588/41#41 date=1268651284
    a franchisee was left dumbfounded when i asked him to pick ashopper to come behind the counter and make her own coffee, after a short course in dosing and placing the handle in the group, she made the best cup of coffee the franchisee had seen come out of his machine.
    I dare say most customers could probably pull a better shot with a basic machine, using the palm of their hand to tamp, than the coffee served at any franchise.

    Having said all that, I also think the Demaral is clever, as it eliminates some variables.


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    Re: Dema.RAL tamper discussion

    There are many Manufacturers producing machines with E61 groups (BFC, ECM, Expobar, so on and so on) 90% are sourced through the same manufacturer, making them the same. The reference point being the depth of the shower into the group handle busket is "the same for all of them". A customer can walk into a shop with the Demaral tamper and compare the diferent makes of machines (Most good retailors have machines you can try before you bye).
    After adjusting the tamper for an E61 group, the depth it travels is the same therefor the pressure (Load) is the same for which ever machine you are testing, and assuming you are using the same coffe blend and grinder you should be able to see the difference between makes. (They may have the same E61 group but boiler size, heat exchnger size, Hydraulics, and Thermodynamics of the whole system are different) even the way an epension valve is set to open up will be different from one manufacturer to an other.

    Your last coment is a little unfair to the Francisers who spend thousends of $$ per anum on training and QA. Perhaps outlets like Coffee HQ, Caffenatics (Both usrers of La Marzocco) on most sites, Hudsons Coffee and many others will objet to tamping with the palm of the hand. You are to quick to blame the method, there are other factors in producing a bad coffee, ( Machine service or lack of it, poor choice of blend, Machine not set correctly to the blend, crappy burrs on grinder, The list is long, and I dont have the time to teach any one any more.

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by 4E61686A63606B6A620F0 link=1226934588/43#43 date=1268687187
    The reference point being the depth of the shower into the group handle busket is "the same for all of them"
    I am not so sure about that....We sell a number of different e-61 brands and the depth of the shower screen and basket anatomy do vary between brands...

    Without having used the tamper, I see how the dose height will be the same when used with a particular basket/shower screen combo.

    Achieving identical pressure, pre-supposes exactly the same dose which is challenging to achieve regardless of technology/skill. To extrapolate that across a variety of different brands, even if they are all e-61 and then declare that the only reasons for any perceived difference in the cup are the anatomy and calibration of the machine is a pretty big generalisation IMHO *:-?.

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by 436269696E74070 link=1226934588/42#42 date=1268652950
    I also think the Demaral is clever, as it eliminates some variables.
    Me too.

    Quote Originally Posted by 466960626B6863626A070 link=1226934588/43#43 date=1268687187
    there are other factors in producing a bad coffee, ( Machine service or lack of it, poor choice of blend, Machine not set correctly to the blend, crappy burrs on grinder, The list is long, and I dont have the time to teach any one any more.
    Dema.RAL Tamper this is Coffee Snobs; I think a lot of us here already know whats on that list.

    Quote Originally Posted by 466960626B6863626A070 link=1226934588/43#43 date=1268687187
    Your last coment is a little unfair to the Francisers who spend thousends of $$ per anum on training and QA.
    How much is spent on training doesnt guarantee a good result.
    I train (not coffeee) and Im in QA, so I understand both QA and training.
    Passion to learn makes the difference.

    I dare say I could make a better coffee tamping with the palm of my hand than most coffee franchises.

    And to reiterate, I like the idea of your tamper as it does eliminate some variables. Its a step in the right direction for better coffee everywhere.


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    Re: Dema.RAL tamper discussion

    I think that one should not over generalise to the for or against camp without first trying the said item

    It would be prudent to trial it first and then make an assessment and report on it ;)

    KK

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    Re: Dema.RAL tamper discussion

    As previously stated many times, this tamper was specifically designed to "Bring up the coffee standerds in a franchise store" and "Maintain a level of acceptance" throuhout the day regardless of the user.
    Im sure the new design from Demaral aimed at the professional barista will get all of your tounges wagging, leave you froffing from the mouth and asking "what next"?
    July-August 2010
    Andy Freeman and Di Bartoli Coffee will be the first to receive one and Coffee Kosmo (If i knew his mailing address)

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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by 507F76747D7E75747C110 link=1226934588/47#47 date=1268707486
    As previously stated many times, this tamper was specifically designed to "Bring up the coffee standerds in a franchise store" and "Maintain a level of acceptance" throuhout the day regardless of the user.
    Im sure the new design from Demaral aimed at the professional barista will get all of your tounges wagging, leave you froffing from the mouth and asking "what next"?
    July-August 2010
    Andy Freeman and Di Bartoli Coffee will be the first to receive one and Coffee Kosmo (If i knew his mailing address)
    He will let ya know I am sure ;D And its Koffee Kosmo..

    PS... Available in 54.5mm ?

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    Re: Dema.RAL tamper discussion

    Having spent 15 years in QA (Automotive Industry) and a further 5 years at Comalco Research Center as a foundry technologyst, the symbol n comes to mind, " Sample size", this seemingly insignifficant symbol (n) *is required to workout, UCL, LCL, (Upper and lower control limits), p-charts, and standerd deviation calculations, before rejecting a batch and bringing a multi million$$ a day production line to a holt.

    And what is missing from most of the site members that have made a coment? "n".
    Dont assume anything, as the old saying goes, assume makes an !!!!!!!!!!!!!!!!!!!!!!!!!


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    Re: Dema.RAL tamper discussion

    Interesting read and tamper.

    Recent job I had one girl working for me that was a newbie to even using a tamper. Good milk skills but where she worked they used the psuedo tamper on the front of their grinder ::) (Guess where I dont drink a coffee) Even though I had shown her carefully where to dose to and how to use the fitted Pullman Tampers a few times over the weekend I still pulled her up as she had managed to jam the tamper at an angle into the basket and was about to lock in. The resulting shot would have certainly channeled and been rubbish.

    If your working in a high volume operation with electronic dosing grinders and newbie or semi trained or even nuff nuff staff then I reckon they look like a great idea for improved consistancy in the cup. Maybe even consider doing a small press version like one or two of the pressure based ones?

    As to a snob getting and using one maybe not, I still like control ;)

  43. #43
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    Re: Dema.RAL tamper discussion

    I think Angelo needs a clap on the back for designing and manufacturing what is truly an innovative tamper for a market in need of some help. While most of the top echelon manufacturers strive to develop products that appeal to as wide an audience as possible, the simple fact is its impossible to make a product that is all things to all people because everyones needs are different.

    As he states in post 36, the Dema.RAL tamper isnt primarily directed at snobs - its directed at coffee chains who dont know much about tamping and its in that environment its worth needs to be assessed. True its being spoken about here on CS where we ARE snobs; but all discussions need to be viewed in the context of the products target audience. So lets not talk it down just because its not what wed personally choose, when chances are were not even in the market it was primarily made for.

    Greg

  44. #44
    Sleep is overrated Thundergod's Avatar
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    Re: Dema.RAL tamper discussion

    Quote Originally Posted by 0C232A2821222928204D0 link=1227148434/38#38 date=1268859641
    And what is missing from most of the site members that have made a coment? "n".
    Dont assume anything, as the old saying goes, assume makes an !!!!!!!!!!!!!!!!!!!!!!!!!
    I didnt mention sample size but hope you dont think Im an !!!!!!!!!!!!!!!!!!!!!!!!!

  45. #45
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    Re: Dema.RAL tamper discussion

    Never! Thundergod, just a simple observation, and good old Flemington (Vic) 70s education.
    And I thank you Greg.
    Now! Reg Barber Tampers, US & Euro Curves, has anyone noticed the way the curve is dimentioned on his web site? By looking at this dimention as a constant, sugests that "as you reduce the diameter of the tamper the profile of the radious changes" not so critical when droping from 58 mm diam to 57mm diam, but have a look at how mutch the profile changes from a 59mm diam to a 53 mm diam. Basic Geomatry or Metrology would sugest the radious needs to be the constant in order to keep the profile the same for all sizes. ;)

  46. #46
    Site Sponsor pullman's Avatar
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    Re: Dema.RAL tamper discussion

    [s]I think the profile needs to change in that way - the important thing is actually the ratio of curvature to the diameter, not simply how far the centre of the curve is above the flatline, but as most tampers are 58mm they get stated in mm terms.[/s]

    For example: a 1.5mm high curve on a 58mm tamper is a H:D ratio of 1:38, while on a 50mm tamper a 1.5mm curve drop to 1:33. So youre making the effect of the curve greater by maintaining a fixed degree of extension and reducing the diameter. Its preferable in my view to keep the ratio as close to the same as possible so if someone orders a US (or Euro) curve tamper, the effect of the convexity is the same regardless of the diameter of the tamper even though the extension above flatline may change.


    Sorry misunderstood your point Angelo. What we do is start with a curve on a 58mm tamper and if the diameter reduces then some of the curve gets removed at the same time, thereby maintaining the same profile. At least in our books, the 1.5mm / 3.5mm terms for US and Euro respectively apply to the amount of curvature on 58mm units, and that the curvature ratio mentioned above remains the same for smaller units even though the amount of extension above flatline reduces.

    Id be surprised if Reg does it differently but I could be wrong.

    Greg

  47. #47
    Senior Member Dennis's Avatar
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    Re: Dema.RAL tamper discussion

    Actually I cant find what youre referring to on Regs website, but believe I understand what you are referring to regarding radius.

    Presuming you are correct in that the radius varies, have you considered the remote possibility that Reg might just like doing things his way, and that varying the radius may possibly be beneficial when using say, a 53mm basket?

    I dont think its very productive to take a swipe at someone who is highly regarded around the World for his product, particularly when its unlikely that hes reading this thread.


  48. #48
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    Re: Dema.RAL tamper discussion

    I reckon its the image on http://www.coffeetamper.com/store/pc/products.asp on the right side near the bottom that Dema.RALs referring to Dennis.

  49. #49
    Senior Member Dennis's Avatar
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    Re: Dema.RAL tamper discussion

    Thanks Greg....I see it now, and my earlier comment still stands.


  50. #50
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    Re: Dema.RAL tamper discussion

    Behmor Brazen - $249 - Free Freight
    Sorry Dennis, Im not trying to have a swipe at Reg! It may be an oversight on his behalf or just a generalisation.

    The formula for working out the radious is as folows.

    r=Csqd+4xhsqd/8xh
    therefor for: "h" US curve 1.661mm as shown on his site, C= diam, not shown.
    r =58x58+{4(1.661x1.661)} / 8x1.661
    rounded to two decimal places, r= 253.99mm, so on an NC lathe you would program this radious in as a contant for all diamater.

    Changing the radious for different diameters, wouldnt this change the way the coffee ground is distributed in the busket. a shalow curve would distribute more down force, a steeper curve would increase concetrated forces towards the sides of the busket.
    :) This is a discusion, Im not having a go at anyone.




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