Inconsistancies between CADS softwares

[DabblingSeer]

I’ve run into a puzzling issue while drawing a wall clock. In QCAD the tenons on the side panel match the mortises on the back panel perfectly, but after importing the drawing into FreeCAD the lower mortises and tenons are off by 7/16 in while everything else lines up exactly.

I create all my patterns in QCAD first because it’s easier, then import the drawing straight into FreeCAD. Both files are in inches, so it’s not a unit-conversion problem. Only the lower joints are affected; the rest remain in perfect alignment.

I’ve attached the drawings in case anyone can spot what I’m missing.

back panel.dxf

(229.5 KiB) Downloaded 245 times

[CVH]

Hi,

The issue might be the Splines at the bottom.
Explode those to polylines and report back if it fits then.

See the Application Preferences for exploding Splines.
A too strict tolerance may generate many short arc-like segments.

Regards,
CVH

[DabblingSeer]

CVH you are correct. I exploded the poly and it worked! How did you know?

[CVH]

Hi,

QCAD explodes Splines to Polylines that match with the original Spline pretty good.
It will always be an approximation.
Local curvature of a Spline changes continuously, that for an arc is steady.

Splines may be handled differently in other applications.
Fitpoints splines are perhaps not supported.


But you report that exploding a polyline to individual Lines and/or Arcs was the solution.
Simple rectangular shaped polylines in regards with 3 lines 3/4 of an inch long at the right.
Then I would suspect 3D data but I can't locate any.

Troubled But hey, it solved your problem.


When considered as solved, please add [Solved] to the title of your initial post by editing it.

Regards,
CVH

[DabblingSeer]

I can't help but wonder if formatting my computer had anything to do with it. Tomorrow I will import the drawing as is in freecad and see if it is splines or that my computer is finally running good. Freecad hasn't crashed while before it crashed all the time.

[DabblingSeer]

I couldn't wait till tomorrow so here is the verdict. The splines had nothing to do with it, but system corruption did. This means that I will have to recheck the drawings again. Thanks for you help mate.
Just so you know a computer should get completely formatted once every 6 months. This was the norm 20 years ago and now they changed it to you never have to. It still applies to today as it did then.It's impossible to do this for business computers but for your home computer it is possible.