Unwanted mirroring on import

[hespj]

After a frustrating hour or two trying to import a drawing into Partwizard I need help. Can anybody tell me why this drawing in AutoCad:


4074

becomes this in PartWizard?


4075


I've had this problem before and somehow got round it, but this time I'm stuck.

John

[mikejohn]

John
Try this this copy the original drawing and move it a long way right.
erase the original.
Move the copy back to its original position.
This has worked for me for other problems

............Mike

[hespj]

Thanks Mike, but doesn't work. I'll try some other changes to the drawing and see if they work.

John

[scottcox]

John,

I've found that PW2 does that to the vectors that I've mirror copied in TurboCad. I can go back to the DXF and explode then re-join the polylines and it then imports into PW2 correctly.

Good luck.

[hespj]

Thanks Scott. Again, no joy.

I should add that the original drawing was done in Rhino. I export the drawing as either a dwg or a dxf and check it in Acad before importing into PartWizard (once in PartWizard I feel I'm in the hands of the Gods. Or more likely, the hands of the Devils).

[hespj]

How stupid of me!!! Suddenly remembered that RhinoCam does this sort of thing. Most of my ShopBot work is 3D and I do all this with RhinoCam, so don't really think of it as a 2D software. 15 minutes later..........


4076

[mikejohn]

John
It is very true that files imported into AutoCad, then re-saved from AutoCad, often don't behave the same as similar files created in AutoCad.

..............Mike

[gerald_d]

When we have save a suspect drawing open in AutoCad, we do the following:

-select everything on the problem sheet with the cursor
-copy to clipboard
-open a new sheet in AutoCad
-draw a 0,0 point on the new sheet
-paste clipboard to new sheet
-reposition relative to the 0,0 on the new sheet (we have problems in moving the AutoCad "origin" to the parts - we prefer moving the parts to the origin)
-close the problem drawing
-save new sheet to the "problem" file name

This procedure makes for a leaner, true, AutoCad file.

[mikejohn]

Note that in AutoCad 'copy to clipboard' (Control C) is different to the 'Copy' command.

Lots of problems with files imported into AutoCad are 'ghost' lines causng the problems.

..........Mike

[Mike Windsor]

I've had that problem , it is usually because the entities arent on a Z zero plane by .0001 , or something realy small that you cant see . When I use Rhino I always " project to C plane " before exporting any vectors .

[hespj]

Thanks everybody for the help and info. (Been to busy with the parts to visit the forum since. Had to stack them up to make a 3D block prior to machining.)

Gerald, I'll try that.

Mike W, I think you've hit the nail on the head. I've noticed that Rhino does sometimes show lines slightly (3 x 10^-13 or similar) off zero. "Project to Const plane" it is from now on. I wonder if Gerald's method actually achieves the same thing in Acad.