You’ve no doubt noticed by now that while some links are gold and/or bold, most links out there are blue, especially on web pages of yore. But why? the TL;DR answer is that the Mosaic browser, released in early 1993 used blue links, and since the browser was widely distributed, blue just became the norm. Okay, fine. But why did they choose blue? That’s a question that requires a deep dive into technology through the ages as the Web and personal computing developed in tandem.
It’s important to remember that the idea of hyperlinks predates the invention of color monitors, which thickens the plot a bit. But the pivotal point seems to be Windows 3.1, released April 6th, 1992, when hyperlink blue becomes a navigational and interactive color. A year later, the April 12, 1993 release notes for Mosaic include a bullet that becomes the point of origin for blue hyperlinks:
Changed default anchor representations: blue and single solid underline for unvisited, dark purple and single dashed underline for visited.Mosaic release notes
Around the same time, the Cello browser was developed at Cornell Law, which also used blue hyperlinks. So the blue hyperlink concept was arguably browser-agnostic even before Netscape Navigator and Internet Explorer came along.
The writer speculates that blue was chosen to stand out against black and white once color monitors took over, and that seems legit to us. Can you imagine blue hyperlinks on Hackaday, though? Ouch.
Speaking of important questions in computing history — who invented the mouse?
Lots of solutions have been proposed and enacted for multi-color and multi-material 3D printing, from color mixing in the nozzle to scripts requiring manual filament change. A solution proposed fairly early on was to manually splice the filament together, making a custom spool. The printer would print as normal, but the filament would change color. This worked pretty well, but it was tedious and it wasn’t entirely possible to control where the color change happened on the model.
You’ll find some examples of the more successful manual splicing hacks in the pictures below. Scroll down a bit further to find our interview with Mosaic Manufacturing at Bay Area Maker Faire 2016. They have a new product that automates the filament splicing process with precision as the ultimate goal. It unlocks a single extruder printer to behave like a multi-extruder model without stopping and starting.
Mosaic pulled off a very difficult combination of two methods mentioned above. Their flagship product is a machine they’ve dubbed, “Palette”. It’s an automatic filament splicer. Up to four different filaments can feed into Palette, and it will splice them at determined intervals. This would be cool by itself, if only to save the tedium of splicing and winding a custom spool by hand.
The real killer app with Palette, however, is the software that runs alongside it. Palette can take the GCODE output of any properly prepared multi material file from any slicer, and then precisely combine and splice the filament. This can feed into any printer without modifying it, aside from sticking an encoder somewhere in the filament path. The results are indistinguishable from a dual, or quad extruder set-up.
Continue reading “Mosaic Palette: Single Extruder Multi-Color And Multi-Material 3D Printing”
Hotel art often elicits less than a glance from most patrons. But we have to admit if we came across a piece like this we’d be compelled to record a video for later reference. That’s actually where the video came from, this was spotted in a hotel called Ham Yard.
The concept seemed familiar to us and a bit of Google-fu brings up our previous coverage of the concept back in 2010. The display is made up of circular analog clocks and we’d wager this is a version of “a million times” by Human Since 1982, the same artist who brought us the earlier concept.
Since we’re covering this once again we thought it would be fun to ask: how would you go about building your own? There are several challenges that come to mind. First, notice both hands of the analog clocks appear to be exactly the same (there is no short hour hand). Driving the coils of a cheap clock directly (a la Lord Vetinari clock hacking) seems an obvious approach. But look closely and you’ll see the hands sometimes move in opposite directions. There must be a simple way to implement the control, or are we chasing a pipe dream of a low cost version for our workshop clock?
Here is an interesting project that should spark some good discussion. Artaic is a company that is using industrial robots to produce mosaics. They are then selling these mosaics as fine art. As you can see, some of the examples are quite nice looking. However, we have to wonder what the draw is to own one that is made by a robot. Is it really that much different from just printing an image? We really do think it is a cool project and an efficient way of producing these mosaics. We would really love to see one of those super fast delta robots doing the work.
We’re trying to reduce the negativity here at Hackaday. We are passionate geeks and hackers, and as such, we tend to jump straight to the negative points. We hope you guys will follow along with us and try to be constructive in the comments. That being said, the video did seem a bit pretentious, didn’t it?