If they are invisible but are included in the scene, they will still be rendered. Note: beware of those objects that are not currently visible in the 3D viewport. Select all objects that you want to add to your scene, then select the created PovProject object, and click on InsertPart. Using perspective view will allow you to see better the type of scene that will be rendered.Ĥ. If the viewport is set as orthographic, change it to perspective, as the renderer will normally work with a camera with perspective view. Create a POV-Ray project by clicking New. Select Add a existing Component or File to the active Assembly and choose the piston.stp file.Deviation property of the bodies created in FreeCAD the deviation needs to be small in order to export the parts with good resolution.ģ. Next we have to add an part from an external file. If the Product does not exist, you can create one choosing Add a new Component. Double click on the Product in the Tree view to activate it. Open the Assembly module and create a new file. Run cmake and enable debug build (FreeCAD may be a little slower but easier for debugging):Ĭompile, the number should be equivalent to the number of threads in your CPU:Įxample 1: an assembly created from external STEP files.Īll parts ( piston, conrod, pin and pinring) was created in FreeCAD and then exported to the STEP files. Switch to the "jriegel/dev-assembly" branch: Now you can list available remote branches: Git clone git://.net/p/free-cad/code free-cad-code Then you can clone the sources from GitHub: Install development packages listed on the FreeCAD wiki. Update: There is more up-to-date GitHub repository /ickby/FreeCAD_constraintĬhange the directory and checkout the "assembly" branch:Īdditional informations in that forum thread. Jriegel/dev-assembly2 is the new data model with the solver * jriegel/dev-assembly-old is the old data model with the working solver of ickby and the new PartDesign of jreinlaender Update : This post is outdated now, the assembly module looks different, and there is no jriegel/dev-assembly branch anymore. Alternatively you can use the dubstar-04's script. Instructions are similar to those provided in the older post. Note: the module is unfinished, unstable and buggy. While assembly tools are not available in the official packages, you can compile FreeCAD yourself with the assembly module enabled. The conrod rotation is calculated using both (Vertex1 and Vertex2) vertices and (0, 1, 0) vector (Y direction): The conrod position is based on the middle vertex (Vertex2, Vertexes): The piston position is based on the top vertex (Vertex1 in my example, Vertexes, because the list is counted starting from 0): You should see the vertex name and position. Simple preselect a vertex and observe the status bar. Now you need to know sketch vertices names. Use to select the first object, in the script:Īpp.ActiveDocument.getObjectsByLabel("Conrod").Placement =Īpp.Placement(p2,App.Rotation(App.Vector(0, 0, 1),conrodangle)) We will use convenient method getObjectsByLabel() Important: the method returns a list (one or several objects), you need only one object. Rename objects to Conrod, Piston and drivingskt respectively. Next, copy last features from the piston and the conrod to the new file - features names are "Fusion" and "Pocket002" respectively. You need conrod and piston files (created during making of older tutorials): getObjectsByLabel("drivingskt").Ĭonrodangle = grees((App.Vector(0, 1, 0),(p1-p2)))Īpp.ActiveDocument.getObjectsByLabel("Piston").Placement = App.Placement(p1t,App.Rotation(App.Vector(0, 1, 0), 90))Īpp.ActiveDocument.getObjectsByLabel("Conrod").Placement = App.Placement(p2,App.Rotation(App.Vector(0, 0, 1),conrodangle)) Self.an = self.an + 0.01 if self.an < (2 * math.pi) else 0.0Īpp.ActiveDocument.getObjectsByLabel("drivingskt").setDatum(5,(str(angle)+' deg')) (self.timer, QtCore.SIGNAL("timeout()"), self.my_update) Import FreeCAD as App, FreeCADGui as Gui, Part, time, sys, math, Draft Open the following file: conrod-piston-anim.fcstd and paste in the FreeCAD Python console: Piston position and conrod position plus rotation are based on the sketch points positions. It does not use the assembly module at all. This is simple sketch-driver piston + conrod animation.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |