Obviously valve diameter is related to valve/valve clearance. FreeCAD is a general-purpose parametric 3D computer-aided design (CAD) modeler and a building information modeling (BIM) software application with finite. xls showing lift vs cam degrees rotation. FreeCAD CAM Part for machining 6,619 views 30 Dislike Share Save CAD CAM Lessons 3.76K subscribers In this video we will prepare part for FreeCAD Path Workbench Tutorial. I can provide a dxf file of the valves,rocker and pushrod in position for import as well as sample cam data in. The valves are linked to a simple pushrod and rocker mechanism which is driven by the cam/s. This free CAD CAM software is designed for creating 3D parametric models and has some great features to help you do just that. While it may be free, it’s a very high quality software that’s ideal for hobbyists and professionals alike. The objective is to vary the cam data (lift and phasing) and determine the valve to valve separation at the head ( the 'penny') as the valves reach their closest separation. FreeCAD is completely open source CAD and CAM software that’s free to all users. The cam data may be the same or different for each valve. The cam lift data determines the valve duration and lift. It consists of two 'penny on a stick' valves at 80 dgrees and cam lift data in a spreadsheet.

To start, the modelling only needs to be 2D. I recently installed FreeCAD to model a simple cam (valve train) mechanism but have decided that the learning curve is too steep for me and therefore would rather pay a experienced FreeCad user to do the work.

Freecad cam