I made a change to Arch Equipment
objects in git commit 715fa81fe
, I believe they will now work much better.
Before, Arch equipments could be based on a Part or Mesh object, and if based on a mesh, 3 flat shape views of them could be generated, to be used when projecting plan and section views of that equipment in Drawing or TechDraw. No need to say, this never worked well. Only shape-based ones ever worked correctly.
So now it works like this: Arch Equipments are Part objects, only. They have a shape, like any other, and therefore can be used with any other tool that takes shapes.
But they have a "Mesh" property, which is a PropertyLink, and can link to a Mesh object. They have also a new "Mesh" display mode. When the "Mesh" property is set, switching to the "Mesh" display mode will simply switch the 3D display of the equipment from its shape to the mesh. Magic!
In the picture below, the three objects are the same equipment object cloned two times, some have their display mode as Flat Lines, some as Mesh.
This is only visual, though, internally the object is still a Part object with a shape. Only the coin3D representation changes.
To "calibrate" things, you must place the mesh object at the correct location regarding the base shape that you used to construct the equipment. After that, you can forget about it, move your equipment around, even clone it, the mesh representation will stick to the shape, simply like if it was a hi-resolution version, or as if the shape was a kind of proxy.
When using the Arch OBJ exporter, all equipments whose display mode is set to Mesh, will be exported as the mesh and not as the shape.