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DeepSOIC / Lattice2

FreeCAD workbench about arrays of all sorts and kinds, and local coordinate systems
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Z-Placement in PolarArray #41

Closed leoheck closed 4 years ago

leoheck commented 4 years ago

I am changing the Z placement of a PolarArray feature but it keeps resetting it to 0. Is it right?

The features are not being generated too (maybe because of the wrong z-placement). So, I am adding z=18, for instance, but after the refresh, it will be moved to z=0 again.

Am I doing something wrong or this is a bug?

The base feature is the small whitish trapezoidal form (top-left) image

Current settings are these. image

DeepSOIC commented 4 years ago

I am changing the Z placement of a PolarArray feature but it keeps resetting it to 0. Is it right?

If the array is attached, and you are changing Placement's Z (not AttachmentOffset Z) - yes. But the fact that it's not grayed out is a bug.

DeepSOIC commented 4 years ago

The features are not being generated too

can you share a file, please? I can't guess what's wrong here

leoheck commented 4 years ago

Sure, here it is (but I think you already saw it in Freecad Forum) lattice_polar_array.zip

I was not using the latest version of Lattice2, now I am using, and I am seeing this

Traceback (most recent call last):
  File "/home/lheck/.FreeCAD/Mod/lattice2/lattice2BaseFeature.py", line 148, in execute
    plms = self.derivedExecute(obj)
  File "/home/lheck/.FreeCAD/Mod/lattice2/lattice2PolarArray2.py", line 119, in derivedExecute
    self.updateReadonlyness(selfobj)
  File "/home/lheck/.FreeCAD/Mod/lattice2/lattice2PolarArray2.py", line 103, in updateReadonlyness
    arc = self.fetchArc(selfobj) 
  File "/home/lheck/.FreeCAD/Mod/lattice2/lattice2PolarArray2.py", line 115, in fetchArc
    return fetchArc(lnkobj, sub)
  File "/home/lheck/.FreeCAD/Mod/lattice2/lattice2PolarArray2.py", line 56, in fetchArc
    linkedShape = obj.Shape
<class 'AttributeError'>: 'App.GeoFeature' object has no attribute 'Shape'
448.595 <App> Document.cpp(3715): Failed to recompute lattice_polar_array#PolarArray: 'App.GeoFeature' object has no attribute 'Shape'
Recompute failed! Please check report view.

If I am using Lattice2 wrong, I will be glad if you can teach me how to fix this.

DeepSOIC commented 4 years ago

now I am using, and I am seeing this..

well, that's because the array is attached to XY plane. The array is trying to read out arc range from the shape it is attached to, and that causes the error (the plane having no shape, particularly).

Clean out the reference in attachment dialog, and the error should be gone.

leoheck commented 4 years ago

Like this?

image

Nothing has changed.

DeepSOIC commented 4 years ago

Well, the error is gone at least.

DeepSOIC commented 4 years ago

I think the problem with your model may be a tangent intersection in a Boolean operation. Try changing the rib sketch a bit and see if the situation is resolved. Like so, for example: image

leoheck commented 4 years ago

Nothing so far. The shell is a BSPline, does it can be related?

What should I put in Radius? The tip of the arrows should be inside the feature? Or the base of the feature? Or something else?

leoheck commented 4 years ago

Issue solved, It was missing the LatticePattern feature.