I’m rather new to Rhino (quite adept with Maya), and I’m having to revisit a project started by a freelancer last year.
I need to create a reproduction of a 3D model with some lasercut board. We did one iteration and it mostly worked, but had two had some critical design flaws (namely a lack of tabs on the bottom to affix it into holes on the flat ground, and the 2D projection did not account for the tilt of the outside permiter (so pieces had to be manually cut off in order to form the cylinder with the top tilted inwards).
My most critical question is in regards to doing the calculations required to determine the exact 2D cut required to match the 3D model, and the workflow for adding tabs in. It looks like the original artist (who I have been trying to get in touch with) drew a curve with etch and cut properties, placed them inside an instance block, and duplicated it along the Z (vertical) axis, then ran a make2D command on that. I’m not very good at match, but i imagine that the exact angle of the taper towards the roof is directly proportional to the overall length of the 2D cut that goes along the permiter.
Any help at all is greatly appreciated - incl regarding how to attach a picture/screenshot to this? link to imgur for now:
Hello - yes, please attach a 3dm file - in general, if the file is large or complex, Export what you’re asking about to a new file and post that. Any details or directions or clarity you can add by using Dot or object color or layers is welcome.
Keep in mind this is a public forum and anyone can get your file.
thanks, here it is. it has the model as well as a make2D that we used (missing tabs to anchor it into the ground plane, as well as the perimeter walls not being the correct length to match up with the roof). 20180722-zendo.3dm (1.1 MB)
yup thats it. one single piece for the roof (etch lines are so it has some give and can fold to support itself).
two pieces for the perimeter wall (because lasercutter bed is not big enough, they are scored as well because they need to flex to join (this is the one that needs to have length adjusted)). this is also the one i would like to add tabs to bottoms of as ‘feet’ to slip through cutouts in baseplate.
and then baseplate (a circle that matches the diameter of the perimeter walls when they are assembled, with holes for the tabs to fit into).
So - the wall is in two pieces, the roof one piece, and the flat panels are, for the moment at least, a red herring; you want a total of three surfaces with tabs on the bottom of the two wall pieces, maybe like so: