Design a toy car in Fusion 360

November 4, 2016

toycar

3D Modeling is a very powerful technology for designing and prototyping products. I recently prototyped some espresso dosing funnels. For prototyping I used CAD program Solidworks. This did unfortunately not natively run on my Mac but I was able to run it in a virtual machine. This approach however did result into many crashes and sluggishness. To end my frustration I had to use a CAD application that was meant to be used on a mac. One of those programs is Fusion 360. A few weeks ago I decided to start following a Fusion 360 3D printing course. I find that the program has a learning curve but I find it quite user friendly and effective. Read More

Tiny Fluid Bed Roaster update

September 19, 2016


(movie by Frans Goddijn)

Last week we updated the Arduino software of our air roaster prototype. Tije fixed the new safety switch that I brought along. In case of software failure, you want to switch off the heater and keep the blower active in order to cool the beans and prevent overheating of the blower and heating element. The switch bypasses the relays that are controlled by the Arduino control board. We also tried a new Artisan sketch that supports a “background roast” using the Artisan PID to follow a pre-designed roast profile. Read More

Simple affordable-for-all fluid bed roaster

August 16, 2016

Tije design and construction of the roaster

Tije de Jong, Frans Goddijn and I are thinking of a small simple affordable-for-all fluid bed home roaster for coffee. The roaster is supposed to roast 200 grams of coffee and work with the Artisan roast software. Furthermore the machine is intended to have PID control and adjustable airflow. This combination of things would make it an ideal home or laboratory machine that will let you precisely execute predefined roast curves, roast different batch sizes and give consistent results. We decided to open source the design of this machine. This enables you to build this roaster yourself, contribute and help to further develop the machine. Read More

Espresso dosing funnel design

August 15, 2016

Dosing the coffee in the espresso portafilter basket and distributing evenly can be difficult. A small funnel can help to ease this proces. Tije made a beautiful one for me and there are funnels on the market like the IDR dosing tool. I’ve recently learned how to draw in 3D and I thought it was a good exercise to made a first design. The prototype is not final and I haven’t tested it yet. You can however download and print the design yourself. Don’t forget that you will need to print it a bit larger (approx 1.5% for ABS) because filaments tend to shrink after printing. Let me know what you think about it.

Read More

La Marzocco Linea Mini, first shot

July 19, 2016


Frans Goddijn and I are reviewing the La Marzocco Linea Mini this week (to be published in an upcoming issue of KTC magazine) and here we extract a first espresso, using the double basket included with the machine, the heavy double spout portafilter, the LM tamper that comes with the machine. Also using the Acaia scales and a Compak grinder. Monitoring the group temp which is very stable around 83ºC after we set the extraction temp on 93ºC using a small mechanical wheel on the top left of the machine. The roast profile shown briefly during grinding is made by the free Artisan roast control & logging software supported and developed by Marko Luther.

This post was first published on kostverlorenvaart.nl.

Affordable fluid bed roaster

June 3, 2016

Tije de Jong, Frans Goddijn and I are thinking of a small simple affordable-for-all fluid bed home roaster for coffee. We use some hard- and software idea’s from the Roastuino project. Today we installed the electronics and tested several configurations. The results are promising. To be continued!

Sudden Coffee – Just add water and stir

May 19, 2016
sudden coffee instant

By Frans Goddijn & Jan van der Weel. This blog is also on kostverlorenvaart.nl

Travelling can be tough when you are used to excellent coffee. How does one prepare a decent cup on the road if there is no specialty coffee place in sight?

You can load all your equipment in your trunk but this isn’t a very practical solution when you travel by airplane or when you drive out to very remote places, if you want to go backpacking or if you don’t want to have another coffee related argument with your partner.

Now there might be a simple solution. A relatively new company, Sudden Coffee, promises to offer a solution. “Just add water & stir – it’s really that simple”, they say. Read More

‘Kitchen stress’ relieving coffee station

March 24, 2016

coffee station

I know that this coffee thing has got out of control. It has taken over our house. Our kitchen has become something of a laboratory. This 5 square meter space is crammed with cutlery, cooking equipment, kitchen appliances, dishwasher, washing machine, fridge, deep freeze, a vegetable stall and all of my coffee things: a giant roaster, a huge grinder, a big espresso machine and lots and lots of other coffee related stuff.

I have tried to convince my girlfriend that our kitchen situation was quite normal. This was everybody’s kitchen situation, I could hear myself say. However my words weren’t compelling and after some time I had to admit that she was right. Entering our kitchen gave me bad vibes. It was absolutely no relaxing feng shui environment. It was certainly the worst room in our house. Also, the space was not very practical. All the kitchen counters were filled with stuff. There was no more room left for cooking. That’s why I could regularly find my girlfriend on the kitchen floor, the only ‘open space’ left in the room. While cutting vegetables on the cold floor I ofter heard her mumbling ‘I hate this kitchen’. Read More

How to fix a La Marzocco GS3 pump on the cheap

March 24, 2016

Recently the pump of my LM GS3 espresso machine broke. It was the second time the machine experienced this problem in a period of one year. The problem was quite substantial. The pump refused to run after pushing the brewing button. This brought me in a depressing situation. I wasn’t able to brew any espresso.

The cause of the problem

What was the cause of this problem? Inspection showed that the vane in the fluid-o-tech pump head didn’t turn smoothly. That made it impossible for the motor to drive the pump head.

pump head rotary pump
Failing pump head la Marzocco GS3

Read More

An Afternoon at the Opera

February 12, 2016

Roemer Overdiep made a wonderful video of our visit, see it on Vimeo.

[Text by Jan van der Weel and Frans Goddijn]

The Sanremo “Opera” machine development used the input of an international array of baristas like John Gordon (New Zealand), Serif Basaran (Turkey), Sasa Sestic (Australia) and even Torpong Tantraporn from Thailand.

This “dream machine” is new to The Netherlands so Maarten Meijer of Sanremo Netherlands invited us to come and have a closer look. Read More