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Lab talk, the good, the bad, and the ugly
3D Printer
So Im testing out a new printer...
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<blockquote data-quote="CoolHandLuke" data-source="post: 313408" data-attributes="member: 4850"><p>Well, easiest method is to make known geometry. Print a cube or a pyramid. Measure with precision instrument. If the cube is smaller than it should be according to the stl file, blow up the stl file accorsing to the ratio of the size difference; if your cube should be 10mm wide but is actuallly 9.2 then the amount it shrank was 0.8mm expressed as a % of the total dimension, that is 8%. So your shrinkage is 8%, meaning you should blow up your parts by 108% to get a part that is closer to complete accuracy. </p><p></p><p>In almost all 3d print and cnc software there is shrinkage accounting baked in to the material setting. Eg in the 3dsprint software each material has build shrinkage accounting. As it will be with virtually all 3d printers. </p><p></p><p>The issue is that with many laser or light printers, the accuracy of the head begins at the center of the build plate and gets worse the further from the center you go. A die or crown printed near the center will have different fit and finish than identixal objects printed near the edge. This is common in all resin printers even dlp. </p><p></p><p>Asiga hides this by creating a proprietary calibration object that is as big as the whole plate.</p></blockquote><p></p>
[QUOTE="CoolHandLuke, post: 313408, member: 4850"] Well, easiest method is to make known geometry. Print a cube or a pyramid. Measure with precision instrument. If the cube is smaller than it should be according to the stl file, blow up the stl file accorsing to the ratio of the size difference; if your cube should be 10mm wide but is actuallly 9.2 then the amount it shrank was 0.8mm expressed as a % of the total dimension, that is 8%. So your shrinkage is 8%, meaning you should blow up your parts by 108% to get a part that is closer to complete accuracy. In almost all 3d print and cnc software there is shrinkage accounting baked in to the material setting. Eg in the 3dsprint software each material has build shrinkage accounting. As it will be with virtually all 3d printers. The issue is that with many laser or light printers, the accuracy of the head begins at the center of the build plate and gets worse the further from the center you go. A die or crown printed near the center will have different fit and finish than identixal objects printed near the edge. This is common in all resin printers even dlp. Asiga hides this by creating a proprietary calibration object that is as big as the whole plate. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
3D Printer
So Im testing out a new printer...
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