tag:blogger.com,1999:blog-1024848558336119865.post4237646299925801912..comments2024-03-20T02:26:18.297-04:00Comments on Sublime Layers: Musings on Under-extrusion - More to think aboutSublimeLayershttp://www.blogger.com/profile/07266175443539080935noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-1024848558336119865.post-53826861868230810902018-01-15T09:59:27.596-05:002018-01-15T09:59:27.596-05:00Haha! Toothpaste! THat very pragmatic, I like it ;...Haha! Toothpaste! THat very pragmatic, I like it ;-)Anonymoushttps://www.blogger.com/profile/08837271047525372170noreply@blogger.comtag:blogger.com,1999:blog-1024848558336119865.post-53096491573114548932017-12-26T13:09:19.976-05:002017-12-26T13:09:19.976-05:00p.s. I updated my profile. previously "unknow...p.s. I updated my profile. previously "unknown" aboveAnonymoushttps://www.blogger.com/profile/06322652835686799209noreply@blogger.comtag:blogger.com,1999:blog-1024848558336119865.post-35463985654076813852017-12-26T13:07:53.461-05:002017-12-26T13:07:53.461-05:00here's a couple videos
https://youtu.be/BYzClT...here's a couple videos<br />https://youtu.be/BYzClTw4kwI<br />https://youtu.be/Sav94CDjM08<br />Its been awhile since I saved a video but I think these were with a 2 mp camera. A 5 mp camera (super eyes) is much sharper. I normally print very small parts with a .1 or .15 nozzle so the camera is a big help to ensure the process looks good early in the print. Soon I plan to increase magnification with better lighting in an attempt to improve video/image quality.Anonymoushttps://www.blogger.com/profile/06322652835686799209noreply@blogger.comtag:blogger.com,1999:blog-1024848558336119865.post-47964200684265494972017-12-26T10:32:10.199-05:002017-12-26T10:32:10.199-05:00That's a cool idea. I have something similar I...That's a cool idea. I have something similar I could try. Thanks!SublimeLayershttps://www.blogger.com/profile/07266175443539080935noreply@blogger.comtag:blogger.com,1999:blog-1024848558336119865.post-29603614662539008702017-12-25T23:17:46.452-05:002017-12-25T23:17:46.452-05:00I mounted a $30 USB endoscope (with magnification)...I mounted a $30 USB endoscope (with magnification) about 15 mm away from the nozzle to watch the process in real time. Great tool but certainly not the tell all end allAnonymoushttps://www.blogger.com/profile/00010336309436694934noreply@blogger.comtag:blogger.com,1999:blog-1024848558336119865.post-72158711407420737152017-12-13T10:35:04.031-05:002017-12-13T10:35:04.031-05:00Thanks, I am familiar with Ryan's excellent wo...Thanks, I am familiar with Ryan's excellent work. And impressed with the cross section photography. So looking at the 02x04 example on the far left, the void appears to be more triangular (slightly curved) on the bottom of the extrusion with very little void on the top for 5-10% under-extrusion. I'll re-run my calculations using this cross-section just for grins.<br /><br /><br />My goal here is to create awareness that FFF 3D printing is remarkably robust to under-extrusion and that stressing over 1% is probably not necessary - the "chasing zeros" comment I made. Ryan's experiment corroborates that and in fact, shows that the part's top surfaces may be much smoother (more completely filled) than my simplistic model shows. Thanks for the comment and link!SublimeLayershttps://www.blogger.com/profile/07266175443539080935noreply@blogger.comtag:blogger.com,1999:blog-1024848558336119865.post-77313801643331892792017-12-13T09:24:16.027-05:002017-12-13T09:24:16.027-05:00The shape depends on the ratio of extrusion width ...The shape depends on the ratio of extrusion width to nozzle diameter. Check some under-extruded cross-section micrographs: https://groups.google.com/d/msg/3dp-ideas/2FG_gUxa_fE/AggVYs-L3p4JAnonymoushttps://www.blogger.com/profile/08675166439804877885noreply@blogger.com