DavecUK thanks Dave. I get that logic, but strange that’s only happening now. The above settings had been in place for months now. I’ve used many types of profiles and lots of different bean types, the only time I observed funny operation was when it would either over shoot (not by much more than a bar or so) or not reach target pressure in a step. That would be rectified by changing the speed or kp value, but as I say the above settings had been in place with no issue for a good while, but shooting up above 15 bar half way through a 2 bar step just seems odd! Everything seems fine now anyway, thanks for you and other’s input (It’s a great machine😊!)
Vesuvius Pressure Profiling Machine - General Discussion
As previously said this happened on my machine as well twice or three times . Same as yours around year old.
Very odd and doesn’t seem right at all. The group pressure gauge didn’t register any increase in pressure and was showing 0 yet the pump was going at 15 bar .
I’m glad it didn’t happen for a while now.
mailto:kafar@btinternet.com
In the recent weeks I noticed the pressure on the group gauge running around 1 bar higher than shown on display. I would normally ignore it but they were always showing perfectly same pressure since day one and remember reading @DavecUK post about this.
What could be the issue ?
Video a bit short as first shot of new beans so need to grind tad finer but basically when the display shows 8 bar the group is 9 as it falls to 7 the group will show 8 etc.
mailto:kafar@btinternet.com
- Edited
prezes As the pressure is equal in all parts of a system that is sealed, which the brew circuit is at the inlet end….the pressure differences can only be due to either the:
- Software PID fluctuations that the system reads but the gauge doesn’t react to
- Software PID fluctuations that the system doesn’t respond to, but the gauge does read
- gauge reading incorrectly
- pressure transducer reading incorrectly
As the gauge is a mechanical device, using a coiled bourdon tube, it’s never likely to be that accurate, or consistent across the range of readings e.g. it might be accurate at 5 bar, over/under read at 2 bar and 10 bar? They can also become less accurate over time.
What happens if you try it on a blind filter with the machine set to a constant 9 bar…
DavecUK thanks @DavecUK as said only picked up on it as it always read perfectly same so noticed the difference. Don’t want to be overly worried without reason but rather nip issues in early stages.
mailto:kafar@btinternet.com
prezes I don’t think there’s anything to be worried about, the gauge perhaps overreading by 0.3 or 0.4 bar.
- Edited
prezes Since I have bought my V (three years ago) there has always been a difference between 0.5-07 bar but as @“DavecUK” mentioned we have two different systems of detecting the pressure so I decided this should not be out of the norm. The most important thing is, is your coffee what you expect/like it to be? 😀
Current setup: ACS Vesuvius, Nuova Simonelli Mythos One. Past experience, Nuova Simonelli Apia 1 gr., San Remo Capri 1 gr., Bezzera BZ 35e, Fracino Heavenly. Anfim Super Lusso.
Contact me at: john_yossarian11@yahoo.com
John_Yossarian absolutely, coffee is great and that’s the main thing !
Only asked as mine always perfectly matched and only recently started noticing the difference.
mailto:kafar@btinternet.com
6 days later
I think I got to the bottom of this. This morning noticed the group gauge is sitting at around 0.5 bar when not brewing. I was sure I had a photo from last year to check if it was always like this and it wasn’t so definitely issue with gauge. Anything I can do about it or is it replacement only ?
mailto:kafar@btinternet.com
- Edited
prezes As I thought it’s the gauge..you can “try” twisting the outer shell a tad, but I think it’s keyed with a square piece, so it won’t adjust it….replacement is the only option I am afraid.
Note to self: “the OCD is strong in this one” 😁
Do you need that gauge there?
Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -
I don’t at all but as it’s there it is bothering me ever so slightly being out !
I know what the issue is which is the main thing so might get rid or learn to live with it. I don’t think I’ll be replacing it
mailto:kafar@btinternet.com
Was that stock? I thought they had a grub screw in there?
Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -
Was that stock? I thought they had a grub screw in there?
Decent De1pro v1.45 - Niche Duo - Niche Zero - Decent is the best machine ever made -
prezes - time for the grub screw to go back in then…
Problem with redundancy of instruments (which one do you trust, and are they calibrated) or essentially “useless” ones. For instance, yes, you have the pressure measured on the group… but you don’t need it, nor can you influence it. If you had a flow control valve (like the Bianca) then I understand the need of the pressure gauge.
6 days later
- Hi Dave,
My machines been rock solid for the past 5-6 years however it has just started buzzing when I pull the lever down… coffee still comes out but definitely doesn’t sound right..
Any idea what it is and where to get replacement part if needed.
Can’t seem to attach a video can I email it to you for your review?
Cheers Doug
Regards