On Tuesday 04 April 2017 12:55:10 Ralph Stirling wrote: > I believe you can use SketchUp for generating STL files > for 3d printing. Pretty much any 3d cad tool in existence > can do so. Librecad is only 2d, so not much use. On Linux, > you are pretty well limited to Openscad and Freecad. > > -- Ralph
But while freecad is in the wheezy repo's. selecting it breaks synaptic and aptitude, with neither bothering to explain whats broken. So I am intermittently poking at openscad's tires but despite looking at the examples of the text file input vs the relatively poor video rendition it offers when that text file is compiled, I have so far not even spy'd the light at the other end of the tunnel. So I printed what I could get from wikibooks, and will see if anything can be learned from them. But at 75 pages, I expect its pretty sparse for a new bee like me. Tomorrows project unless I see about hauling my tax stuff to the local Block office. I'd better do that, and get done with it so I can get sidetracked in it for a few days to see if osmosis might help. ;-) > ________________________________________ > From: Gene Heskett [ghesk...@shentel.net] > Sent: Tuesday, April 4, 2017 9:29 AM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Cast Bracket for FHA-25 Harmonic Actuator. > > On Tuesday 04 April 2017 06:04:50 Erik Christiansen wrote: > > On 04.04.17 05:00, Gene Heskett wrote: > > > On Tuesday 04 April 2017 02:51:22 Gregg Eshelman wrote: > > > > I wonder if they've heard about lost PLA casting? One off and > > > > short runs without needing to make expensive, reusable patterns, > > > > plus the ability to do casting shapes impossible with patterns > > > > that must be removable from a sand mold, could be a money maker > > > > for the foundry. 'Course they'd have to get and learn to use a > > > > 3D printing setup. > > > > > > That looks like something I could do, if I had a big enough > > > printer and could learn how to do the 3d model to feed the slicer > > > software for the printer. I'm thinking of the belt guards in > > > particular which would need at least one dimension in the 250mm by > > > 100 by 100 range. > > > > Much much easier (and faster) for a relatively simple L-shaped angle > > bracket with webs is lost polystyrene foam. For best finish, a > > hot-wire cutter is a quite simple tool to make and use. (For the big > > central cut-out, scribe the circle in pen, or pin on a cardboard > > template, and cut radially to that circumference. Once around, exit > > by the same radial cut. A little PVA glue seals that up again.) The > > foot of the L, and webs, are similarly attached with a little PVA > > glue. > > > > In extremis, lacking a hot-wire cutter, the only slicers needed are > > a pointy breadknife to hack out the hole in the middle, and a sharp > > box knife or similar to slice out the rectangle, triangles, and > > external radius. Cold cutting works better (finish-wise) on that > > fine blue "Styrofoam", sold by Dow as "Blue Ribbon Insulation > > Boards" or "Wallmate". > > > > Do you have any offcuts remaining from lining the garage door, Gene? > > You could have the pattern done in a day - for nix. > > > > Erik > > Those scraps of that blueish foam have all been binned or used years > ago. And Lowes no longer carries that same board in 2" R22 thickness. > The current product the last time I looked is a white, larger cell > product and only about R20 because of that, but its the same $35 & tax > a 4x8 foot sheet. How it would cut with a hot wire would be TBD. > > The composition SW you folks use is I assume OpenScad? I started to do > a belt cover with librecad, and had made good progress with a wire > outline of unk dimensions but found its 2d only when I went looking > for an extrude function. Dropped that, installed openscad, but the > only place I can find docs is at wikibooks. Without downloading both > books from there, I've no clue how many pages of dead tree that would > be. > > librecad apparently does not have any docs, there are none in the > installed librecad, and clicking of the help button gets an oh fudge, > I can't find the docs message. Theres not a separate docs package in > the repo's for wheezy. But its pretty intuitive to draw outlines and > such. > > So openscad seems to be it if I make a full 3d model, mounting tabs > and all. Its help docs buttons go straight to wikibooks. > > How hot does the hot wire need to be? Seeing as how thats best > jiggered up as a wire support frame I could stick in a vise on the > g0704's table and rig some sort of a sheet gripper leaving a cutaway, > for the hot wire to move within, attached to the chip pan, if I get it > rigid enough to keep its place as the wire moves, I could probably > just write gcode to drive the cutters path. Where it needs a lid like > the outside face of a belt cover, just cut the outline out and glue it > on. > > But, I think buying the printer would get me a nicer looking belt > cover. > > Have any of you bought an open frame big enough to use, then built an > insulating box to make it run smoother and faster? Best deal for the > dollar but with a pellet fed head, that and working envelope big > enough for a 10x5x4 length.width,height, or 250x125x100 in mm's. > > Throw some brand names I can google for at me please. > > > -------------------------------------------------------------------- > >-- -------- Check out the vibrant tech community on one of the > > world's most engaging tech sites, Slashdot.org! > > http://sdm.link/slashdot > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > Genes Web page <http://geneslinuxbox.net:6309/gene> > > ---------------------------------------------------------------------- >-------- Check out the vibrant tech community on one of the world's > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ---------------------------------------------------------------------- >-------- Check out the vibrant tech community on one of the world's > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
