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

[BIGAL]

Re draw stairs why the need for a dynamic block ? You can do from first principles by 2 methods work out the rise run etc to meet code. Using a block can place along a line using copy or multiple insert, another way is use array the block single row with multiple columns. When using Array use UCS Object pick the line for the array, then UCS W.

 

NOTE the important part about Rise/Run meeting code.

[zaphod]

12 hours ago, BIGAL said:

NOTE the important part about Rise/Run meeting code.

Thank you for your time.

 

The inside stringer is set to code, because we do not "roll" our stringer plates, the outside plates are different than the inside plates, this forces the plates to form a spiral.

Really more of a polygon shape with a lot of edges, the selected objects below are for the outside stringer, while they start off in the same position, they move further apart each step, the amount is determined by the diameters.

While the math for solving how much the difference is per step isn't very complicated, but it can be very time consuming.

All of my searching leads me to believe that a path array will never be the answer, at least for the outside. 

  

 

Edited 1 hour ago by zaphod