Money Pit: 3D Printing Part 1 – The Back Story, The Rationale, and The Assembly

This is one topic in a series of what I’m calling “money pit” projects. To be fair, it’ll be money and time pit topics, and nothing that you’d really have to get a second mortgage on your house to do… but things always get a bit out of hand.

This project is the 3D Printing project. The second part is available at First Round of Enhancements and part 3 should be out within a week. 

The Back Story

It all goes back to five or so years ago, when I bought a couple of Banana Pro single board computers from LeMaker in France.The Banana Pro was a Raspberry Pi-inspired board, but with gigabit Ethernet and external SATA on board. Great idea, but they didn’t sell as much as the RPi, so the accessory market was a lot lighter. I think there were 4 cases I found in the past 5 years, many of which were not readily available in the US.

I did order a few cases from China that had a section for the SATA drive, and stocked up on cables for the SATA drives. But I wasn’t too happy with what was out there.I found some of the 3D printer sites where people had built some cases, and thought “someday I’ll get a printer and make some cases.” I said that about every year for 4 years.

Then earlier this year, some more usable cluster kits came onto the used market from the now-defunct rabb.it startup. By “some,” I mean about a thousand of them. (Click on the photo below if you want to buy one of the kits yourself. It is an eBay partner network link but I have no association with the seller other than as a buyer of one cluster kit so far.)Single Board Computer Array with Intel NUC5PPYH and NVIDIA Jetson TK1They each contain ten NUC5PPYB quad-core pentium NUC machines and five NVIDIA Jetson TK1 dev boards. I pondered it for several months (not as long as the printer), finally bought one, and it showed up a week later. (I’ll write more about that project separately, and you can read my friend Stephen Foskett’s Pack Rat series about the rabb.it clusters here.)

About the same time, I broke down and bought a Creality Ender 3 Pro printer from my local geek shop, Central Computers. Central also stocks the Creality-branded filament for $20 per 1kg roll, and they’re about four miles from home. You can also buy directly from Creality, or choose some sellers on Amazon like SainsmartContinue reading