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James Rivera
Works at Holly Zhang Pearl Gallery
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James Rivera

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It seems the geometry of the part is mostly how they did it.
Porous, 3-D forms of graphene developed at MIT can be 10 times as strong as steel but much lighter.
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James Rivera

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Next up, a library of circuits stored as text? Yes please!
 
SKiDL is very, very cool. It’s a bit of Python code that outputs a circuit netlist for KiCAD. Why is this cool? If you design a PCB in KiCAD, you go through three steps: draw the schematic, assign footprints to the symbolic parts, and then place them. The…
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James Rivera

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My Re-Arm just arrived!! :-)
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Oh, fun! 
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James Rivera

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There are some good tips here.
 
At this point, the internet is crawling with butt-kicking homebrew 3D printers made with extruded profiles, but it’s easy to underestimate the difficulty in getting there. Sure, most vendors sell a suite of interlocking connectors, but how well do these…
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James Rivera

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I have more important stuff to do than go back and forth to the store. Hot snot to the rescue! :)
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James Rivera

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Washer water pump failed and left a bunch of water in the tub. A good excuse to buy a wet/dry shop vacuum I've been wanting to buy anyway for use with my CNC router. #TurningALossIntoAWin
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James Rivera

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Interesting.

REPORT TO THE PRESIDENT
Ensuring Long-Term U.S.
Leadership in Semiconductors
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James Rivera

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Hey +MeshLab, installing this latest release has co-opted my previously pinned Windows 10 command prompt to always start in the MeshLab directory (C:\Program Files\VCG\MeshLab), and changed the name, "Meshlab Server". So, I unpinned it. Then I opened Windows Explorer to "C:\Windows\System32" and right-clicked to pin "cmd.exe" to start, and it STILL has this behavior (it says "MeshLabServer", etc.). Fortunately, Start->Run-> and type "cmd" <enter> still works properly and opens in my user directory, but this is an odd bug.
EDIT: Uninstalled, and it STILL does this!! WTF???
MeshLab 2016 Released 23/12/2016. After a very long time, a huge rewriting process, and a strongly renewed effort the new MeshLab version is finally out! Total rewriting of the internal rendering system. Huge rendering speed ahead! Screened Poisson Surface Reconstruction updated to the very ...
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Uninstall leaves the the installation directory and the command prompt shortcut it created. Deleting those (finally) solved the problem. Not sure if I should be mad at MeshLab or Windows 10...
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James Rivera

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+Rob Walsh what do you think of this open source resin 3D printer?
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Wow, really detailed. And I hadn't thought about fume / cleanup issues from the resin itself. Sounds like they're a fair amount more work for that.

Thanks for sharing! Enlightening (if a bit daunting). :-)
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James Rivera

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Just downloaded current OctoPi, 0.13. Perhaps just a typo or just needs to be updated, but the MD5 hash on the download page does not match the MD5 hash Win32 Disk Imager calculated. I've downloaded on 2 different PCs and checked the MD5 hash on each. No match.
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I wonder if it'd be handy to also include the hash of the image itself, just to make sure the zip archiver unarchived it properly. 
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James Rivera

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LOL! I have an old Mr. Coffee lying around collecting dust. Hmmm...

https://hackaday.io/project/11346-coffee-maker-delta-3d-printer
There are many DIY 3D printer designs available on the internet. While there are dozens of designs out there, almost all of them require precision rails/bearings. Most printers require two precision rails and at least three linear bearings per axis, for a total of 6 rails and 9-12 bearings. Even so called “delta” printers tend to actually be linear-delta machines, requiring just as many rails/bearings. It’s these precision components that rea...
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James Rivera

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Quality control at Central Machinery is clearly not a priority. :(
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Work
Occupation
Owner and CIO for a bricks+clicks jewelry retailer
Skills
Software development, information management, and business management. Also basic skills in 3D printing, CAD, and electronics.
Employment
  • Holly Zhang Pearl Gallery
    Owner/CIO, 2011 - present
    Co-owner with namesake. I handle all programming for the website and email systems, point of sale, marketing media creation, and accounting data entry (we use a CPA for the rest). I am also heavily involved in all business and hiring decisions.
  • Microsoft Corporation
    SDET II, 1996 - 2011
    Worked on Exchange Server 5.0, Outlook 98, Outlook 2000, Programmability in OfficeXP, Excel 2003, Access 2007, Access 2010. Left during development of Access 2013 to form my own company. I was responsible for creating test plans and writing software to test the features I owned in the shipping software. I also independently wrote an Excel Add-In for creating mapped XML from an existing spreadsheet data range that allowed subesquent export and import of XML data following the same XML schema.
  • ON Technology
    SDE, 1994 - 1996
    I wrote the cross-platform (Win16, Win32, Unix, and Mac) licensing library for several of ON's products (e.g. Da Vinci eMail).
  • Da Vinci Systems
    Software Tester, 1993 - 1994
    I worked in tech support and then testing of Da Vinci eMail, the premier Netware MHS email software client at the time.
Links
Contributor to
Story
Tagline
Software Engineer turned business owner, and 3D printing hacker
Introduction
For the last 4+ years now I have co-owned a small business.  Before that, I worked at Microsoft (for almost 15 years) as a Software Design Engineer, mostly in Office Test. Prior to that, I worked at a small email software company (I wrote their licensing software).

I love learning new things and must admit I have been totally obsessed with 3D printing for over 3 years now.  I have 2 Printrbots (one PB+ v1 w/Super-Z, and one PB+ v2.1 with some self-sourced/homebrew parts). Programming used to be my hobby (it still is) and I turned it into a career. Will the same thing happen to me with 3D printing? Time will tell...
Bragging rights
I discovered there is life after Microsoft
Basic Information
Gender
Male