[Jim bean]

Hi majnu nice find I might contact the seller see if he is making anymore

cheers James

 

[MrShades]

Hold fire Jim... I'm working on sourcing the parts for the Pt100 sensors / brass M4 fittings etc. I've bought an Auber one, and it's pretty basic...

I think I'll be able to do them at a reasonable price, but sourcing/assembling everything isn't cheap! Give me a week or two and I'll let you know more.

 

[majnu]

Mrshades there is an ebay one in that link but I think it requires cutting at the thread to fit. If you saw my reply in your thread the DIY ones need welding.

 

[MrShades]

Mrshades there is an ebay one in that link but I think it requires cutting at the thread to fit. If you saw my reply in your thread the DIY ones need welding.

I have a cunning plan... I'll let you know once further work is complete!

 

[frustin]

i'm also interested.

 

[domjon1]

fascinating thread thanks for your efforts, gonna have a go a this at some point I think

 

[Norvin]

I mounted a standard chinese thermocouple by soldering it to the body of a standard thermostat.

First you have to remove the plastic from the body, it helps to have a lathe to do this but you can probably use a dremel or perhaps burn it off.

Once you have the bare brass housing, tin it with solder - I had to use plenty of flux and a large soldering iron to get it to take.

Then simply hold the solder bulb on the end of the thermocouple into the molten solder, hold a while then allow to cool. I didn't bother to remove the threaded sleeve first.

It then simply screws into the boiler.

 

[frustin]

i suppose it's too late for you to show a pic of it in place?

 

[Norvin]

i suppose it's too late for you to show a pic of it in place?

No problem.

 

[majnu]

Does anyone who has a mypin know how to set the alarm function for steam? The rex is well documented and feature rich when it comes to this, but the pamphelet for the mypin isn't as comprehensive.

 

[Jim bean]

Here you go majnu

 

[majnu]

Here you go majnu

Saw that video before unfortunately he doesn't go into detail. Thanks anyway.

 

[Jim bean]

Hi majnu looking at the video I think you would need to set

AL1 to 1.0 (I think this should be AH1 alarm high)

and then the An1 (which sounds like AL1 alarm 1)to your set temp eg 146

cheers James

 

[majnu]

Al1 which is the alarm value I can set to anything but the An1 only accepts 1-7 iirc as that is for the alarm modes. There is no hidden menu on the mypin as iirc you set that to something to allow your steam ready light to kick in at 146 degrees c and then turn off at your set hysteresis value to allow 2 degree variation.

I don't think the mypin is as good as the rex tbh. Damn those colourful buttons lol

Still I get plenty steam power but the variation for me is as much as 10 degrees.

With the brew side of things are you having to turn on steam for a few seconds to compensate for the intra shop drop? I find that even with a pt100 it doesn't react fast enough to stabilize the brew temperature as we're done brewing within 30 seconds max.

The intrashot stability video on the web must have some kind of preinfusion mod that prevents this.

 

[Jim bean]

Hi majnu have you got the Alarm working?

the steam alarm won't hold the temp like the SV does it just stops it from going past a set point so when the alarm comes on it will go over a 1/2c then cycle down around 4/5c then starts to rise again

the intrashot stability only drops 1c for a few seconds then goes back to the SV I'm not using the steam blip just using the brew switch as normal

cheers James

 

[majnu]

Hi majnu have you got the Alarm working?

the steam alarm won't hold the temp like the SV does it just stops it from going past a set point so when the alarm comes on it will go over a 1/2c then cycle down around 4/5c then starts to rise again

the intrashot stability only drops 1c for a few seconds then goes back to the SV I'm not using the steam blip just using the brew switch as normal

cheers James

Ah right. I thought it would hold the Steam temp like with the brew side (which is very accurate within 0.5 a degree). Currently it does what you explained but I was trying to replicate the brew side by having a high and low alarm value instead. Maybe that is an Auber feature? I just need to get or make something that will measure water temp at the brew head so I can either adjust or leave my SV as is.

So your PID doesn't measure too much of a drop when pulling a shot, interesting. Will test mine again tonight without blipping the Steam.

 

[Jim bean]

Hi majnu the auber PID steam function works in the same way

My offset was around 10c so my alarm comes on @156c on the PID when I had it set to 146c the steam was poor when it would cycle down past 140c I think the best thing about the steam alarm is being able to do bigger jugs of milk although steam power has improved aswell now I've bumped the steam temp up to 156c

Cheers james

 

[majnu]

I was in a rush today so the boiler didn't have a chance to stabilize properly. Probably only was turned on for 5 mins but the PID did show a temp drop of 4 degrees when pulling a shot without using the steam blip.

I need to look into getting a thermofilter made as the water coming out from the group head is what is important. Have you made yours James?

Additionally my brass group block arrived from espresso services. It weighs 3 times as much as the aluminium one it replaced.

 

[Jim bean]

Hi majnu Ive used this method for now till I pick up a adjustable flow regulator

http://coffeeforums.co.uk/showthread.php?19777-Homemade-Temperature-Gauge-(Scase-Style)&highlight=Temperature

 

[Jim bean]

I've tested the intrashot stability again over 25 seconds it says on 104c for around 10 seconds then 103 for a few seconds 102 for a second then back to 104 for the last 4/5 seconds that's not to bad but will try the steam blip

be careful if using the DIY method above second time I've gone to use it the pressure just fired it out with a load of coffee everywhere probably stick a bit of JB weld round where the thermocouple enters the basket

or thinking on use quite a course grind