Okay, here are my two babies...(excuse my GP - I probably should have given him a quick polish beforehand...its amazing how you dont notice something until you have it in close up!)
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Dema.RAL tamper discussion
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Re: Dema.RAL tamper discussion
Okay, here are my two babies...(excuse my GP - I probably should have given him a quick polish beforehand...its amazing how you dont notice something until you have it in close up!)
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Re: Dema.RAL tamper discussion
Originally posted by 406771637B080 link=1227148434/95#95 date=1272601512considering the camera is almost worth as much as my Maver!
More to the point - your life is worth more than both
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Re: Dema.RAL tamper discussion
Thanks Rusty - I gave that a go but it keeps on coming up with Card Reading Error, so I figure I better leave it alone for the moment, considering the camera is almost worth as much as my Maver!
Cheers
Di
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Re: Dema.RAL tamper discussion
If your PC has a card reader or you have a plug-in card reader you can take the card out of the camera and plug it into the PC.Originally posted by 486F796B73000 link=1227148434/93#93 date=1272599656Ill post photos later, but Ive taken them with Petes new flash (pun intended!) Digital SLR and have no idea where the cable is to transfer them on to the computer, so theyll have to wait until he gets home from work tonight.
Dont tell Pete I told you if you stuff it up :
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Re: Dema.RAL tamper discussion
Have just finished making a coffee with my new Vibrant Green Demaral Tamper and shes a beauty!
Ill post photos later, but Ive taken them with Petes new flash (pun intended!) Digital SLR and have no idea where the cable is to transfer them on to the computer, so theyll have to wait until he gets home from work tonight.
I really love the feel of this tamper and, on initial use, have absolutely nothing negative to say about it at all.
I was extremely lucky (or it was fortuitous and preplanned because Angelo had some knowledge of Mavers...if so, thanks Angelo!) that the tamper was set to the perfect level already so I didnt need to adjust it at all. I did my normal dosing - one thing Ive got really down pat with my technique and fortunately straight index finger to level off - and away I went with the Demaral.
I had one of the nicest pours out of my Maver so far, I have to say.
Well done, Angelo, on what I think it a great design for us numpty home baristas who are too short to do a straight forearm tamp unless they stand on their tippy toes!
:-*
Cheers
Di
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Re: Dema.RAL tamper discussion
Fair enough. It took years for Harrison to produce consistent enough springs for him to win the Longitude prize.
Im guessing, then, that one of the reasons you investigated adjustable force designs was to allow for dialling in vs spring rate tolerances.
Could an elastomer be used instead of a spring?
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Re: Dema.RAL tamper discussion
Hi Kannage.
The problem in the past has been the selection of the spring. The spring that I have decided to use has a wire cross section diameter thin enough to maintain a preloaded force of 10 to 20 N thus only requiring a mass load of 1 to 2 kg (9.8N = 1kg) to initiate and maitain this load over the full length of the stroke, what this does is place the operator in control it allows them to "Feel" what is taking place.
The spring I use has a "nominal" load rate, if I was to use a spring with a toleranced load rate the cost of the spring would be 5x the cost, due to sample load testing the springs before and after heat treatment .
All the designs I imagined were simple enough at first glance, but when you throw in the most inportant variable "The end user" its a whole new ball game.
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Re: Dema.RAL tamper discussion
Click-Mats dont work that well with tamper stands.Originally posted by 644345424F360 link=1227148434/88#88 date=1271313096Hey that sounds great but could be a bit complex to design without infringing the Espro patent :
I think it would be cheaper to use the Dema.RAL in conjunction with a Click-Mat.
It could be made simpler than the Espro by just having a spring mechanism using a 10N/mm rate spring with 11mm of preload and 1mm of alllowed movement between the tamper shaft and the disc. Then as soon as the shaft began to move independantly of the disc, you would know that you had reached 110N of force (assuming that the length has been set long enough not to bottom out) and when the shaft and disc lock again then you would have reached 120N of force on the puck. Both points should be pretty easily detectable so you only have a small range of error if you tamp until the shaft/disc assembly begins to compress.
I feel that adjustability of the force isnt necessary as the key is consistency but by allowing for the preload to be adjustable, you would be able to vary the force range indicated by the tamper (of course, adjustment would add further complexity/cost).
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Re: Dema.RAL tamper discussion
Hi Greg.Originally posted by 242E2E212E282A4F0 link=1227148434/87#87 date=1271297304Hi Angelo
Greg said!
Have you looked into what the extra cost would be added if the tamper was given a pressure click operation like an Espro sitting above the current setup?
I have tried to use different designs and methods in conjunction with the existing Demaral design. I am not in the habit of ripping off someone elses idea to make my one work "We all need to feed ourselves and pay the bills".
How ever I did manage to get around the "click tamper" by designing one in which you can adjust the pressure from 25 to 35lb, what Im having problems in deciding is to have continuous adjustment or steped adjustment.
Just to keep you all thinking! Im designing a tamper press similar to that of "Mazzer" and "Macap" but with a twist!
The other designs I have in mind for comp baristas is a waste bin similar to that used by David Makin in comps but professionaly designed and built, with a few surprises. And a group handle "fork & mat" combo never seen before. All of this takes time and I am trying to do all of this while starting my new career in building, installing & servecing Desalination plants.
Im sure if you all keep your eye on this site, you along with a selected few will be the first to see my new designs.
Kind Regards
Angelo
Demaral Industries.
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Re: Dema.RAL tamper discussion
Hey that sounds great but could be a bit complex to design without infringing the Espro patent :
I think it would be cheaper to use the Dema.RAL in conjunction with a Click-Mat.
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Re: Dema.RAL tamper discussion
Hi Angelo
Have you looked into what the extra cost would be added if the tamper was given a pressure click operation like an Espro sitting above the current setup?
Then it would both guide and also allow for constant pressure operation as an option if you set the depth to maximum (the click operation would be meaningless if you set the depth too short for the dose to pack down hard enough, of course, so the tamper would operate as current in this mode).
Greg
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Re: Dema.RAL tamper discussion
In reply to Rustys web site observation. The tampers shown are the old style "actualy" the first ones made. The spring in these were firmer "Good for car suspenions but not for tampers". The spring on the new ones are much lighter with an increased sensitivity to pressure, We have also introduced new colours, Vibrant Green, Lime, Deep Rich Purple, The red is more Blood Red without the orange tinge to it, the blue is Darker and by special order you can have one Nickel plated.
By special order only I can make them with larger diameter flat top handles for people with "Grip" problems, this will allow you to place your palm on top and just press and "twist to burnish"
To order Just Visit www.Demaral.com or call direct 0412 079 130
The new web site will be up soon!!
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Re: Dema.RAL tamper discussion
Took delivery of my Dema.RAL yesterday and here’s the report on its performance so far.
First impressions:
1. Looks superb.
2. Feels like it was made for my hand.
3. Tamps magnificently.
With the Dema.RAL the tamp is dependent on the dose so that has forced me to pay close attention to dosing. Once I got the dose right the tamp was spot on each time every time.
One of the difficulties I had with other tampers was uneven tamping – not the fault of the tampers but a fault of the operator. The design of the Dema.RAL makes it impossible to tamp unevenly no matter how hard I try.
Adjusting the depth of the tamp is easy, and once locked in it doesn’t vary.
So what do I think?
Why spend extra money for tamper stands or pressure sensing mats or why clutter your work area with bathroom scales when in my opinion this tamper does away with the need for all of these extras :
Thank you Angelo for designing such a brilliant tool
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Re: Dema.RAL tamper discussion
One interesting observation so far:
The Dema.RAL website shows a slimmer handle to the one supplied. I think some were turned off by the slim handle :P
The fatter one is very similar to the Pullman so I find it quite comfortable
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Re: Dema.RAL tamper discussion
A great buy Carlie
Ive only had time to pull two shots so far and I am very impresed.
More to follow.
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