One of my neighbors threw out a standing floor lamp after breaking the shade, or globe, or whatever was on top covering the bulb.  There was nothing wrong with the rest of the lamp, and, although I didn't have any real plans for it, I took it home.  It stood unused in the closet of my in my apartment for about 6 weeks.  I had ordered some 3mm glow in the dark ABS filament, and thought, what if I create a lamp shade out of this for the lamp.  I thought I'd do something really off the wall, and started the design as lamp looking thing with lots of holes in it, so the bulb wouldn't overheat.  It took me about 8 hours to design it, and I sent it to the printer.  One of the problems with printing surfaces with holes in them is that the plastic has a tendency to curl as it cools, because it cools quicker out at the edge than it does in the center.

About half way through a 12 hour print job, the curled up portions got in the way of the print head.  when the print head hit the curled up portions, it stopped, skipped steps, and continued to try to print, but everything was now out of alignment, so the layers were not printing where they were supposed to. :-(  I realized this artistic design was just not going to work with this kind of printing.  It also looked more like a block of Swiss cheese than the cool lamp I thought it would be.

I had some 3mm transparent ABS filament that I used on another project, and figured it might make a pretty cool looking lamp too.  Although the filament is transparent, it becomes translucent when extruded.  I redesigned the shade in Google SketchUp to look like a street lamp, which would go really nicely in my apartment against the full length wall mural of a London city street.
The lamp is a two part design, with a top and a base, so you have access to the bulb by removing the top.  The redesign work took about 4 hours.  I printed the top on myAirwolf3D v5.5 which took 3:41.  I couldn't print the base on the Airwolf because it only has an effective build height of 100mm (4in) and the base is 195mm (6.7in) tall.  So I printed that on my modified Prusa i3 which has an effective build height of 255mm (10in) Printing the base took 15:32.

Since the bulb is going to be fully enclosed, I chose a10 watt TCP LED bulb for the lamp.  Here is what it looks like in my apartment.

While I was working with the Mauldin High School engineering students, one of the seniors, Stefan said that he and his dad were working on an old Kawasaki motorcycle.  The button for the horn was broken and they couldn't find a replacement.  Using an AutoDesk Cad program, I'm not sure which one, Stefan created a 3d model based on the broken button that they pulled off the bike.  We sliced and printed it 3mm black ABS and he took it home, only to find that it didn't quite fit.  We took the .stl file he had, and imported into GoogleSketchUp.  We made three or four different versions of the button, each with minor dimension and shape differences.  He took them home and this one worked perfectly.  I'm not sure how long he worked on the original design file, but we spent about 30 minutes tweaking it and another 15 minutes printing them.  #Abstract2Actual ca. 2:00

One of the Senior engineering students at Mauldin High School wanted to showcase his design skills by creating a custom plaque that he could take with him off to college.  I have no idea how long it took him to design, but It was very detailed, so I imagine he had a lot of hours in it.  The print time on this plaque was four and a half hours.

To make the lettering and emblem stand out, I switched out the filament on the fly when the print job got to the last flat layer of the plaque.  It turned out really cool.

We used 3mm orange ABS and 3mm white ABS for this project

A couple of the senior engineering students at Mauldin High School are on the robotics team.  Josh and Stefan (below left) have been really involved with the printer build there because they saw a lot of potential use for the printer in their robotics program.  Using an Afinia 3d printer, they built the two axis  servo mount (below right) using a design file downloaded from Thingiverse.com.  they hooked the servos to an Arduino , added a joystick controller and a web cam.  Now they can remotely operate the webcam to look in any direction.