however it will prevent lines are closing and generating insulated islands. these values within a picture almost same for the human eye. Why these values, because from 0-18 or you can go down to 10. when I say limit you can change pixelvalues as from zero to 18 overwrite to 18 and from 235 to up overwrite to 235. Your issue also that bitmaps used for this purpose 8 or 16 bit.Įither way you need to limit the picture, or modify in photoshop. It made in assembly, because that was that worked on the fastest way. I going to ask them if program exist somewhere yet. The program what one of our friend made a little 40 kb assembly program inputed *.raw fileformat and outputted the necessary vectors. What program you will use that pending on your ""taste"" because what is on the market they already working solutions. but from here, you can let computer works or translate the pixels to a toolpath. That's the reason so many folks looking to working from bitmaps. The issue you encountering, that bitmap is for more human than vectors.Ī simple mes or pointcloud no shading used gives no or little ""feedback"" for human eye. Youre seeing, there are several program will do you try to achieve. The most important you see I try to saying. Those values will make photovcarving or lithopane. You can program each pixel as a drill path. So again, if you go with vectors, vbit will go forth n back in same track.Īnd my guessing, you wont find any program that makes single pass between vectors with vbit. On one side they were connected and after cut vynil we could pull back ((weed)) the vynil in one piece and dark was limited around 235-240 so curves were continuous. Preventing to closing, we limited the light to 18 and up. we simply generated two vector on each pixel row. Making a photo on a white pvc sheet this was the way as you make today with different programs. so we had to find how we can control how much need to open the airbrush on each pixel. Reason why? because we wanted to paint with airbrushes controlled with cnc. I made this in 1997 before anyone see photovcarve or any similar program. I don't want to push you to learn or understand. In each row only one times, no forth n back.Īs I wrote you might don't understand it. for you, whos not a programmer, the simplest is creating a heightmap with a program, and that heightmap leads your vbit. So, your tool need to follow these values.
This practically same when your vbit follow a relief.ĭifference is, with vector you go forth n back on same path, with relief you go on one wayĮach bitmap contain a database where in the file header defined the number of rows and columns.Īfter header you just need to associate each pixel value with a heightvalue. You simply don't see when your v bit follows two vawy vector, and moving up n down you practically follow as the ""color"" changing. I am sure there are justifications for both, but neither is optimal in the time factor. Two completely different calculation techniques. Where RhinoCAM does single direction cut in multiple segments, and when you make the machine lift off and move over it is a time increase.
However for some dumb reason it is omnidirectional cut. Reason I like Aspire (Vcarve) is that it generates very smooth path with no lift offs. Some projects can take 8 hours to cut at this rate. And trust me when cutting several hundreds of thousand lines, 30-60 IPM is a huge advantage over 15-30 IPM. Unfortunately some of the larger images I do (around 4'x4') this method is impractical.
Theoretically if I chose to bevel the vectors down at the angle of my bit, the intersection of the bevel would be my toolpath line. I'm amazed that with how simple the job is, and how difficult it is for the toolpath to be generated. It is still doing single passes and is faster than machining by coordinate system. Unfortunately when the vectors get longer, and more intricate, Rhinocam splits the job into sections causing lift ups in the z axis. Using Rhinocam i can generate single passes through vector halftones done in algorithmic ways, therefore reducing the cut time of my halftones. I can post some pictures of my work later. The whole point of what I am doing is that it is not a 3d image.
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