Control Numeric Machining - Make Something Big
This week I focused more in learn how the milling and carving was done, to have more skill in the change of bit mills and how to operate the machine, that is a dangerous one. To have more freedom in the future. My low proficiency in parametric design programs still stooped me to make interesting things.
Lesson
Academany Fab-2016.03.09D Lesson 07: Computer-Controlled Machining from Fab Academy on Vimeo.
Review
I use a couple of minutes to show Neil my Fabshield
Academany Fab-2016.03.16B Review 07: Computer-Controlled Machining from Fab Academy on Vimeo.
Project
In the project web you can see another example of using the CNC, where the structure of the pyramid and the Z shape display are made with the CNC and they use pressfit joins.
Ideas and test
Ideas
Dreaming is fine but doing is better, and I get struck in perfect dreams. I tried to advance and learn a little more with Grasshopper as I strongly think that parametric design is a great tool for easy scaling the joints of a design faster and more accurate than with a classic design tool. But for that task you need time for learning and time is a valuable resource than a fablab student don't have so many times.
The North Remembers
I had still to make some real work in the CNC from a previous course that my instructor Nuria Robles taught for the basic of design and all the security norms you have to follow to use correctly the machine.
As I didn't to cut and build another seat as I saw the ones made by my fellow students I choose to take a free vector logo of the Stark House of Game of Thrones as was a easy cut for start learning and I could think to made something with the scales of the direwolf.
I could take some little piece of wood to make a 50x60cm head, is not bad plywood 18,6 mm plywood and the result was nice.
Typical parameters except for the depth of the material for cutting with the 6 mm bit.
Routes for the dire-wolf head.
The scales were made with a boxed technique carved 10 mm<./p>
The cut line was made with a 6mm drilling bit and you have a fierce dire-wolf head with big open mouth.
Coat of Arms - Shield
I decide to take the risk of let pass the chance of making a practical study of wooden joints as I had several problems with the design programs and practice with a project with several layers and try to make a little more difficult and time consuming project but still affordable.
My city León in Spain is a town with more than 2 thousand years of history, and was an important kingdom in early medieval ages, around XI and XII centuries. The Cortes of León from year 1188 was a parliamentary body in the medieval Kingdom of León. According to UNESCO was the first sample of modern parliamentarism in the history of Western Europe.
So I designed a simply coat of arms
Milling the shield of coat of arms
I used 3 types of bits, 2 plain ones of 6 and 3 mm and a conical of 12 mm and 90 degrees.
You have to be very careful to tighten the bit, to secure it. 6mm drill bit in the picture
To don't make a over complex model I just make 6 paths. I have to change some parameters as I realize some mistakes, like that in the same path was objects that in the real model wasn't in the same depth.
The picture said that it will take 3 hours, but with that modification and my lack of skill for changing the bits as I was more than 4 hours and 30 minutes.
Milling the inside part of the shield, from 0, to 5mm deep. You can see the silhouettes of the lion, gears and Fablab logo
The material wasn't the best and make lot of dirty borders, you can clean them, but I don't recommend it for a professional work. The 3 mm bit didn't make a great job with letters
Parameters of a 3 mm flat milling bit for making the details.
Parameters of a conical milling bit for making the border of the shield
Finishing the border of the coat of arms.
You can compare the size of the shield with me, it's size is more than 80 cm width, and I'm more than 190cm of height.