mitre joint

 From: Rudl 17 Sep 2012  (1 of 13)
 I am looking for a simple solution to make a mitre joint between three spatial profiles. Have attached an example. Rudl Attachments:

 From: Frenchy Pilou (PILOU) 17 Sep 2012  (2 of 13)
 5407.2 In reply to 5407.1 Just take 2 piece Boolean Union (more prudent) Then Last piece with this new piece Boolean Union :) But how this crazzy unity and measure ? there is a lot of décimal :) But I am perplex about a joint "Mitre"? have you an example ? It's a trim ? Tenon + Mortise ? As pieces are symmetric You have interest to take small pieces then make an extrude when you have finished ;) So very more easy to manipulate! EDITED: 17 Sep 2012 by PILOU

 From: Rudl 17 Sep 2012  (3 of 13)
 5407.3 In reply to 5407.2 Hi French, > But I am perplex about a joint "Mitre"? have you an example ? It's a trim ? When you want to make a frame for a picture, you need four profiles with 45° on the end. Don´t know if "mitre joint" is the right word, I translated it from German. So to build up the example in reality, I need the mitres between the profiles. Why are the measures crazy?

 From: Frenchy Pilou (PILOU) 17 Sep 2012  (4 of 13)
 5407.4 In reply to 5407.3 I have something like that for the bounding box :) 2.1545423 3.8440301 1.3128264 So after you want cylinder, trapeze, rectangle, round form... as Tenons mortises ? Flat + Glue ? Other clumping ? What is the size of that ? in meters ;) Wood, aluminium ...? EDITED: 17 Sep 2012 by PILOU

 From: Rudl 17 Sep 2012  (5 of 13)
 5407.5 In reply to 5407.4 @ Frenchy: I have made an irregular geodesic dome with just a few flats. What you see are the rafters of a part of the dome, already cutted from the hull. May be, I have made a mistake, when I shelled it with TC, because I can remember I´ve read inch in the imported file, but I made a shell of 10 and in MOI I have decimal again. Don´t know. But the proportions look for good. I will make it with wood.

 From: Michael Gibson 17 Sep 2012  (6 of 13)
 5407.6 In reply to 5407.1 Hi Rudl, there is a mitering mechanism in MoI in Sweep, it's when you do a sweep of a profile around a one-rail path like so: However, it's meant to be used on a regular path curve where there is at most 2 segments joining together at any single common juncture. The way that sweep mitering works is by generating a longer extended piece which then has its ends trimmed off by a miter plane created at the juncture area. For your case you could either do that same kind of approach that sweep takes internally where you would build a larger extende piece and then trim it to a common cutting plane and then join the pieces together, or possibly you could use the mitered sweep on your 3 branched one if you did half of a profile at a time and did 3 different paths. - Michael Attachments:

 From: Michael Gibson 17 Sep 2012  (7 of 13)
 5407.7 In reply to 5407.6 Attached here is an example for doing 1/3 of your shape by a sweep - note I've slightly modified your shape here so don't use it directly. But here you can see 2 lines joined for the path, and then the profile is 1/2 of your end shapes. You can select that profile then run Construct > Sweep, select the 2-line path for the rail and that will generate I think 1/3 of the shape that you want, then you need similar things set up for the other 3 zones and then you can boolean union the results together. Note that the sweep profile should be perpendicular to the line path, not slanted - the ends of your original shape are slanted, you would probably introduce the slant later on by slicing off the ends. - Michael

 From: Frenchy Pilou (PILOU) 17 Sep 2012  (8 of 13)

 From: Michael Gibson 17 Sep 2012  (9 of 13)
 5407.9 In reply to 5407.6 Also a quick note that may help you with some of the constructions that you're doing - if you make 2 construction lines cross each other at a single point there will be a "normal" snap for the line that is perpendicular to both of them. So for example 2 lines like this that are not flat to any world plane: Start the line command and drag 2 construction lines each of which starts at that end and goes tangent to those lines: Then you can place the first point onto that same spot, and for the second point there will be a "normal" snap at the shared perpendicular: That may help you in some situations to get some element drawn where you need it for building a cutting plane or whatever, without needing to set a cplane for that situation. - Michael

 From: Frenchy Pilou (PILOU) 17 Sep 2012  (10 of 13)
 here the clumping of 3 pieces on a flat plane Clumping at half Will be the same process with the inclined beams ;) jags of course will be different and little more complex but easy to make like these one :) Does this resist to the compression...rotating ejection...shearing...Twisting ...??? Easy to trim in reality ? :) And you can put a little connector (the circular piece) top an bottom for solidify ;) EDITED: 17 Sep 2012 by PILOU