Objects don't follow path array

[Anonymous]

I'm working with a provided horizontal polyline with curves and lines.  The curves are not necessarily tangent, which I think is the problem.  I'm trying to array a perpendicular line measured 6.0049' apart along the centerline.  The problem is the objects leave the path when a curve is encountered.  The objects also loose the perpendiclar orientation to the path.  I've recreate the polyline several times via different meathods and get the same results.  Within the same drawing, I did a couple of test.  1.  used a simi circle as the path; 2.  used a polyline with all curves tangent.  In each of these tests the array worked as expected.  I've attached a wblock of the dwg with the issue.  How can I get this path array to work on the non tangent polyline?  Any suggestions are appriciated.

Thanks,

Jeff

[Pointdump]

Jeff,

Not sure I understand what you're doing. Are you talking about Vehicle Tracking?

It looks like something is a bit off:

Dave

[Anonymous]

Dave,

Thanks for the response.  Ultimately, I'm simply trying to array an object (line) along the polyline.  Specifically, I'm identifying the location of individual tunnel segments along the tunnel alignment.  In my attached drawing, the magenta array and the yellow semi circle are my successful tests.  The yellow array is where I'm having problems, which you have noticed.  I assume this is due to the curves not being tangent to the incoming and outgoing lines.  What I don't understand is why this would be a problem.  Any ideas for why this doesn't work and for a solution?

Thanks again,

Jeff

[Pointdump]

Jeff,

I don't think the problem is non-tangent curves. How did you array those perpendicular lines? Why 6.0049'? Did you try using DIVIDE?

Dave

[Pointdump]

I meant MEASURE, not DIVIDE.

Dave

[Anonymous]

Thanks for getting my to think more.  I found the problem.  I've been starting the array, not at the beginng of the polyline, but at point further along.  This now makes perfect sence to me since the insertion point of the object was a couple hundred feet behind the object.

[Pointdump · Accepted solution]

Jeff,

I made a Block, a red line 23' long. Then I used the MEASURE Command to put the Block every 6 feet. Seems to have worked:

Dave

[Anonymous]

Dave,

Thanks for looking into this.  One huge piece of information that I left out was that I'm not starting the array (segments) at the beginning of the alingment.  The provided alighment (polyline) starts well before the array.  Once I trimmed the polyline to match the start point of the array, all works well. 

I greatly appreciate your help.

Jeff