tag:blogger.com,1999:blog-12223283.post6884430089274422929..comments2009-02-13T18:56:08.237ZAdrian Bowyerhttp://www.blogger.com/profile/17595509188999219420noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-12223283.post-65655159811643577202008-07-27T22:01:43.978+01:002008-07-27T22:01:43.978+01:00That looks beautifully clean, as always. Brilliant!Adrian Bowyerhttp://www.blogger.com/profile/17595509188999219420noreply@blogger.comtag:blogger.com,1999:blog-12223283.post-10428806084166139972008-07-26T18:29:17.621+01:002008-07-26T18:29:17.621+01:00Great work as usual, Nop. I wait with bated breath to see what the controller system for Darwin you talked about designing looks like.Forrest Higgshttp://www.blogger.com/profile/17208965471464716174noreply@blogger.comtag:blogger.com,1999:blog-12223283.post-1517374636994745582008-07-26T17:15:06.629+01:002008-07-26T17:15:06.629+01:00wade,<BR/>I considered a slot but it uses a bit more plastic (more wall), takes a bit longer to print, and is weaker in the axis where you want it to be solid.<BR/><BR/>The cast blocks are solid PU so less flexible and possibly weren't a tight fit to start with. I imagine this design will work with PCL and HDPE as well. Possibly PLA would need a slot but the movement required is minute as long as you drill with the same drill as your rod diameter.<BR/><BR/>The grub screws I got from BFB grip the rods very well. They have a sharp ring on the end that cuts into the rod.nopheadhttp://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-12223283.post-38039462186021446302008-07-26T15:39:03.764+01:002008-07-26T15:39:03.764+01:00Nophead, what about cutting a slice across the smooth rod hole, such that tightening the threaded rod clamps the smooth rod directly, like the PCB clamps?<BR/><BR/>I ask because I broke one of my cast tie brackets by over tightening; I didn't use grub screw either. I couldn't get it to grip the smooth rod.<BR/><BR/>I'd try this myself, but I still haven't got a usable version of the software running on my Darwin.Wadehttp://www.blogger.com/profile/10975115541719442270noreply@blogger.comtag:blogger.com,1999:blog-12223283.post-63736777699304062412008-07-26T12:30:18.679+01:002008-07-26T12:30:18.679+01:00Yes! This way the amount of parts (and assembly time) could be reduced and thus automatically the proportion of replicable parts increases. Nice.<BR/><BR/>Perhaps one day we will print the diagonals as well out of a couple of parts. They mostly need to resist a pulling force and I think it could be made strong enough. It will also reduce the weight of the already pretty heavy Darwin. You need to have the two plastic parts lock onto itself, perhaps with an adjustable screw in the middle that will tighten it. That way you can have the parts that go in to the corner bracket printed as well (or just use a screw there.<BR/><BR/>I've posted sketches in the forum <BR/><A HREF="http://forums.reprap.org/read.php?14,14915" REL="nofollow">here</A>.Erik de Bruijnhttp://www.blogger.com/profile/09433438819279256757noreply@blogger.com