Arc joining to polyline

[Anonymous]

Everytime I try to join some arcs together to create a closed object, Autocad join them in a spline and not in a polyline made of arcs. It may be caused by that a lot of these arcs are tangent to the neighbour arcs? How can i solve this?

Thanks for the support.

[imadHabash]

Hi,

it supposed from PEDIT / JOIN commands to convert to polyline as i have here . 

Command: PEDIT
Select polyline or [Multiple]: m
Select objects: Specify opposite corner: 3 found

Select objects:
Convert Lines, Arcs and Splines to polylines [Yes/No]? <Y>

Enter an option [Close/Open/Join/Width/Fit/Spline/Decurve/Ltype gen/Reverse/Undo]: j

Join Type = Extend
Enter fuzz distance or [Jointype] <0.0000>:

EDIT : Make sure that you don't have any arc item as a SPLINE because if you have any spline object while joining then you will have a spline CAD item . 

[imadHabash]

also you can by SPLINEDIT command , convert your spline to polyline . 

[Kent1Cooper]

I agree with @imadHabash that if the result is a Spline, one possible reason is at least one of the "arcs" is really a Spline.  Another possibility is that the Arcs, though their ends meet, do not lie in the same plane.  If that's the case, PEDIT's Join option will not work, anyway.

[Anonymous]

Thanks @Kent1Cooper and @imadHabash  for the fast answer. I tried the @imadHabash methos and I ended up with not being able to join some pieces because, like @Kent1Cooper said, they're not in the same plane. I'll attach the result to this reply. The problem is that these polylines have the same elevation. Should I do a workaround with the PROJECTGEOMETRY?

EDIT: Even with FLATTEN, the FILLET command doesn't work

[imadHabash · Accepted solution]

i suggest in your case to try BPOLY command to create a closed polyline . 

[Kent1Cooper]

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@Anonymous wrote:

.... The problem is that these polylines have the same elevation. ....

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They won't join because they do not all have the same extrusion direction.  The Z-axis direction for some of them is down into the page rather than up off the page.  The BOUNDARY method is certainly easier than any other way of fixing that.