Some entities were discarded during import?

AutoCAD to Protel99SE and line loss problem solved0

In my work, I often need to import the drawings in AutoCAD to Protel99SE, and the biggest problem encountered in the import process is that the imported drawings lose curves (arcs). I searched Google and didn't find a perfect solution, either I didn't know what I was talking about, or I didn't answer the question.

However, there are some clues on the Internet, which provided me with some ideas, and after several attempts, I finally solved this problem. Let's share the solution with you.

AutoCAD version: AutoCAD 2004 CHS

Be sure to save it as a lower version of DXF, save it as a higher version, and an error will be reported when protel99se is imported.

2. Create a new PCB in Protel99SE and import the DXF file. Pay attention to the selection of parameters when importing.

OK, the import operation is complete.

There are two issues that can be encountered with the import operation:

1. There is no prompt after importing, but looking at the imported graphics, I found that some arcs (curves) are misaligned and deviate from the original position.

This will happen when you convert some graphs that indicate that they are missing their entities after importing them into blocks and then import them into protel99se.

2. Some entities were discarded during import, and some line segments will be lost after importing, the most common is the loss of arcs or curves.

In the case of the above two problems, the dwg file needs to be processed.

One of the dumber ways to do this is:

In the layer where the curve is located, redraw the curve again, so that when importing to protel99se, even if it prompts "some entities were discarded during import", the original curve is lost, and the newly drawn curve is still imported normally, and the result is a complete graph.

In the case of a relatively small number of curves, this method can be considered. But once there are too many, this method is too inefficient. Here's another approach.

Steps: 1. Break up the graphics that need to be imported.

Click on the toolbar icon or enter the command explode

This step may not have any effect, so it is better to do it for the sake of insurance.

2. Convert the curve into a polyline.

Enter the command flatten

Select the curves you want to convert (you can select more than one).

Press the space or enter key, type no, and then press the space or enter key.

After following the steps above, the curve is converted to a polyline.

3. Save the DWG file as AutoCAD R12 LT2 DXF

Note: Flatten is an extension command that requires AutoCAD Express Tools to be installed beforehand. The software is included in the installation package. This is shown in the figure below.

No way! And such things.