Possible problem of cutting into the filament and or gumming up the drive shaft. Possibly use the drive shaft as the filament drive gear itself, if the right shape and size. (might not be a perfect quote)įrom sparr, Replacing the lower support rod with the drive shaft so as to reduce parts needed, the potential problems with this is if the rotation binding on the carriage if there is any slack, but this could be solved with rollers in the filament drive gear or by using ball splines again but they would need to be homemade.įrom peeps, make sure to keep the filament drive gear as small as possible in order to maintain mechanical advantage. These are CAD files for the total OpenScad model.ĭfk20012002 13:48, 17 November 2011 (UTC)Ī shaft driven extruder with a worm gear drive built with public available parts.Īs I talk with people on the IRC there have been several ideas come up and any name mentions is just a general direction where the idea came from. One proposed method of creating them is via a router or dremel tool in a channel cutting groves into a shaft for a cheap replacement, This has not yet been attempted. While there are a multitude of drive shafts out there these are just some of them.īall splines: though the most accurate and best for linear motion as well as rotation are ludicrous in price costing $100+ per 12inchs and the take off gear is about $80 As such by having a shaft driven extruder you wold not have the same problemsĮxamples of different drive shaft profiles that are available The Premise about this is to reduce the amount of weight on the extruder, a previous approach was to use Bowden cable extruders however some of the claims are that it is unresponsive and elastic in comparison to a traditional extruder. Increased complexity for single extruder.Might get quickly bogged down if too many heads.Interchangeable Hotends become feasible.Maintains high degree of control at extruder.Multiple heads can be driven by the same motor.Threads of z axis (hard to verify this claim) Possible better distribution of wear on. Frees space near hotend for other goodies.If this happens, select Design | Flush Caches and then Design | Reload and Compile.Rough Example of a Spline Extruder Pros and Cons Design OpenSCAD doesn't always provide information about the issues it encountered with a DXF import. Although EXDXF provides you with numerous options when exporting to DXF the most important option for OpenSCAD compliance is to set Line Conversion to Line and Arc. Since pstoedit does not natively support Adobe Illustrator files, one alternative is to use EXDXF, which is an Adobe Illustrator plug-in (30 free trial exports and then you have to pay $90 to register the plugin).īefore exporting, it is recommended that you ensure that your Artboard is the same dimensions as the component you are exporting. Ln -s /path/to/this/svg_to_dxf_makefile makefileĪI (Adobe Illustrator) Īlthough Adobe Illustrator CC/CC.2014 allows you to export illustrations as DXF (and select DXF format versions as early as 12), it uses DXF entities that are not supported by OpenSCAD, such as POLYLINE and SPLINE. The conversion can be automated using the make system put the following lines in your Makefile: Pstoedit -dt -f dxf:-polyaslines\ -mm intermediate.eps outfile.dxf Then pstoedit can convert the EPS to DXF. Pstoedit -dt -f "dxf: -polyaslines -mm" infile.eps outfile.dxf (If the rendered text's resolution in terms of polygon count is too low, the easiest solution is to scale up the eps before converting if you know a more elegant solution, please add it to the example.) The -dt options instructs pstoedit to render texts, which is usually what you want if you include text. The -mm option sets one mm to be one unit in the dxf include this if you use one unit in OpenSCAD as equal to one millimeter. OpenSCAD needs the -polyaslines option passed to the dxf output plugin to understand the file. The pstoedit program can convert between various vector graphics formats. Other common formats are PS/ EPS, SVG and AI. Currently, OpenSCAD supports DXF only as a graphics format for 2D graphics.
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