Money Pit: A quick sidebar on my 3D printing (mis-)adventure

You’ve seen the first two parts of my 3D printing series, and I promised part three in the near future.

I decided to postpone the third part a little bit, in order to share a cautionary tale and some printer gore with you. I’m hoping this will be a one-time error, but if you’re like me, you might not think it’s so bad until it shuts down your printing operation for a week or two and potentially costs you $30+ in replacement parts.

First, the gore

Second, the TLDR

(tl;dr means too long;didn’t read. However, I hope you’ll read on.)

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Money Pit: 3D Printing Part 2 – First Round of Enhancements

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. Expect it to be an ongoing series, and I’m hoping to have some friends join the effort and offer their feedback as well.

See the previous part (The Back Story, The Rationale, and The Assembly) for the lead-in to this project. From here we’ll get into the enhancements and early printing.

Our first round of enhancements include:

  • Power protection
  • Metal extruder and printed filament guide
  • PEI print bed
  • Upgraded Bowden tubing

I mentioned OctoPi / OctoPrint in the first installment, so I’ll leave the details out this time other than to say you really should set one of these up. Let me know in the comments if you’d like more details in a future post. 

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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