everhack Stuff I've been messing with, or just thinking about.

18Feb/112

Thermofax Silk Screening

I just heard about this for the first time today from my mom of all people, a method of silk screening based on an old old outdated technology for photocopying called "thermofax". The exposure time is very fast, but does seem to require a particular type machine to do. I wonder if a laminator would do the trick? Here are some links and quotes with relevant information.. This seems to be all the rage among quilters and other fabric artists..

http://www.nehoc.com.au/products/screenfax/

"The key is the unique RISO ScreenMaster mesh [pictured left] which is a ‘lamination’ of polyester mesh and a specially formulated plastic film - pre-coated enabling it to be handled and imaged BEFORE it is put onto a frame for printing without changing/ distorting the design.
By using a simple carbon design, commonly a photocopy or laser print, the fine thermal film [the pre-coated side on the ScreenMaster mesh] is burnt away during the thermal imaging process. The imaging process can be performed on a bench top in any light conditions."

http://thermofaxconfidential.blogspot.com/

"Here's a list of pens that have enough of a carbon content that they will react with Riso Film:

Black Sharpie
Pentel Color Pen
Tombow Brush Pen
Itoya Fine Point (non permanent)
Pigma Micron
Pitt Pen
Zig Calligraphy
Staedtler Pigment Liner
Rapidograph Ultradraw
Stabilo (all)
Ritmo Charcoal
China Marker
Staedtler 2b pencil
Sanford Uni-Ball
Black Crayon"

http://www.quiltingdaily.com/blogs/pokey/archive/2008/06/11/thermofax-screen-printing.aspx

"An alternative to traditional silk screening, Thermofax screens can be made quite easily with images that have been copied using a copier machine. (You need the ink from a copier machine to successfully make the screen.) There are new thermal imagers on the market, or you can buy a refurbished Thermofax machine from Welsh products or go on eBay and bid against tattoo artists who use them for transferring tattoo designs. If you don't want to buy a Thermofax machine but want to have something transferred to a screen, there are also people who will provide that service for you."

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5Feb/110

Etched Beer Cans

Okay here's another fun process I discovered today!

Take an aluminum can and carefully cut it open and make the largest, flattest rectangle you can out of it.

Design a project where at least one layers is a "draw" layer, and one layer the "cut" layer.

Secure the aluminum, inside up, to a very sticky cutting pad. Best to secure the ends to the mat with some clear packing tape.

Using any old used blade, cut the "draw" layer on blade depth 6 pressure 3, just one pass.

Next, cut the "cut" layer on blade depth 6 pressure max, multicut 2 passes.

Remove the aluminum from the mat (carefully so you don't curl or crease it up any worse), and drop in a Metal Salt etching bath. Etch it, checking occasionally, until the straight lines of the "cut" layer start to break free. Let it go just a little longer and remove from the bath. Wash well in soapy water and dry well. Starting at the straight areas, find a starting point where the cut line has parted, and use your fingers to finish separating the pieces.

I like this because it's like print & cut, without alignment hassles. It also gives you a way of drawing fine lines with the blade that don't have the tiny jitters you get with fine point pens. The double cut lines will etch clean through the metal while the single cut lines just turn really dark gray.

-David

Filed under: Cricut, Metal No Comments
4Feb/110

Custom Pen Holder for the Cricut

My friend Jerry and I designed and made a custom pen holder for the Cricut the other evening (mostly him :), and I finally got to try it out, with mixed success.

He blogged about the build here:
http://jerryarutherford.blogspot.com/2011/02/making-stuff-again.html

While it fulfills the original requirement perfectly (hold a staples mini gel pen accurately), I realized I wanted something that would hold -any- suitably sized implement.

The fit and finish are outstanding, but as it turns out, the tiny hole in the bottom of the holder end up being the limiting factor and just doesn't leave enough room for adjusting pens up and down. Different pens have different profiles and tip sizes, and a colored pencil with that small of a tip went dull within just a minute or so.

So, much as I hate to hack off that pretty nosepiece, I think I'm going to try making it more useful by just hacksawing off the first half inch or so of the unit, leaving the whole thing just a straight tube down the inside. This certainly simplifies the design as well.

The thumb screw and close fit bore hold the pen well enough already that jaggies in the output are visible from the mechanical and software limitations of the system, and not from slop in the pen rattling in the holder. This should give me enough flexibility to use colored pencils better (they get dull really fast so you need to adjust more often), as well as mechanical pencils or any tool I could make out of a coat hanger or other thin rod or dowel.

Note: the easiest solution for using alternate pens is just wrapping thin strips of masking or metal tape around where you want the clamp to grab and works just fine. Unfortunately the pen cap cant be put on anymore with the tape in the way, and you have to do this with every implement you're going to use.

-David

Filed under: Cricut, Metal No Comments
2Feb/113

Spring Riders

Ever since my son Zev was born, I keep wishing for adult-sized versions of some of his various toys.

I always loved Spring Riders as a kid, even though I never knew what they were called 🙂 My idea is to make a pair of them for my back yard, a large one for myself and a smaller one for Zev.

Here's a photo of one. You sit on it and hold on tight and it bounces when you shift your weight. There's lots of possible variations from a flat board with a bunch of springs underneath, to a horse on a leaf spring that just rocks forward and back.

Example Spring Rider

Here's a bunch more styles sold by one company "WillyGoat Toyland>". Prices on these range from $500-$3500, but they do have some really great designs, I especially like the Scoop Digger, Round we Go Playground Rider, and the Two-Seat Retro Rocker.

I notice at least one is "constructed of heavy-duty UV stabilized polyethylene", so I was thinking I could construct a skeleton of 1/4", 3/8", and/or 1/2" round mild steel, and use ironed grocery bags for the skin. I also have at least one old motorcycle shock spring for the bottom.

I still have not yet settled on a design for either yet.

Filed under: Metal 3 Comments
2Feb/110

Plastic Sheets from Grocery Bags

Planning to try this method for making plastic sheets out of used grocery bags. Hoping this might be a usable material choice for my springriders project.

Ironing Plastic Bags Together

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1Feb/110

Healing Plate

Here's an idea I've been wanting to try for making invisible images on plexiglass using short-wave UV light.

(plus a detailed explanation of an imaginary "healing circuit", written by my father way back in 1974.

Experimental HEALING ENERGY PLATE by Howard W. Mitchell.

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1Feb/110

Cricut Wiki Page

I've created a page in the Wiki with useful information and links relating to hacking and using the Cricut.

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