For this project, a couple of makers had some concerns about the ABS plastic filament for the Makerbot (3D printer; Cupcake version) being lightly coiled, zip-tied together, and strewn about the desk. In one instance, the filament kinked and a print got interrupted midway through.
After a brief discussion, I decided that this was worth tackling and I designed two projects: making spools for the filament and a spool holder to keep them above the desk and out of the way.
(Note: I'm including what I used here, but this is by no means the only way to do it. I used what I was familiar with and what we had on-hand. Your results may very. Consult physician before stopping project. Do not attempt on an empty stomach. Do not drive or operate other heavy machinery while attempting to drill, cut, screw, sand, or stain project. Have a nice day. Be kind, rewind. )
For this Instructable, you will need:
-A sheet of light, 1/4 inch plywood (I believe that a 2'x3' piece should work fine)
-Some narrow, heavy-duty cardboard tubing (this one came from a roll of plastic sheeting), 2 1/4" outer diameter, 1/4" thick
-JB Kwik (quick setting 2 part epoxy) AND a softer, two part epoxy. (I found that the JB Weld tacked things in place nicely, but I wanted something easier to mold so I could work it into the joints)
-A saw (I used a bandsaw here, but I suppose you could get the same result with a hand-held scroll saw)
-A disc sander (for smoothing out the plywood discs)
-A power drill (I used a drill press)
-A hole saw (Make generic, unfunny whole/hole homonym joke here)
-A compass (The exciting, circle-drawing kind, not the boring, magnetic kind)
-A beer (...As a reward for after you've finished the project. I do not condone drinking and operating power tools; this is how people end up in the ER with fence posts stapled to their face....)
Step 1: The Dimensions
Remember that the center has to be hollow so that it can slide onto a dowel for use. I ran into a problem here, but more on that later.
First, get the outer dimensions of the circles for the outside of your spool. Mine came to about 8" in diameter.
Next, measure the inner diameter of your cardboard tube. Mine was 2".
A friendly tip : I find it easiest when cutting circles to place them as close to the edge of the material as I can. Not only does this cut down on waste, but it reduces cutting time by up to 1/64 of a minute or, for the metric-inclined, 1/64 of a minute.
Using your compass, set it to the outer diameter and trace 8 circles on your 1/4" plywood.
I cannot stress this enough: Always mark your center-point!
It is incredibly easy to lose that tiny dot left by the point of your compass that marks the exact center of each piece. You might not know it, but you will need it at some point (and, in fact, at several points in this Instructable). Put a nice little "X" there. Even better, you might want to consider hitting it with some fluorescent paint.
Set your compass to the interior diameter of your cardboard tube and trace another circle using that wonderfully highlighted, blacklighted, X-marks-the-spot-center-point that you so thoughtfully marked after the previous step.
Wow. You should now have donuts traced on a board. Take a step back and congratulate yourself while no one's looking.