E3d V6 Fan Dust
thingiverse
Just another fan dust. http://copytime.org/posts/179 bridge speed 15-20 mm/s could gain better print result UPDATE 这个设计对打印质量并没有什么有效的提升，特别是打印大面积时会因为顶部冷却过快而让边角更容易翘起，所以打印大面积物品时最好把 cooling fan 关掉。。。
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