Production Optimized GCode(2)
时间：2012-08-09 17:05 来源：未知 作者：admin 阅读：次
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After handwriting (modifying) code for pulley production I figured that there must be a way to have Skeinforge output the GCode with whatever you want at the start and end. There is. It's actually really easy too. There are two text documents within the skeinforge_tools folder: one called start.txt and the other end.txt. The carve tool within skeinforge will automatically find those documents and put their contents at the beginning and end of the GCode respectively. A few oddities came up when I was playing around with it: The G1 (move) command used at the end to tell the extruder to move up is a little weird in that it won't do exactly what you tell it to. I think this is because it's trying to linearly interpolate the points you give it. I found the G0 command much better. To my knowledge, the G0 command tells the machine to move to the specified location as quickly as possible. You can designate either absolute or relative positioning with G90 and G91 respectively. The best way to learn GCode I've found is to just look at some examples and do some trial and error. As an example my start and end files look like this: I've left the test extrusion stuff but I have the nozzle return to zero automatically before each build. It's nice because now I rarely have to eyeball the nozzle's height and alignment above the build-platform. I have the extruder first just return to a Z of 10mm so that I don't have to put the platform back right away and so that the nozzle won't be touching the acrylic for too long (I always worry about leaving the hot nozzle on the acrylic). |
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