Blognasium

An Exercise In Comunications

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3D Printing Small Items

I have thought of using 3D printing to produce jewelry and various molded items. Not using the printed item for the final creation but for use as masters in a casting process. This includes high quality lost wax casting as well as rubber mold resin casting or any kind of pour-in material casting. All my 3D printing to date has been to produce the product, without finish other than gluing assemblies together. WYSIWYG in a 3D print sort of way. The FDM or filament type 3D prints produce a surface finish that needs considerable finishing to get to a true smooth finish. I honestly haven’t exerted any effort in refining FDM print to produce a smooth surface finish. Nothing I make with 3D printing has required a perfectly smooth finish. The refinement process requires a filler primer followed by finish sanding. The item can then be painted and used as...
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Great 3D Printing at the Low End. It Can Be Done.

I decided why I like the Cetus printer so well. It is made the way I would have done it. Good, accurate components in a simple arrangement. It runs very smooth and produces great printing results. It fulfills its purpose. The limit is that it is a PLA printer. Nothing wrong in trying other printing materials, but certain details like a single fan on the print head and an unheated print bed are limiting options. There is nothing wrong with experimenting as I myself found I could run PETG with satisfactory results. I can’t say all PETG will work. I would like to option to directly use other software, so I could have more control over printing parameters. You can feed a G-code file into the machine and it will run certain codes. That is not the same as running directly off S3D (SImplity3D), Cura, or other programs of interest....
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PETG Printing

My Linux computer I call “Sandbox” lost its power supply. One day working fine, the next day dead. Better sandbox than me I suppose. The most serious problem is that sandbox serves my two older 3D printers. Not only no computer, but also no printing from those printers. I have a new power supply ordered and it was shipped on Monday. Maybe by the end of the week I will be back on-line. I have been experimenting with some new 3D printing filament. It is PETG ( Polyethylene Terephthalateco-1, 4-cylclohexylenedimethylene terephthalate ). Yeah,right… I’ll call it PETG, The G is for Glycol, which helps make it a bit softer and prints better. With sandbox down, waiting for its PS, I have been using the PETG in the Cetus printer. It has been printing very well with the transparent colors. The solid colors did not do well. The Cetus has only...
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Scratch Building 3D Not Required

I last posted how I could build a better mousetrap (3D printer). Now I don’t have to. I purchased a machine that is very close to what I would have built from scratch. It is the Cetus 3D. It is a Chinese product. I have no issue with the world market. It is what it is. No USA company can afford to be in this niche market with the quality and at the price point of the Cetus. I doubt I could scratch build the equivalent for less money.  There is nothing low cost about scratch building high quality. The personal labor is also not considered as a cost factor. If I ever need a larger capacity 3D printer (not in my plans), I will consider the home brew idea again. It’s the only way to get exactly what I need without all the marketing and proprietary design limitations. The...
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Scratch-built 3D Printer?

I have been running my 3D printers for almost a year. I have printed/created a huge amount of plastic "thingies". My printers are among the lowest cost available and represent the two major forms of fused filament printers. The oldest is a Cartesian, square based X, Y, Z, format and the newer is a Delta. Polar style round base with the Z axis divided into the three (delta) vertical moving corner carriages. It uses X,Y, Z, Cartesian coordinates but converts then to the Delta action. Both styles can do good quality printing. I have used them enough to discover their weaknesses. Neither are perfect, but then, what is? They both could be improved. I have given some thought to the fact I could build a custom 3D printer of my own design. The project is completely within my abilities and shop (machine tool) equipment. I know what needs to be...
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ramblindan
I found a tiny 3D printer that fits the description. It's the Cetus 3D printer. It's very small so won't crowd out my other printe... Read More
Sunday, 15 October 2017 20:46
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Such A Lonely but Lovely Blog

I invited a few friends to come here and check out this website. I was asking for their opinions. It’s been quite a while ago. Don’t know why they haven’t. They are not computer nerds like me, so an empty community website doesn’t draw their interest. No content is a very good reason. Ha! It’s going to get lonelier for me as I have abandoned Facebook. A virus or Trojan ransomware popped up on my computer yesterday while I was browsing Facebook.  It claimed to have locked all my files and computer. That was the last straw. “ I could stands no more ”, as Popeye used to say. I posted what happened on my Ramblin’ Dan blog . I will hang out a little bit more here on Blognasium. With almost no one visiting, it is still a useful personal archive for storing family photos. I am connected to...
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Double Duty

This is the same blog software I use for the blog in RD's workshop . I's a purchased program but I am permitted to install as many times as I desire. This is the newest version. I have been using it (earlier versions) for at least five years, maybe longer. Very good blog software and works within the Joomla CMS structure. In this location It is open for anyone to register and start their own blog. Probably not going to happen anytime soon. I realize Bognasium is rather obscure. Doesn't bother me, but I would like to eventually see other users get involved. I bought it for the RD Workshop and this is a free secondary use of the software. The same goes for the discussion area. I am evaluating that for use with my eCommerce sites. It is a good system to communicate with my customers. I use one-on-one...
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Security

One of the big issues faced on the Internet is security. There are many variations of privacy invasion. Most actions are invisible and the only evidence is after it happens. So the defense has to be pro-active. Passwords are the first line of defense. The hacker assumes the identity of the victim using stolen (acquired) or guessed passwords. Then has full access, the same as the victim. Unless the hacker is at the computer or has installed software on your computer to monitor your keystrokes, he would have to be monitoring somewhere in the middle of the communications route. Since a path may use dozens of computer links, the hacker can be the owner of any one of them. This is called “The man in the middle” hacking. The defense for that is to use encryption to encode all transmissions. This is what HTTPS does. Here at Blognasium, we have...
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Drawing in Three Dimensions

My creative interest is with three-dimensional art, turned into three-dimensional tangible items. This includes my lost wax silver casting (jewelry) using CNC for wax carving, decorative dimensional wood carving using a CNC overhead router, and three-dimensional printing (another CNC process) using the fused filament process. These require the use of a computer to develop the three-dimensional image. The image is then used to produce the computer code that drives the CNC machines. Initial hand sketches establish the general idea but the most effort goes into the detailed drawings made on the computer. The art for CNC is all digital. I have several programs I use to create the drawings. Rhinoceros / RhinoCAM is a powerful drawing, drafting and CNC tool I have used for many years. My second strong resource is Vectric Aspire . Recently I have been experimenting with Autodesk FUSION 360 . Fusion 360 is free for non-commercial...
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Blognasium Blog is Now Open!

The blog section for Blognasium is functional. It appears to be working fine. This is the first post of what I expect to be many more. Thanks for taking a look. This blog is open for use by all registered and approved bloggers. If you have an urge to post a public diary of your thoughts, this is one place to do so. Please, at least,  post a comment and let me know you were here! :) (Click on title if you don't see the comments section.)  
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