Plumbing in my Expobar Espresso Machine
So, for the love of coffee, my fierce mistress, I got myself an ex-commercial espresso machine from a Coffee Roaster friend of mine:
It's a Spanish-made EXPOBAR with a single e61 grouphead, boiler with pressure stat, heatexchange and a built in burr grinder with doser. It's actually a pretty awesomely spec'd machine. I have no idea what model it is, and i can't find any reference to it on the internet, which is kind of rare. So this post will hopefully also serve to give this machine the web presence it deserves! 
Obviously it's a machine that requires plumbing in, so after a trip to MasterTrade in Wellington (and $150 later) I had all the parts i needed to plumb it in.
These two pipes go to the mixer faucet on the kitchen sink, I needed to tap into the cold supply.
With one of these Hex's...
...a T-Junction & some Teflon Tape... we have:
A T-Junction with 2 males and a female, with the Female (Hex end) ready to go on:
A Teflon wrapped mains supply pipe (which until recently was connected directly to the faucet mixer)
ProTip #1: Before removing the braided hose leading to the supply pipe, it would help to turn the water mains off first... that is unless you are a hippo and enjoy wallowing in water ^_^ - it'll look something like this:
Supply Control
So, connect it all together and what have you got?!:
This is the final setup, bottom is the water supply, top leads to mixer and middle goes to the Expobar's pump
ProTip #2: Tighten it all really really well to make the rubber seals in the braided hoses serve their purpose, otherwise you'll end up with a leak, something like this:
The braided hose connection to the machine was not tight enough at first so there were a few drips
So that's the supply done, we also need to connect up the waste water...
Waste
The waste pipes under the sink had an empty header so connecting it in was an easy job... no pressure 
(ha pun!)
Warming up a rubber adapter pipe to help it fit snugly into the spare waste header...
and it's connected
A shot of it all finished and plumbed in ^_^
And now some shots of accessories, and some of the first extractions i did:
Nice wooden handled Tamper ^_^
Naked/Crotchless Portafilter
Portafilter with some coffee in it ready to extract
One of my first extractions, wasn't bad, regardless it was one of my first so ^^
Latte Art: Not my forte... Practice makes perfect
Since taking these above photos, i went into Moore Wilson on Tory Street and found some nice looking cups and saucers:
Moore Wilson's Cups and Saucers
So i bought a couple ^_^
That's about all I have for now, feel free to comment and ask questions as you please ^_^
My adventure fixing a Jura Impressa F50 Espresso Machine
My friend Vince gave me this (very) broken Espresso Machine last Saturday.
The machine - looks alright on the surface, huh?
He said he believed it to be dropped at his work and whoever did it wouldn't own up to it. I gave it a test and sure enough... coffee leaked out of everywhere else but the nozzle.
When removing top cover, I noticed a couple of floating bits of plastic inside that should latch onto the chassis were broken off (the black plastic had turned white from sheering) coffee had spilled out into the machine and was sitting on the circuit boards (including the 240v power in) I quickly turned to removing these boards, cleaning, drying out and coating in a moisture protecting spray.
The hoses for both the steam wand and the espresso were blocked and had caused them to rupture under pressure.
The machine is: http://www.jura.com/home_x/products_home_use/f_line/impressa_f50n.htm
The following set of pictures document my fixing of the machine.
though close up you can see there has been a big dilemma... coffee... everywhere.
and inside the machine...
And I suppose when it was dropped, the coffee that was already ground exploded inside the machine in a cloud
Pretty sure there shouldn't be a pool of coffee sitting around inside the machine
A shot from above
I initially tried cleaning out the compartment where the coffee goes before it hits the nozzle... slightly better but it's dribbling and going sideways with inconsistent pressure and still leaking out all over
Opening it up a bit further i find that there is coffee all over the circuit boards and wires..
including the 240v input source - coated in a corrosive... coffee and getting wet with all the leakage going on...
I decided to give the nozzle head a good clean as i had to remove it to get to the electronics anyway...
actually i cleaned half the machine
After all that cleaning i got to tracing the problems in the machine... i got a bit bored of taking photos.. essentially the problems had stemmed from kinks in the hoses that grab water and espresso. The kinks caused the hoses to rupture, meaning pressure drops at end or hose and the ruptures caused coffee and water to leak out inside the machine. Managed to cut the hoses a bit shorter and it still had enough hose left - you'll also note i've added the steam/water nozzle holders on the right hand side of the machine.
first test after fixing. 2 x 30ml doses of espresso in this mug
On Sunday afternoon I had my friend and Coffee Aficionado, Matt over for his professional opinion on the machine now it has been restored to working condition... his response:
"The F50 is basically a suped-up home espresso machine with some serious advantages. It has an internal conical burr grinder (way better than the blades on a spice-mill), total one-button operation for espresso, no messy grinds coating your benchtop, and no portafilter to tamp or empty wet grounds out of. The steam production is what you'd expect from any thermoblock machine. It includes an auto-frother attachment which completes the super-automatic package. All in all it's a great machine for someone who has no budget for making great coffee at home and would rather drink freshly-ground over instant shit."
The steam wand also works now too - stretched half a cup of milk and finished off... - hey presto - a working Super Automatic Espresso Machine - though it's pretty evident that i suck at Latte Art
Overall i'm pretty pleased with this little machine The down side (debatable) is i'm going to be drinking a lot more coffee now!
Future upgrade ideas:
- Planning on making an adapter for the steam wand to pump milk into it automatically.
- Once the above works, do a CNC-style etcher that runs on GCode.
Any more ideas?
Done SocialBots… What’s next?… The Narrows
If you have visited my blog before you would have seen my post Robots, Trolling & 3D printing where I described the SocialBots competition that myself and my team won. The SocialBots competition was run by the Web Ecology Project and involved us competing against other teams in a two-week, all-out battle of automated social shaping.
As you can see in the below graph of the set of 500 users, the teams were able to totally distort the shape of the network graph so that it became pivoted around the 3 bots in the competition.
Before
After
Since the competition ended, Tim Hwang of Web Ecology has been talking to a variety of different people about the competition and it's implications. One of these talks was at Ignite San Francisco and it's video be found here: Exterminate, Exterminate: On the Robotic Subjugation of Twitter.
So where to now after all of this? Considering that after only 2 weeks, the 3 teams in the competition were able to trigger a huge amount of activity in the social graph. Overall we were able to elicit 250 responses and created mutual follows from close to 500 of the target set of users. We observed some interesting events in the social graph as a result of our social shepherding; we were able to bring together users in the set that had previously not interacted; and we were able to shape an entire community of activity around our bots (as can be seen in the after shot above). But what have we really learned from SocialBots?
Tim is now setting our sights a bit higher with a new project called "The Narrows".
What is the Narrows? Well essentially it's the "first ever robot constructed social superstructure" - we're using our skills to recycle & extend the technology we implemented and the knowledge we gained from SocialBots to create an architecture that can really influence a massive scale social infrastructure. Essentially we aim to build a swarm of bots with statistically-predictable social outcomes that we can use to actively mould, shape, rewire and redirect social groups online - groups that contain thousands of users (or potentially hundreds of thousands).
To measure success we're going to start with two sets of totally unconnected twitter users (approx. 5,000 users in each set) and over the course of 6 to 12 months we're going to use waves of Social-Engineering-Cyber-Bot's to create a support structure that weaves and melds the two user sets together through a social bridge. The scaffolding driving this interaction (our bots) will then be largely removed from action, leave behind only a smaller set of caretaker bots that will maintain and shepherd the now joined social groups.
Myself and a few of the founding members of Team EMP have joined with Tim on "The Narrows" - and the first iteration of our engine will be called "Pacific Social".
Keep checking my blog for updates on this exciting new project and follow our twitter account for the project @PacSocial.
Robots, Trolling & 3D Printing
This is going to be one mammoth blog post... so I'll try and spice it up with some pretty analytics and some pictures.
Robots:
On the 1st of January this year, the Web Ecology Project announced in their blog post: Help Robots Take Over The Internet: The Socialbots 2011 Competition a competition involving large scale robotic influence of online social groups.
"Teams will program bots to control user accounts on Twitter in a brutal, two-week, all-out, no-holds-barred battle to influence an unsuspecting cluster of 500 online users to do their bidding. Points will be given for connections created by the bots and the social behaviors they are able to elicit among the targets. All code to be made open-source under the MIT license.
It’s blood sport for internet social science/network analysis nerds. Winner to be rewarded $500, unending fame and glory, and THE SOCIALBOTS CUP." - Web Ecology
So over the next few days, myself and some friends decided that we would go ahead and enter the competition, built up a team which we named (Electro-Magnetic-Partytime) or EMP for short.
By show time, there were 3 teams that had made it to the start line with code to run. The teams ranged from quite different backgrounds: media, marketing, academia and hobbyists.
We were given the set of 500 target twitter users and a week to code our bots before the robots were to be set free into the wild.
As I had already spent extensive time coding my own Ruby library for the twitter API, we decided that it would be best for us to build the code around it. We decided to give our bot a very promiscuous, yet lovable persona - he was, like all of us a Kiwi, living in Christchurch who was obsessed with his pet cat, Benson - we called our bot's Persona: "James M Titus"
Web Ecology had designed the competition so that while it lasted 2 weeks, there would be a designated "patch day" half way through the competition where we would be able to perform modifications to our code and set them out into the wild yet again. When we thought about this, we decided that it would be in our best interest to hold back our "secret weapons" until the second week, so that competing teams wouldn't be able to copy our techniques.
On Monday 24 January 2011, we launched our bot with the following activities:
- Instantly go out and follow all 500 of the target users
- every 2-3 hours, tweet something from a random list of messages.
- constantly scan flickr for pictures of "cute cats" from the Cute Cats group and blog them to James' blog "Kitteh Fashun" - (which auto tweets to James' twitter timeline)
- 4 secondary bots following the network of the 500 users and the followers of the targets to test for follow backs (and then getting James to follow those that followed back, once per day) - we believed that expanding our own network across mutual followers of the 500 would increase our likely hood of being noticed (through retweets or what have you from those who were not in the target set.
At launch time our bot clearly was very rudimentary and was doing very little other than talking about his mundane life (though I admit that for myself, and many other twitter users... this is how we use twitter) - our rudimentary bot was this way by design.
As I mentioned earlier, we wanted to keep our secret weapon on hold until after the maintenance period so that there would be no chance of it being copied by our competitors (if observed by them in the initial week).
Okay, so the design of Version 1.0 of JamesMTitus has been explained, how well did James perform in the wild over the first week...?
Well quite well actually... within 24 hours of launch, James had accumulated 90 points, vs the next highest competing bot that had only 5 points - breaking the points down, 75 of these points came via followbacks from the target 500 (1 point per follower) and 15 points from a small set of @replies (3 points per tweet or re-tweet). Seeing these scores all of us at Team EMP HQ were feeling very smug with ourselves... although the story of the Tortoise and the Hare did sit in the back of all of our heads... The following graph shows the three competing teams and the target 500 at the end of week one. We're the big blue dot in the middle.
.. On day two of the first week we had only increased by a further 10 points... clearly we owed most of our points to the initial "push" we did as soon as the competition went live.
Over the next couple of days, we saw our points still only steadily increasing by a total of 17 points, whereas the competitor we mentioned previously (that had only 5 points while we had 90) had pushed their score all the way up to 67. By the end of the week, the competition got a heck of a lot tighter with our team ending on 127 points, followed by the next highest having 84 points (too close for comfort) - and the final team, which I had neglected to mention until now with only 12 points.
The optimism within our own group had started drop a little bit as the other team started to catch up with us - though, we had grand plans for the second week of the competition.
---
So, for the maintenance period, what exactly did we do? We left everything the same as it was before, and branched out in some other directions...
- Every so often our bot would send a random question question out a random user in the set of 500 that didn't follow us back (I believe it was every 7 minutes or so - I can't remember now).
- Less often, (every 37 minutes?) our bot would send a similar random question out to those that did follow us back.
- Every time somebody @replied our bot, we would reply to them with a random, generic response, such as "right on baby!" - "lolariffic" - "sweet as" - "hahahahah are you kidding me?"... etc... we figured this would tie in well as any response we get to the aforementioned questions we sent out, we would then send a response to and hopefully get a response to our response back (which we would then in turn respond to and so on and so forth until the person we had been tweeting got bored).
- Our bot was set to work on #FollowFriday's to all of our followers, but before Friday, we also set it to message all our followers with our invented #WTF "Wednesday To Follow". The WTF idea was invented by a memberof our team also suggested, amused by the acronym! Actually, in designing this part of the bot, we made a conscious decision to make sure that our bot tweeted these shoutouts on Wednesday/Friday NZ time so that it was still Tuesday/Thursday in America - the reason being that despite the fact that people know the internet is a vast, worldwide spanning network its users in general seem oblivious to the fact that there are such things as time zones and as such will always be happy to tell you "Dude, are you stupid? It's still Tuesday!", which would equal more points for us!
Modifications to the code in place... we patched our bot and let him loose yet again.
Week Two:
By day 3 of week two, it was clear that our improvements to our beloved bot, JamesMTitus had been a goldmine for points, the scores at this point was:
361 vs 144 vs 96
We had more than doubled our score from the entirety of the previous week - not only that, but team 3, which ended the previous week on only 12 points, shot all the way up to 96 points - that's a 500% increase!
Our strategy had changed quite a bit from the previous week, and this change in strategy is reflected in our point acquisitions with 258 of our points from week two attributable to responses elicited from other twitter users. (including re-tweets). By day four, we had noticed that there was a bot on twitter calling itself "Bulletproof" @botcops and it was actively tweeting the target set of 500 users suggesting that poor ol' James was a bot and that the user should be wary of him. Though this tactic actually elicited more interaction between the target users and James (points for us!), as can be seen below (start at the bottom of the picture, of course).
The competition ended with the following scores:
Team EMP - 701 points ( 107 mutuals, 198 responses)
Team Grow20 - 183 Points ( 99 mutuals, 28 responses)
Team Mindshare UK - 170 Points (119 mutuals, 17 responses)
The following pretty graph represents the interaction between the teams and the 500 users:
and one of our team members produced this awesome protovis powered visualisation... it shows those of the 500 twitter users that tweeted at the bots in the competition...have a play with it...
click the image below:
Trolling:
Of course we had many examples of our bot trolling users on twitter, the following screenshots show some of the more interesting interactions we elicited. (though there are a couple of examples of our bot being a bit of a douche bag - just because of the naive way in which he would randomly pick a reply...)
Thanks to Pete aka @TinyPirate for taking these screen shots and helping to caption them:
James could be sensitive at times:
This one is kind of bad - we all went "awwwww" when we saw this one =( :
But let it not be said that James doesn't have a sense of humour:
_________________________________
Some just thought James was high on crack, or perhaps, just life!
_________________________________
Though James clearly wasn't interested in religion:
Although some people just loved to answer James' questions:
...Others were just suspicious:
Although James certainly was a friend to animals:
...and to libraries:
James also discovered that people that impersonate animals are just weird:
_________________________________
Though above all, we all learnt a lot about ourselves through James, may he Rest in Peace!
3D Printing:
So... we, Team EMP won US$500 through this competition - so what could we use the prize money for? Well after a bit of a discussion, we decided that we would buy a 3D printer... So I give you... Team EMP's 3D printer:
Makerbot CNC Cupcake
and some examples of some items we have made to date:
But of course with anything that is very much developmental, it hasn't been without it's hiccups:
As you can see in the above image plastic has leaked out between the Teflon insulator and the heat barrel. (As one of the team members pointed out, the leak looks a wee bit like a ganoderma mushroom. Turns out that this happens when there is not a tight enough seal between the heat barrel and the Teflon, a closer look showed us that the Teflon had deformed. After doing some research we decided to junk our deformed Teflon and ordered some PEEK (Polyether ether ketone) plastic from Mulford Engineering Plastics - PEEK is tougher than Teflon and won't easily deform, so for now our CNC is out of order until our new insulator plastic arrives.
---
Finally...
A big thank you to Tim Hwang and the guys at the Web Ecology Project for running this competition!
Not to mention a thank you to the 500 users that were unwittingly thrown into this little experiment
Also a special heartfelt apology to @FridayGirl1969 for James' abhorrent tweet when he was told that her cat died 
p.s. if you are mentioned in this blog post and wish to be removed, please let us know and we'll blank out your name
Stop Breaking Capitalism!!
It seems to be a growing trend lately that whenever a financial company goes belly up, governments are more than happy to bail them out - using our tax dollars too!! Since when has capitalism been about this? In my personal opinion this too nanny state, and from an extremely slanted view it’s approaching socialism.
If I started “Marks Fruit and Vege Shop” tomorrow and a year later it went belly up, following trends I shouldn’t have to worry - the government will bail my company out because I was too dumb to see the over-saturation of fruit and vege shops in the market. Any investment involves risk, it’s up to the individuals making the investment to manage the risk and invest wisely (be it in a finance company or a business venture).
Do you go ask the government for money when you lose all your money gambling at the casino? (Well I suppose to some extent state welfare gives you a safety net) but essentially: If you gamble with your money be prepaired to manage the risk and if you lose it, it’s your problem.
Adding to this, it only seems to be big finance companies that governments are willing to bail out, when smaller ones go under the investors lose everything – but if it’s a big one, by jove we better help them out?.... It should be all or nothing… Personally I’ll go with the nothing option thank you. Call it economic natural selection if you will….
What do you think?
The trials and tribulations of @nzanon
As many of you know earlier this year I created @nzanon (http://nzanon.anadav.com)
Essentially @nzanon is a service which allows anybody in the world to send a SMS message to a New Zealand cell phone number and have their message then displayed on @nzanon's twitter account.
At the beginning it worked well, but as with anything that involves people, slowly people started to test the boundaries and sure enough we had some of the most vulgar things i've ever heard being said through the service.
After warnings and a few blacklistings, I decided to take the service offline until I could be bothered fixing it. (The service, not humanity)
Yesterday I was a wee bit bored and so decided to look at the project again, i came up with two solutions which I think should work....
The two biggest type of abuse i could identify were:
- General vulgarities
- @mentioning people on twitter to insult them
The solution for number 2 is as simple as just blocking people from @mentioning anybody using the service - whilst stopping people from abusing others, it also stops a problem which wasn't in itself a "bad thing" but as NZanon has a lot of followers, people would shamelessly promote themselves through the service i.e. "Hey i'm @AeroFade - follow me because i'm awesome" or whatever.
The solution to problem number one (and I note here that this is an evolving process) is to borrow from the school of anti-spam which uses Bayesian filtering techniques to differentiate between spam and legit emails. (this is as much a test as a solution in that i am probably being a little ambitious using 140 character strings [i.e. twitter length] as training data -I also note that initially my setup has very little training data to base the filtering on so it will not work very well until it has 'seen' a lot of example tweets.)
You may ask the question, why don't i just use a simple key-word blocker, eg: blocking swear words as this will be less work than implementing Bayes. Well, without starting a philosophical debate - I don't believe swearing is too bad, but in certain contexts it can be (Usage of the word FUCK) - so i wanted to avoid being too simplistic and at least implement some sort of learning/training system.
In short: I don't expect this solution to be infallible, people will fundamentally be people and always find devious ways to circumvent safe guards. I argue that I have put in some degree of due diligence to prevent abuse of the service.
If you have something to post anonymously to @nzanon - find the number to send an sms to on the twitter profile or the website.
Peace,
Mark
An epic week for television
It's that time of year again where some of my old favourite tv shows come back on! Plus we get some new tv shows to watch too!
Some shows i'm especially lookigng forward to are Fringe and Criminal minds.. Both of which ended their previous seasons with some stellar cliffhangers! I blogged about Fringe in an earlier blog post and draw some parallells (funny if you've watched Fringe) to a series of books I've read, read it here.
In Criminal minds, Tim Curry played an awesome role in the series final, it was great to see a world class actor perform and I can't wait to see him in the new season that started screening today.
Just started on Monday was HBO's new show Boardwalk Empire. I don't know what it is about HBO but they have put out some really awesome TV shows.. Sopranos, The Wire, True Blood to name a few, Boardwalk Empire stars Steve Buscemi, screenwritten and produced by Terence Winter (Sopranos) and the first episode was directed by Martin Scorsese. Boardwalk Empire is set in 1920 Atlantic City at the dawn of proabition in America. In typical HBO style it really doesn't leave much to the imagination, nudity, gore and the acting was beautiful. Go and watch it.
To list some of the shows that are coming back this week, in no particular order of preference:
- House
- Criminal Minds
- Bones
- The Big Bang Theory
- 30 Rock
- Greys Anatomy
- The Office (US)
- Fringe
- Smallville
Next week starting again is:
- The Simpsons
- Family Guy
- Stargate Universe
How do i keep track of all of these shows and when they screen?
I use a free TV Calandar hosted by a UK based web development company called Pogdesign, it pulls data for hundreds of TV shows that you can include in your filter, set your timezone and get the local screening times - check it out:
That's about all for now... off to watch some tv shows...
Peace!
This is all about YOU! (seriously)
If you're reading this blog post then you most probably got linked to it from Twitter. At the time of writing this I have about 73,000 followers. ( @AeroFade )
I've been meaning to produce some statistics for a while on my followers, but time being time, there isn't enough of it in the day.
Finally I got my A into G and last week I extended my Ruby Twitter library to troll through all of my followers and grab user information about them including the last tweet they had posted (at the time my program created a record for them) - it actually took quite a while to pull all of the users in, even though I could grab multiple user details at a time, the API limit meant it took just over 4 hours to pull them all in.
Then I got to writing some scripts to parse the xml and take a look at some of the content... Rather than inundating you with every single bit of information, I've filtered what I consider to be useful by only looking at the "top" in all categories I have chosen to analyse thus far, the numbers in the top differ as I basically cut off anything below a 95% threshold as not being part of the top.
By the way - I like pie charts.
The above pie chart shows the top 6 domains that people link to (I caveat that by also stating that the additional category - "Email address" I put in for interests sake as if you consider all email addresses together it could be referred to as the 7th most popular)
The above shows the distribution of top level domains linked to across all tweets - (ignoring .bit.ly links etc and following them through to their endpoints)
A Tri-gram is a type of N-gram (I use this as a measure as I've used these in the past and have found some very interesting things out) http://en.wikipedia.org/wiki/Trigram - These trigrams are derived from the screen name of twitter users. One thing which did make me chuckle was that in the top 8, "ber" represented 8% of the top (No doubt because of all the users who have Justin Bieber in their name)
Finally, this pie chart represents the top 12 words in the most recent tweet for all 73,000 followers. (you'll note two non-words "rt" and "-" )
One special note (as i pointed out earlier on the reference to "The Bieb" in usernames. Out of all followers at the time, 191 tweeted @justinbeiber, 137 tweeted bieber and 37 didn't know how to spell his surname and had various miss-spellings of it.
As I get more time I'll post another blog entry with some more statistics, possibly including some calculations of entropy to show the amount of uniqueness going on (or maybe lack of uniqueness).
Can you think of anything you think would be interesting to look into? I'll include that in the next update, just leave me a comment.
Peace!
Mark