my friend sent this link to me, i did the same thing in the synesso, any coffee lover wanna try, i am in hong kong.



any pressure profile for me to test,
i tried many profile these day, but this one, 6 sec 2 bar, 2 sec 4 bar, 6 sec 2 bar, 2 sec 5 bar, 6 sec 2 bar, and 9 bar finally, ramp down by manual.

if you are living in hong kong, you can come to here and lets share the pressure profile.

Okay I'm going in!

Before I do anything stupid I better ask if anyone have anything to add to all that have been written so far?

The application will be my GS3 with external motor/pump and Water Reservoir (not plumed).

First I'll have to choose a motor/pump and find a source for it.
I'm most keen on the well documented TMFR 51 but Bill keeps talking about gear pumps and I didn't quite get the advantages? I would have to convert to 24V DC and don't know how to control it but the FG100 very looks nice! Did I overlook any obvious choices?

I'll probably have the same problem regarding buying a Fluidotech device as Tom did, so I would love to know were to buy in the US? - Just to ship it back to Europe

Any suggestions on an electric pressure sensor?

Did I overlook any obvious choices?

Yes - patience - not only is it a virtue, it would be a wise choice at the moment. Who knows? - there may be retrofit kits offered by a LM distributor - depending upon the strength of the Strada reception.

For YOUR PARTICULAR installation, it would be a nice option to install a "delay-on-make" relay between the machine's wiring and the pump motor such that brew initiation opens the solenoid valve and preinfuses the coffee with ~ 3.0 bar pressure and then starts the pump after "x" seconds. This is obviously NOT pressure profiling but it would improve your installation, IMO, of course.

The application will be my GS3 with external motor/pump and Water Reservoir (not plumed).

You need to elaborate a little. Did you remove the pump/motor and simply outboard it or do you have a flojet arrangement with a large reservoir?

Thanks eric

I'm running from a passive water reservoir. And I have never bother about the delay based per-infusion as I only have a very modest pressure to work with. La Marzocco should IMHO have provided the delay method as an alternative to the pump pulse method (would only have required a little extra code).

I'm not sure about waiting for La Marzocco to come up with a retrofittable profiling kit, what's the likelihood of that happening any time soon?

I simply can't find a place to order the pump/motor unit and Fluid-O-Tech don't answers my mail. Any suggestions?

Who are you contacting at Fluid-o-Tech? I've never had trouble getting in contact with them.

Also, I'd bet you might be waiting a long, long time on a retrofit kit from LM. If I were doing it again today, I would figure out a gear pump. They are supposed to be virtually silent. The TMFR pump certainly is not.

Also, I'd bet you might be waiting a long, long time on a retrofit kit from LM.

I agree - that's why I said LM distributor vice LM-USA. And I'm thinking someone like Terry Z. & the crew at Espresso Parts.

This is the Fluid-O-Tec pump I am interested in - http://www.fluidotech.it/Pages/en_fg100_series.aspx . From the literature I have (which I am happy to share), it simply requires a 24V DC power supply and a 0-5 volt control signal. Unfortunately, it is NOT available in USA as I type and neither I nor FOT-USA has received any reasonably firm pricing info - F-O-T must be readying themselves for Host Milan

Thanks to both of you

I'll look into the FG100

Pricing info received from F-O-T USA - $300 - delivery in 4-5 weeks. I have one on order but could easily change that to 2 or 3 .

Nice

In the meantime I have received the following advice from Fluidotech.it (after referring to this thread):

The correct Fluid-o-Tech product to meet the given requirement is our MGFR system in PPS, with 4 mm gears in PEEK, pressure relief valve, NBR o-rings, 24BLDC motor with speed control (0-5 analogical input command provision).

The a.m. product code is FG304RD1PN10000

Tomorrow I'll check out the pricing on this and place an order (or contact Eric).

Sweet! I am looking forward to hearing how it goes. I may build myself another system and put my current one into service elsewhere... It would be nice to have a fully silent machine, and perhaps with a smaller, simpler control setup as well. Eric, I was curious about the steam boiler fill function of such a pump. Will it have a good enough flow for such an application, or should something else be done for the auto-fill?