Hm…. I don’t remember noticing this with my machine. Are you sure you key’d in all the PID settings correctly?
Could you please do a video just to make sure we are talking about the right thing?
After a shot, and 20s so the shot time disappears from the display, I see the temperature goes down by 3 or 4 degrees, and quickly recover.
How long are you flushing for? I usually flush for 1 or 2 seconds and wipe it clean.
Hi,
Yes I can make a video. I use the flush feature by pressing buttons 1&2 together, which is set to 6s flush, I believe, copied from Dave’s settings. The temp display setting also copied from him, shows the actual temp and not the set temp. I’m pretty sure I copied all settings from his review correctly but definitely can double check.
erkal - OK. I never flushed my machine for 6 seconds before :-) - I never saw the need for it. In any case, I’ll do the same tomorrow and will let you know 👍
That’s a good point actually :) A couple of seconds of flushing should be enough to wash away the coffee
I will try it that way as well.
erkal - Flush for a 3 seconds and clean the group when you are done with a wet cloth. Then flush it again for 1 second or so (if you really want to).
If you don’t want to flush much, consider investing in a puck screen or use aeropress filters on top of the puck.
Even if i flush for 6 seconds, temperature drops about 6 degrees maximum, and recovers back to 93 fully in about 30 seconds.
Inspector - I think you are right. I remember the recovery setting are quite aggressive with the factory PID setting, overshooting quite a bit. But not with those suggested by Dave.
Well that’s not good for me, I am now noticing temp drop and then spike to 101 even after I just pull a shot. I made the video but I don’t know how to show it on here
I’m going to go through the settings one more time
erkal - put a video on YouTube, unlisted, and paste the link here.
bit of an unrelated question but do you find your steam wand getting hot after steaming some milk? today it was almost untouchable from top to tip and I am not sure if that was always the case or is it meant to be cool to touch all the time?
erkal - 😊
They will get hot after steaming - but you can touch them.
If you ever touched a non-insulated steam wand, I expect you to have scars of 3rd degree burn in your fingers.
The only reason they would heat up is if steam is getting between the inner tube and the wall of the steam wand.
Do a test:
If you can’t, you most likely has a leak on the top of the steam arm.
Did you manage to contact Bella Barista?
erkal do you find your steam wand getting hot after steaming some milk
Usual steaming lasting approx. 40 seconds. Then I just open the steam wand and let it run steam. I was able to hold the steam wand comfortably at all times. It was warm, but it was not hot. The closer you get to the tip or the top the warmer it gets due to condition from the non-insulated parts.
erkal I am now noticing temp drop and then spike to 101
Checked this to after a 6s flush: as expected, temperature went from 93C (set temp) to 87C, then quickly recovering - about 1 minute - back to 93C.
Make sure your PID parameters are what’s recommended by @DavecUK .
Thanks for the test!
So maybe I am being a little dramatic but I am pretty sure there was nearly no heat on the wand after frothing. I just made two drinks back to back and yes the tip is scorching which is normal but the middle elbow bit is also warm and as you get closer to the top nut it gets very very hot again.
Yeah I have now noticed that it’s not even due to the flush anymore, it shoots up to 101C right after pulling a shot. I am going to go through the settings again and compare them with Dave’s.
KPc = 0.2 (PID Proportional value coffee boiler)
KIc = 0.07 (PID Integral value coffee boiler)
These settings on mine are much different to Dave’s. I found another value which was very different (Bs) and set it to Dave’s. It seems to get even hotter now
erkal -
Can you please list ALL the values here, of all parameters, please? The derivative and band/range values are also important. (e.g.: KDc and Bc), as well as the offset value (EC). And same again for the Steam values, so KPs, KIs, KDs, Bs, Es)
Many thanks.
Sure, here we go:
KPc 2.0, Klc 0.04, KDc 1.0, Bc 30, KPs 2.0, Kls 0.00, KDs 0.0, Bs 1, Ec 10, Es 0, F01 1, TR 1, ToT., EVS 1, BLS1 3, BLS2 3, BLP1 2, BLP2 5, PRG 3
What do you think?
erkal - Well…
erkal I believe, copied from Dave’s settings.
I think you haven’t copied the settings as suggested by @DavecUK :-)
See below, key in the correct values and we go from there :-) (e.g.: KPc should be 0.2, KIc should be 0.07)
https://sway.office.com/S5J4d9Jp4Y9LdVFx
Let me know if that fixes the issue :-)
Right! This is pretty perfect now, thank you so much for your help!
I don’t know why I didn’t think I could change the initial values, totally my stupidity, I have adhd and reading instructions doesn’t always lead me to the intended result :)
I pulled a shot and it dropped to about 88 and slowly creeped back up (about 30-40s) and its lingering around 93-94 now. Never went above the set value of 94. I guess this is what we wanted?
Now I just need to upgrade my grinder, get a bottomless portafilter and I will be rocking, get out the way James Hoffman!
