Problem with chamfer


Good morning friends,

There seems to be a problem with chamfer. If you draw a simple rectangle and set chamfer to 1/8" x 1/8" you don’t seem to be a 45 degree angle.

I wonder if anyone else has noticed this?

Thank you.


(Willem Derks) #2

Hi Cosmas,

It’s working here as expected, can you post an example curve both without and with the chamfer?

Are you sure you set both sides to be 1/8 ?



Hi Willem,

That’s interesting. I just tried it again.

I drew a 2 1/2" x 2 1/2" square. I started at the bottom right hand corner and ran Chamfer with .125" x .125". The first one was fine. The second one was fine. The third one (upper left) was off. The fourth one was fine.

I repeated and the third and fourth were off.

I’ve attached the file and a screen grab for you to see.


chamfer (9.9 MB)


Hi Cosmas and Willem,

the error may be a bug or is related to the tolerance in the file. I´ve exploded the left camfered rectangle and tried to make a fillet with radius 0 in order to extend the two lines forming the upper left corner. This extension failed too for the horizontal line.

Then i´ve reduced the absolute tolerance from 0.1 to 0.01 and the fillet with radius 0 worked. As Willem, i can add the 1/8 camfer even with a tolerance of 0.1.