Bend wall producing an odd bend.

[leoheck]

Hi @shaise, I have this small tab that I want to bend the wall.

It is producing something like this.

With this message

17:13:55  pyException: Traceback (most recent call last):
  File "/home/lheck/.local/share/FreeCAD/v1-2/Mod/FreeCAD_SheetMetal/SheetMetalFoldCmd.py", line 267, in execute
    fp.Shape = smFold(bendR=fp.radius.Value,
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/lheck/.local/share/FreeCAD/v1-2/Mod/FreeCAD_SheetMetal/SheetMetalFoldCmd.py", line 124, in smFold
    solid1 = solid2list[0]
             ~~~~~~~~~~^^^
<class 'IndexError'>: list index out of range

I am not sure if I am doing something wrong. But the result is a bit odd.

This is the top view, showing the tab and the reference line.

The problem does not seem to be the overhang, since increasing the length of the line does not give a different result

Changing the angle changes the result, but the issue remains..

[leoheck]

Is something like this expected?
The goal is to make a shape like a 2.

[shaise]

Hi @leoheck ,

This is probably a bug. I need a sample file to debug it.
Regardless of that, bending on a line feature is not that recommended as it gives unpredictable measurements (because of k factor) , it is better to use bend on edge:

result:

[leoheck]

Bend on edge is better when we are extending a feature out of a shape. But when when we have an existing tab cut inside on a shape the bend wall gives a prediction of the resulting shape considering it's length is already set.

I have to check if I can make a sample file since I changed this problematic feature already.