Wesley's Tool-Box

One of the fun things about 3D printing is that, with a clever design, you can have movable parts already inside the printed object. One fine example is having captive wheels inside toy cars, like the ones you see here. No assembly is required - they are already inside the main body and can freely turn after scraping off some excess materials unintentionally introduced during the print. Here is the video of them in action.

My Makibox 3D printer was doing very well up to early this month. But then suddenly, it decided to stop pushing the plastic filament into the extruder. After some manual pushing, it worked again for a while, but then it'd stop yet again. Looking at the filament, I saw some grinding, so I initially suspected a clogged nozzle. But if I disengage the filament from the feeder and push the filament in by hand, the nozzle had no problem putting out the material. So I took the filament feeder apart.

Now, Makibox's filament feeder is called "Zen Drive". It consists of a stepping motor with toothed axis and a tension wheel. The teeth "bites into" the filament to make it move, while the wheel allows the filament to catch onto the teeth in a consistent manner. When I disassembled the Zen Drive assembly, I noticed that two of the wheel's spokes had snapped. Snapped spoke meant that a consistent pressure couldn't be applied to the filament. This was the cause of the inconsistent filament feed I experienced. It was time for a repair.

Musical instruments must be shaped and tuned right to have proper sound coming out of them. If a 3D design of an instrument is shaped right, a 3D printer that can accurately reproduce it would make a properly working version, then. Makibox had been working reasonably, provided that I don't push it too far. So I wanted to see if it was up to the challenge. The result is what you see here.

Looks alright, doesn't it? But can it make any sound at all? I'll let you see (and hear) for yourself with this video.


Read on to see the steps taken to make one.

A 3D printer needs a host software that sends various commands for printing. In the case of Makibox, an in-house developed one called 5DPrint does this. It's made as a Chrome web app, which runs on top of the Chrome web browser, and thus supports multiple platforms.

Unfortunately, a recent Chrome update seems to have broken the data communications to the printer, and many users are reporting that 5DPrint no longer recognizes the printer, including myself. Luckily, there are other, more capable host software out there. One of them is Repetier-Host.


As you can see, it has no problems making Makibox work. However, a bit of configuration is necessary. Read on to find out.

It seems that the Makibox 3D printer that I built doesn't have too much movement errors, so I tried printing some small animals, on the request of my daughter Celine. They take around 30 to 60 minutes to print, and look alright. Printing several at a time make some edges rough, though. Read on for a couple of in-production photos.