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3D Printing

2 Posts authored by: djsloanau

I just recently built my Printrbot Junior v2 3D printer and have been printing test pieces in order to calibrate the printer. Now that all that is done, and after printing a filament guide to keep my feed line under control I decided it was time to design and build something.


I am attempting to build an Ironman MkIV suit for my son, and the arc reactor in the chest is one of the toy ones which light up and make a noise when you press the front. That was ok, but the lights were pathetic, so I decided to add an array of LEDs to make it brighter. This would involve extending the arc reactor by about 11mm to allow for the installation of a LED torch head (torch shown but can't source them anymore), and a transparent plate made from a CD packing disk. This would allow the original lights to illuminate the reactor when the power to the main LEDs was removed.

Arc1.jpg arcinsides.jpgtorch.jpg LEDS.jpg

So I designed a ring which fitted inside the top and covered the bottom with extension posts for the screws. In the top I added pins to locate in the existing screw holes in the top, and put screw holes in the bottom of the posts for the existing screws. The design was done in Lightwave modeller v8.5 and exported as an STL file. Repetier host flagged some issues with the designed file, so I ran it through the online STL checker at which fixed the problems. I then printed the file in PLA. I wanted to use ABS plastic which is stronger and not so likely to degrade in sunlight, but I have been having so much trouble getting it to print well that I decided to use the PLA and paint it.

extbot.jpg exttop.jpg pinsin.jpgtopfitted.jpg

As you can see, one of the locating pin holes was missed in the 3D print. For some reason when Slic3r sliced the object it filled in the top of the post, but not the bottom where the hole printed fine. But that's ok, I can drill it out.

The extension fitted perfectly in the top, and with just a bit of sanding on the inside of the bottom of the extension  to remove some artefacts and ridges from the printing process, it fitted over the base and the posts seated perfectly with holes lined up with the screw holes.

finished1.jpg poweron.jpginstalled.jpg


So there it is, comments, questions and criticism welcome.

Hello world, I have been on this site for quite a while, but never used it, so here is my first post.


I just received my 3D printer, a Printrbot Jr (V2) from Printrbot on Tuesday 4th February 2014. The good news is that it all appears to be here and in good condition, the bad news is that it is a kit and I had to build it, which isn't fun when you have arthritis.

I painted the Plywood parts machine shop orange mostly to protect them from warping if it gets damp. Assembly has taken place over the past 3 days and I am now at the stage where I am about to plug it in and calibrate it. (It is hard to type with your fingers crossed). The PSU has fired up with no bangs (I made sure the Voltage was set to 230V as it was shipped from the US.) I must admit I am a bit scared to plug in the printer, it all seems so McGyver built, but I followed the instructions to the letter. Unfortunately the instructions seem to contradict themselves at times. That and the fact that I ordered the new aluminium extruder kit and have installed it trying to follow the instructions which shows the procedures for every other Printrbot printer except this one.


The last photo is of the temporary Y-axis tensioner that I made out of scraps from the project. The kit doesn't have a y axis tensioner, but strangely does have an x-axis tensioner. I will eventually print a better one once I get it all calibrated and working.


Ah well, here goes. If you hear a loud BOOM and see a mushroom cloud over Adelaide it means I must have got something wrong.


More to come...I hope :-)

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