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Two Material Extrusion Design Problems


AcuteAngle
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Posted · Two Material Extrusion Design Problems

Ok, we have been printing two paste materials with the Ultimaker 2 now for a while, however we are still finding issues with the offset between the two nozzles. To solve this I designed an adapter that allows for two materials to flow out of one nozzle. However, this adapter uses a "door" type valve that closes off one path when the other is printing, and vice versa. This door style valve is so small that I can't print it on conventional printers, as it just comes out as mush. So, does anyone have any ideas as to how to fix this? Or should I just redesign it to allow it to be printable?

And, once this is solved I will still have the problem of adjusting the flowrate of each material individually so that I can push through which ever material I want to without leakage. Is there a way to change the flow rate during each individual layer in the gcode?

5a330f8f581ac_ExtruderHolder.thumb.jpg.23447fd8db735fb7a5495c82c165f9a8.jpg[/media]

5a330f8f74e51_ExtruderHolder2.thumb.jpg.990792bf0062337e507de3acd938d054.jpg

5a330f8fad35c_Extruder3.thumb.jpg.501b3b724f841d587e6bc260d52aa9b5.jpg

5a330f8fcbda3_ExtruderHolder4.thumb.jpg.105f2525b0abc074b0ea3d039ad3657e.jpg

5a330f8fe2e78_ExtruderHolder5.thumb.jpg.161b0cfd654748d4c7e7fe7a949b78ef.jpg

The "axle" of the door valve has a 1.5 mm diameter, and is too small to print with any sort of form.

If anyone can help me improve on the design, I would be very appreciative!

5a330f8f581ac_ExtruderHolder.thumb.jpg.23447fd8db735fb7a5495c82c165f9a8.jpg

5a330f8f74e51_ExtruderHolder2.thumb.jpg.990792bf0062337e507de3acd938d054.jpg

5a330f8fad35c_Extruder3.thumb.jpg.501b3b724f841d587e6bc260d52aa9b5.jpg

5a330f8fcbda3_ExtruderHolder4.thumb.jpg.105f2525b0abc074b0ea3d039ad3657e.jpg

5a330f8fe2e78_ExtruderHolder5.thumb.jpg.161b0cfd654748d4c7e7fe7a949b78ef.jpg

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