Showing posts with label making. Show all posts
Showing posts with label making. Show all posts

Sunday, November 10, 2013

screenprinting - making the perfect screen

lion-tee big.jpgthere are many tutorials on the web instructing home-based screenprinting techniques, but most fail to mention the two most important tips for creating quality, affordable prints at home. The first is the importance of how taught or tight the mesh must be, the second involves something called the "snap". This instructable shows how to make adjustable screens to ensure the tightest of screens, and then explains the "snap"DSCF1426.JPGThis is what is required for this tutorial:
1 pine strip (1.8m long) and 22mm x 22mm.
4 x bolts (70mm x 6mm) with their accompaning nuts.
a drill (with 6mm bit).
staple gun.
wood glue.
mesh ( i've sourced mine from screenprinting suppliers and is a 55 mesh count)

View the original article here

Thursday, October 3, 2013

Making an atabaque from A to Z

An atabaque is an Afro-Brazilian drum similar to a conga, but not as refined in the sound or the manufacturing process (but that does not mean it does not sound or look good). It's the 'rough' appearance that makes it stand out from other drums. 
It is used in Capoeira and Candomble (Afro-Bahian religion) as well as some other activities.

First off, I'd like to express my gratitude to Chapa de Frente for his tutorial on how to make an atabque.
I did quite a lot of research on the topic, watched a good amount of footage and DIY videos 
(links are given on the last page) here and there and the work of Chapa de Frente was the more reusable.

Still, all units and materials are specific to the US, and being in Australia, I just couldn't do the same.
Also, there was a number of things I wanted to attempt in a different way.
Lastly, there is no word whatsoever on the metal work involved. I tried to get quotes for that here in AU, and it was ridiculously expensive (like 100$ for a ring that costs 6$ a meter at the shop).

In Australia, capoeira is still developing and not as widespread as other places, but import restrictions are EXTREMELY tough. Wood and Skin are an absolute nightmare to get through. It's also very expensive to buy an atabaque in the first place (say 800$ plus shipping).

For all these reasons, I set out to build 'meu atabaque' from scratch, using methods explained in various places (including coopering ) and in the beautiful tradition of sharing for others to try themselves, I present my humble (sometimes very humble) construction methods.

It will cover
- build methods for both body and stand
- woodwork
- metalwork
- ropework
- notes on skin (unfinished)

I do not have any prior instrument-making skills, but I like a good challenge and above all I like fixing and tinkering.

If you're keen to make your own atabaque for a cheap price, read on. Bunnings has most of what you need.
The information presented here can be used in pretty much any country, providing you are motivated enough to find the materials and a way to use them to achieve the same result.

Targeted end result
A 24 staves atabaque that looks the part, 1m tall, 300mm at its widest point, 250mm at the skin, rope tensioning system and a matching stand.

A word on materials
The list presented here is probably not the most suited for the task, but it did the job.
The wood I used for example, is Tasmanian Oak because it is a local wood, cheap, pre-cut to the dimensions I needed at  Bunnings. My research indicated that atabaques made in Brazil used to be made out of Jacaranda timber, but being now a protected species, nearly all of them are made of Pine. Bunnings has pine (that did not look good or flexible/strong enough to bend without breaking) and then Tassie oak. That's it. Short of going to an expensive special-purpose timber shop (that I have since found), the oak had to do it.
The metal is mostly scrap I collected. If you can buy it to the right dimension, go for it.
The skin remains an issue. I have not sourced a skin (calf/cow) yet and used a large piece of leather instead. It does the trick but I think the sound would be sensibly better with a real skin. Since it involves re-heading and thus re-doing the ropework, I'll save that for later :)

Materials

Drum Body
8x 40x10x3000 Tasmanian oak boards
3x 10mm x 10m Sisal rope
1x 6mm x 5m Sisal rope
1x 12mm x 1000mm steel rod
2x 10mm x 1000mm steel rod
4m 1mm x 30mm steel strip
7mm x 4mm steel rivets
wooden glue
wood stain
wood varnish
1x 700mm diameter skin/leather piece
black metal paint
hard wood for pegs

Stand
3x 40x10x3000 Tasmanian oak boards
1.5m 2mm x 30mm steel wrap
7mm x 4mm steel rivets
wooden glue
wood stain
wood varnish
tapestry nails
200mm x 1000mm leather piece
black metal paint

Tools
(the more the merrier)
circular saw (better: bandsaw, even better, router)
drill with drill bits and countersunk bits
sander
sand paper
hand saw
files
vice
hammer (large heavy for metal work, smaller ones for other work)
ropes and ratchets
clamps
planners

Others
In the course of making the drum, I had to make multiple jigs, for cutting, bending, adjusting etc. I had to get creative for some of them. You will likely find a better way to achieve the same result based on your own resources. Assess them !

IT TAKES TIME so don't rush it. you WILL get stuck at some point. You WILL make mistakes, be it in the preparation, cut or assembly. It's OK. just think before you act. Take your time. Between week ends and evenings, it took me 6 months to make mine.

On to work
This is how we are going to proceed:
1 Making the Base Stand
- woodwork
- metalwork
- finishing
- leather padding
2 Making the Body
- woodwork
- metalwork
- finishing
3 Heading the Body
- metalwork
- ropework

Chronologically, I made the stand after making the body. But this does not matter much.
There is a fair bit of specialized metal work that I completed using very humble means. People with more experience and machinery will likely laugh at it, but I got the job done nonetheless.

Dimensions
I had to pull trigonometry and primary school math to get it done. It was sort of fun. Angles and dimensions are approximative but they do work as intended.

Stand:
Diameter at the base:
Diameter at the top:
Staves: 24
Stave length: 300mm
Stave cutting angle: 7.5 degrees (180/24)
Stave cutting point at the top:
Stave cutting point at the base:
Metal hoop cone angle: 5~6 degrees

Body:
Diameter at the base:
Diameter at the widest point:
Diameter at the top:
Staves: 24
Stave length: 1000mm
Stave cutting angle: 7.5 degrees (180/24)
Stave cutting point at the top:
Stave length from top to mid-section:
Stave cutting point at the base:
Stave length from mid-section to the base:
Metal hoop cone angle: 5~6 degrees
Metal ring diameters: (top) (below top) (bottom)

Total weight after assembly: (need to check)


View the original article here

Wednesday, October 2, 2013

Trying my hand at: Mold Making and Casting with Silicone RTV [Pittsburgh Tech Shop]

2013-06-13 21.11.00.jpgToday at the Pittsburgh Tech Shop, I took a class in mold making and casting. This is a great technique for making multiple copies of a piece out of resin. It's used in sculpting, prop making, special effects makeup, and many more applications. This Instructable is the documentation of the class in which I found a piece to copy from the part bins available at the TechShop, cast a mold out of silicone, and filled the mold with resin.

I will discuss the process of casting beginning with choosing a piece to cast, making the mold, and casting a piece from the mold.

More information about the Pittsburgh TechShop can be found at http://techshop.ws/

I made it at TechShop!

2013-06-13 18.25.27.jpgIf you have a silicone mold already available to you, the casting process does not take very long. If you're starting by making the mold, however, be prepared to wait at least two hours for the mold to cure. Be sure you have the following before beginning:

Time: at least 2 hours for a small project
Tools:
-latex or rubber gloves
-utility knife
-4 paper cups for measuring
-2 paper cups for mixing
-paper or plastic cup to hold the silicone
-hot glue gun
-wooden mixers (popsicle sticks)
Materials:
-something to mold
-silicone RTV
-urethane liquid plastic resin
-Ease Release agent

You should coat the surface that you're working on in a disposable material to catch any spills. It would also be a good idea to have paper towels on hand to clean up messes. 

Necessary materials can be purchased from websites such as http://www.smooth-on.com/


View the original article here

Monday, September 2, 2013

Apple Is Making Badass New Mac Pros

Today during the WWDC keynote, we got our first look at what Apple is thinking in terms of the future of Mac Pros. Everyone who said the Mac Pro is dead can just shut up. Here comes a new freaking generation of high-performance computing from Apple, and we couldn't be more excited.

The new Mac Pro will support up to 12-core configurations. They've got the fastest ECC memory the company has ever put into its computers, which is clocked at 1866MHz DDR 3.

For I/O, the new Mac Pros will support (of course) FireWire, and the brand new Thunderbolt 2 standard.

There will also be AMD FirePro graphics capable of running up 4K out of all of its ports—up to three UltraHD displays simultaneously. These are full-on professional machines for current pro users. Apple's demoing Pixar animation this week, running on these machines. Doesn't get more taxing than Pixar.

Apple Is Making Badass New Mac ProsS

And of course if you're looking at this thing, you can tell it looks different than the old aluminum boxes we're used to looking at. It kinda looks like a giant trashcan! But the new circular design means the new beasts are 1/8 the volume of the last iterations, while still allowing easy access to the guts for breezy-fast hardware upgrades.

Further details are scarse, but we do know two things: They're made in America, and available later this year.

Hell yes. [Apple]


View the original article here

Sunday, September 1, 2013

Making a 1 Watt Solar Array.

I love my neighbor’s garbage I call them the parts department. In this, instructible I am building a Solar Array out of 30 solar lights my neighbor threw out.

For this project I am only going to use 18 of the solar cells for the array I am building. The array will be able to charge a 12 volt 10 watt hour battery in a day. The total cost of building this array is about 5 dollars, a comparable array or solar cell can run you 60 dollars.

Since all the parts are salvaged, I will test every thing every step of the way, I don't want to completely assemble the array only to find out one of the components I used is faulty.

For testing you will need a multimeter.


View the original article here

Thursday, June 6, 2013

Ars Technica reports that AT&T doesn't want all its users making video calls over cellular data just

Ars Technica reports that AT&T doesn't want all its users making video calls over cellular data just yet. The recently-announced revamp to Google+ Hangouts won't connect on an AT&T Android smartphone unless you're connected to Wi-Fi. You won't find yourself restricted if you subscribe to a tiered or mobile share plan. Those with unlimited plans and LTE-enabled devices can expect full video chat support later this year.