Array Path stretch issue

[zaphod]

Hello, I seem to have come across an issue with array path, I am using a straight line as my path and when I stretch it in any direction the objects rotate.

I intend to include this in a dynamic block, but I have to prove the concept first. This is for a spiral stairway; I have found a way to make AutoCAD do the required calculations but cannot find a way for the path array to be altered without having an issue.

I have done this in Autodesk inventor, however we have very few licenses for it, most of which are being used by engineers.

Attached is a "Basic" example of the path array.

 

Path Array Sample.dwg