Problems with high precision prints.. December 20, 2011 02:47AM |
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Re: Problems with high precision prints.. December 20, 2011 11:07AM |
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Re: Problems with high precision prints.. December 21, 2011 03:27AM |
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Re: Problems with high precision prints.. December 21, 2011 03:42AM |
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Re: Problems with high precision prints.. December 21, 2011 06:50AM |
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Re: Problems with high precision prints.. December 21, 2011 07:04AM |
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Re: Problems with high precision prints.. December 21, 2011 09:09AM |
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Re: Problems with high precision prints.. December 21, 2011 09:19AM |
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Re: Problems with high precision prints.. December 21, 2011 11:28AM |
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Re: Problems with high precision prints.. December 21, 2011 03:20PM |
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Re: Problems with high precision prints.. December 21, 2011 04:14PM |
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Re: Problems with high precision prints.. December 21, 2011 05:20PM |
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Re: Problems with high precision prints.. December 21, 2011 07:53PM |
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Re: Problems with high precision prints.. December 22, 2011 02:47AM |
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Re: Problems with high precision prints.. December 22, 2011 03:22AM |
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Re: Problems with high precision prints.. December 22, 2011 12:35PM |
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Re: Problems with high precision prints.. December 23, 2011 11:32AM |
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Re: Problems with high precision prints.. December 24, 2011 01:15PM |
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Re: Problems with high precision prints.. December 25, 2011 06:42AM |
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Re: Problems with high precision prints.. December 25, 2011 04:53PM |
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No they don't they come out as a cylinder defined by the flow rate and the feed rate. The nozzle does not appear in the equation, it only sets the limits of what is possible but that is also plastic dependent.Quote
* to calculate the extrusion width for bridges, since layer height is not enforced in open air and threads come out as cylinders having the same diameter as the nozzle;
I use the maths here: [hydraraptor.blogspot.com] and nozzle diameter does not come into it.Quote
* to choose a good physical model for the extruded threads, since the relationship between the (desired) extrusion width and the nozzle diameter changes the cross-sectional shape of the threads (rectangle with semicircles, rectangle with shrunk arcs, "tear" etc.)
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* to compute an optimal extrusion width (resulting from matching the feed rate and the flow speed rate at the nozzle) so that the user doesn't even have to set a custom extrusion width
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For example, if your equations only consider the balance between incoming and extruded plastic volume, you could say that by increasing the flow rate you could reach any extrusion width, even a very large one. We know from experience that this is not true: with a given combination of factors (including nozzle diameter) you can only get a range of extrusion widths. This is because the physical behavior of extrusion is more complex than just a volume balance.
Re: Problems with high precision prints.. December 26, 2011 07:28AM |
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