Vesuvius Pressure Profiling Machine - General Discussion

Stick is in the classifieds section

Cuprajake thanks, new to this forum. I’ll do that.

Kape17 hello, I myself has a Vesuvius circa 2014 October. I am in the US, I ordered the magnet here in Fluid O Tech USA for $36.00 plus shipping. I am keeping it as a spare part just in case.

A sound move, mine is from the same date. I doubt you will ever have a problem, as it would have showed itself by now, in fact you would have seen the beginning of the effects years ago, with the machine not quite making full pressure, or not over 8/9 bar.

Having the spare magnet ensures one thing…that your magnet will never go wrong. It’s a law of the universe…“called sods law”. Also why toast always drops buttered side down.

I replaced mine in the first year. You know because the motor will sound different than you will have gotten used to hearing. It’ll spin higher and pressure will not correspond. From what I’ve read it was a bad batch not design so once the internal bit is replaced you are good. That was 2018 for me. No issues since.

Hi. I have the same setup. There is a disconnect somewhere because when I run without coffee the pump pressure achieves close to target and the group remains at zero.

My guess is that there is a check valve and an over pressure valve and with the PID interaction the pump can depressurize after overshooting and the higher pressure will remain downstream of the overpressure valve and register at the group. That side of the system is never meant to be closed.

I can test on my system.

Kape17 Greetings from SoCal USA! I just want to get some solution if it is a problem or an issue with my Vesuvius machine. I just installed a manometer on my group head today. My profile (gear pump) is set to 9bar but when I tested it with a blind basket the group head manometer is reading at 10.5 bar.

There is absolutely no problem with the machine. I’ll explain briefly in bullet point steps of what’s happening. You clearly have a blind filter installed, so the system can’t work properly. I think I explained it in the manual somewhere, and probably in a video about the Vesuvius on my YouTube channel.

• System has 1 way valve after pump
• blind filter prevents the slightest bit of excess pressure leaving, not even a single drop, which wouldn’t happen with coffee.
• Pump runs up to pressure PID sees target approaching stops pump as quick as it can, but slight overshoot…you can change pump PID settings and pump acceleration to minimise that. Not possible to entirely eliminate some slight overshoot for a brief moment
• Pressure is now locked in, cant go forwards, can’t go back, can’t go down…
• sealed brew circuit heats water, which expands, so maintains or even increases pressure

In a sealed circuit added even 1 drop increases pressure hugely as water cannot be compressed. With coffee this wouldn’t happen, or with a scace 2 that has a valve, this doesn’t happen as water can escape at the same speed as through espresso.

Moral of the story, don’t check the machine with a blind filter, you prevent it working as it should. Hope that helps.

DavecUK thank you! I will make another video using a coffee puck instead of a blind filter.

I’ve had an issue twice today with my Vesuvius, purchased a year ago. The pump shot up to 15.5 bar after about 6 seconds.the particular profile is 10 seconds at 2 bar then 9 bar. On both occasions I noticed the pump ‘kicked off’ and shot up to above 15 bar at about 6 seconds and then settled back down around 8 bar after about 12 seconds or something. The shot them took about 50 seconds to finish. I turned the machine off both times and made a couple shots after the first time that were fine but then it happened again when I made my last shot. I checked inside and there’s nothing kinked/leaking etc. anything I should/could check for tomorrow anyone?? Many thanks in advance

This is going to sound obvious but it happened to me. I’d have a very unfamiliar sequence of pressures and wondered what had changed. I had changed profiles without noticing I had done so. Just rule out the simple stuff like that user error before going too deep.

jonathanUSA na,I just checked,it’s actually 8 sec 2 bar, 18 sec 9 bar, it has been on the same profile for days. And, it happened earlier, then was ok fir a couple of shots then went crazy again for the last shot of the day

hmmm, will commit to giving thought to this. I’ll jump back on if I have any euphonies.

JahLaza shot up to above 15 bar at about 6 seconds and then settled back down around 8 bar after about 12 seconds or something. The shot them took about 50 seconds to finish. I turned the machine off both times and made a couple

Could be it’s ground to fine and Cruzet many years ago made a change to the drive unit (Cruzet a french company make the mag drive impule unit, FOT Italy make the rest). The drive unit requires less impulses for a given speed. My pump acceleration figures are for the very old drive unit. Use much lower values and it should be better. your acc is probably so fast the PID can’t react in time to prevent the overpressure.

Why don’t you put your pump PID settings and Pump Acc numbers up here, then you can be helped better.

DavecUK pump kp 10.0. Ki 0.24. KD 90. Pump acc 410. Everything else as per factory settings. I did change bean yesterday - on to a blend of Ethiopian/Sumatra with a wide range of bean size within actually. Maybe it’s this bean blend/grind as you point towards. I’ve been through a lot of different beans with the Vesuvius and never experienced this. So maybe I should reduce pump acc speed?