I would like to quickly add now that using a laser printer to print the patterns worked well but not as good as it could be! The colours look a little faded when projected on a wall but still looks very cool and gives you a great point to start improving from! There is plenty of room for improvement on this project so please send through your ideas or add to mine! This has been awesome fun!
So heres how I did it....
Step 1: Understanding How the Cassettes Work
The cassettes have the following components:
- A static image (which is still, does not move)
- A moving or turning image.
If you take one transparent "star burst" image for example and make a duplicate of it, place one on top of the other but slightly off set the centre of the 2 images, suddenly you get the "moire affect" (see image). Move one of the images around slowly on top of the other and you start getting 3D type effects going on. Very interesting illusion.
Imagine then projecting that hundreds of times larger onto a large wall, trees, stage back drop etc.
That is what this project is about! :) Enjoy
Step 2: What You Will Need...
• 60mm PVC pipe (any length, you will only need about 50mm for each cassette)
• Transpareny Film (I used overhead projector film found at Officeworks)
• Good laser printer – for printing your patterns onto the transparency film
• Strong glue – plumbing/pvc glue would be best but not necessary
• Sand Paper – various grades but some fine grit for finishing is required.
• A vice is handy for this!
• A tool to cut the pipe as straight as possible – I used “The Renovator” (as seen on TV ï). A small band saw would be perfect if you have one.
Step 3: Method:
• Cut 1 ring as seen in the above picture. You then want to estimate and shorten the diametre of the cut ring so that it fits tightly into the main uncut ring. Throw the cut ring into a pot of boiling water for a few seconds as this softens it up and makes it easier to shape and fit into the main ring. Allow it to cool in place because when the PVC cools, it trys to spring back to its original shape. Having it inside the main ring as it cools restricts is expansion. : ) (See next step for pic of this)
Later, you will cut your circle patterns out from the transparent film and one will sit inside this part resting on that ridge. Make sure the ridge is fairly smooth so there is minimal friction when the device is turning! Sand off the excess glue etc.
• Once the new inner ring has cooled, glue the cut closed to complete the circle again.
• I then cut some little “wings” to glue onto the sides flush with the top. These will be used to attach the inner ring to the rotator. (This part is probably confusing you? Because the original cassettes require a specialized cassette rotator : | I have come up with an idea to turn one of my several wheel rotators into a cassette rotator. See Here
• Sand back all the glued parts so they are smooth and do not affect the turning action of the cassette. You can paint your cassette any colour you like to tidy it up.
You have now created the static part of the cassette!
Step 6: Now You Are Ready to Find or Design Your Patterns!
In MS Word, use the shape tool and create a circle that is 50mm in diametre. Print it out on A4 paper then measure with a ruler to see if it is coming out to scale. If not, adjust the size of your circle in MS Word accordingly. Test print. Once you get the circle shape correct give or take 1mm, start importing your patterns and resize them to the size of the circle. You should be able to fit 3 patterns wide and about 4 down. Once done print onto your transparent sheets. I did mine on the laser jet printer at work. Came out really well. The colours look slightly faded but not too bad for my first shot!