digital_rose_engine
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| ====== Digital Rose Engine ====== | ====== Digital Rose Engine ====== | ||
| - | This is a work in progress. I completed the first iteration a couple of years ago, finished some pieces, and then moved on to other things for a while. | + | This is a work in progress. I completed the first iteration a couple of years ago, finished some pieces, and then moved on to other things for a while. Lots more I'd like to do with this though, and I'm always looking for better ideas and input... |
| A little history. This photo shows guilloche enamelwork. It is a technique that probably originated with woodturners and was then famously incorporated into precious metal work by the Russian jeweler Faberge who added clear vitreous enamel coatings and used the technique in many of his famous eggs that were presented to the Russian royal family. | A little history. This photo shows guilloche enamelwork. It is a technique that probably originated with woodturners and was then famously incorporated into precious metal work by the Russian jeweler Faberge who added clear vitreous enamel coatings and used the technique in many of his famous eggs that were presented to the Russian royal family. | ||
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| {{:scribeholder.jpg?100|}} | {{:scribeholder.jpg?100|}} | ||
| - | And the result was that the magic smoke escaped from one of the easydrivers. I upgraded the motors to 127 oz-in Nema 23 format steppers (which eliminated the need for weird adapters to mount them on the frame), moved up to Big Easy Drivers with heat sinks and a cooling fan, and a beefier power supply. And was happy with the first results scratched through black sharpie in copper. | + | And the result was that the magic smoke escaped from one of the easydrivers. I upgraded the motors to 127 oz-in Nema 23 format steppers (which eliminated the need for weird adapters to mount them on the frame), moved up to Big Easy Drivers with heat sinks and a cooling fan, and a beefier power supply. The steppers can microstep at 320 steps per rotation. The rotary table is 72 turns per rotation (so 230,400 steps per turn or 640 steps per degree) and the leadscrews are 20 turns per inch, (64,000 steps). Seems like there is plenty of room to drop the odd step here and there without noticing it in the finished piece, especially as most designs will have a certain amount of progression as the concentric forms step towards the center. I was happy with the first results scratched through black sharpie in copper. |
| {{:firstscratches.jpg?100|}} | {{:firstscratches.jpg?100|}} | ||
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| - | The petals of the flowers are pointed. Not at all what I wanted. Ugh. Math. But as with all math problems (at least the easy ones) once I decided it couldn't be impossible it really wasn't that bad. And it even immediately led to being able to do smooth wiggles, or pointy bits aiming in or out. | + | The petals of the flowers are pointed. Not at all what I wanted. Ugh--math!! But as with all math problems (at least the easy ones) once I decided it couldn't be impossible it really wasn't that bad. And it even immediately led to being able to do smooth wiggles, or pointy bits aiming in or out. |
| {{:cosines.jpg?100|}} | {{:cosines.jpg?100|}} | ||
| - | I used the spring-loaded scribe to scratch a couple of these in silver and enameled them with less ugly results, but I was not happy with these pieces (and in fact earlier this year the enamel cracked off of the one I actually mounted in a setting). The marks were just scratches. Fairly deep scratches admittedly, but a "metal smushed out of the way" groove lacked the reflectiveness of a cut face. And I kept breaking the carbide points off of the tips I was using. This burnished, shiny cut face is, BTW, one reason why you can't really do this kind of work on a router that has a rotating cutting bur or mill. | + | I used the spring-loaded scribe to scratch a couple of these in silver and enameled them with less ugly results, but I was not happy with these pieces (and in fact earlier this year the enamel cracked off of the one I actually mounted in a setting). The marks were just scratches. Fairly deep scratches admittedly, but a "metal smushed out of the way" groove lacked the reflectiveness of a cut face. And I kept breaking the carbide points off of the tips I was using (as in this photo). This burnished, shiny cut face is, BTW, one reason why you can't really do this kind of work on a router that has a rotating cutting bur or mill. |
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| (From arduino projects I've seen I should put a link to the code right around here, but there are some things too ugly even for the internet.) But the machine at this stage looks like this: | (From arduino projects I've seen I should put a link to the code right around here, but there are some things too ugly even for the internet.) But the machine at this stage looks like this: | ||
| - | {{::roseengine.jpg?200|}} | + | {{:roseengine.jpg?200|}} |
| I cut a dozen or so pieces in silver. Enameled them a little better, and set most of them in etched silver or copper "turtle" settings. | I cut a dozen or so pieces in silver. Enameled them a little better, and set most of them in etched silver or copper "turtle" settings. | ||
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| And in silver with dichroic glass. (I bought a selection of these round glass cabs at one of the shows and just recently learned that I actually know Frank, the guy who made them!) | And in silver with dichroic glass. (I bought a selection of these round glass cabs at one of the shows and just recently learned that I actually know Frank, the guy who made them!) | ||
| - | {{::copperdichroic.jpg?100|}} | + | {{:copperdichroic.jpg?100|}} |
| ...and then I moved on to other projects. But Bill has been slowly plugging away at his mechanical version, and I'm back to thinking about this machine and trying to take it further: | ...and then I moved on to other projects. But Bill has been slowly plugging away at his mechanical version, and I'm back to thinking about this machine and trying to take it further: | ||
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| Better holddowns to facilitate larger parts. Mark (at Southern Steel Fabrication) is machining me some plates that I think will hold down the pieces I'm cutting more securely, and also some larger, rectangular clamps. | Better holddowns to facilitate larger parts. Mark (at Southern Steel Fabrication) is machining me some plates that I think will hold down the pieces I'm cutting more securely, and also some larger, rectangular clamps. | ||
| - | Linear patterns. This should be "just a software" project. This is Faberge work again. | + | In some pieces you can just make out tiny ridges where the code switches from radial to rotational steps. Smaller step increments should fix this and give a smoother wall to the cut. |
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| + | Linear patterns. This should be "just a software" project. This is Faberge work again: | ||
| {{:linearwork.jpg?100|}} | {{:linearwork.jpg?100|}} | ||
digital_rose_engine.txt · Last modified: 2017/01/14 22:35 by 74.243.171.60
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