Here is another from the backlog. I have added a gallery of my experiences printing Coffin's Half-Hour Cube puzzle. It is a fun puzzle! Check it out! :D

Early prints of Coffin's Cube

Once I discovered Coffin's Cube, I really liked it. So did my friends and colleagues at work. So I started printing a bunch of them right after I got my printer. This is my first attempt. As you can see, my photography skills are not there yet, either. :)

Hints of a problem

I had some bed troubles at the beginning with printing and the cube served as a decent test. Here you can see the beginning of trouble. :(

Bed Adhesion Issues

And here is the first problem. The plastic is not completely sticking to the print bed. :(

Much better. Sicking At Last!

After re-levelling the print bed for the billionth time ;), I finally got the silver PLA to stick. I also learned bed levelling really well! :) You can also see that I am printing two cubes at a time.

Another Problem

With the bed adhesion issue resolved, a new problem appeared: Under-extrusion. :( You can see in the piece at the back under the fan that the plastic is not right. That is under-extrusion.

More Under-Extrusion

And it is not just the one piece that has under-extrusion. Several do. :(

Actually, There is More

Actually, there is more under-extrusion, but it looks different. If you look at the piece in the bottom left corner, you can see how the inner surface does not quite always touch the outer walls. There is little holes. That too is under-extrusion. :(

Fuzzy Close-Up

Here is a close-up if my pain. And it is out of focus for your viewing pleasure. ;P

Sharp Close-Up

And here is the close-up, but actually in focus. ... Actually, the shot came out really well! Shame it's for a printing problem.

Close-Up Again

One more close-up, and in focus. This is all part of the learning experience. Despite the early problems, I did solve the issues and print tons of these little cubes. Practically everyone at the office has one now. :D

Coffin's Cube - Bed Adhesion Issue

In this video you can see the bed adhesion issue quite clearly. Not everything is sticking properly to the print bed. :(

Coffin's Cube - Printing Properly

This video shows printing a batch of 2 cube going well. :)

Round 2

Fast forward about a month or so. I thought I was done printing these things, but I got a few more requests.

In Blue!

With the silver almost gone and the rest reserved for printer upgrades, I decided to do these new cubes in blue, specifically glow-in-the-dark blue. How cool is that? :D

In Brighter Light

Here it is with some brighter lighting.

Good Test!

Actually, these cubes were good tests for the plastic. I picked up some "cheap" RepRapper Glow Blue PLA. It was almost half price from the name brands, but there was a real risk it would not work with my Ultimaker 2. But it does! And glow-in-the-dark is cool! :D