Fillet this please, same as previous post

This is what I did.

Draw a rectangle 400 x 150 units. Fillet the four corners with radius 9.525

Extrude the rectangle by 50 units. Try to fillet all edges with radius 25.

Without using 'chain', all edges can be filleted with radius 25 EXCEPT the four rounded corners.

Please try it and see for yourself. This is supposed to work in an actual real-world workshop / machine shop, so why can't it be done in Autocad2002? I see no reason for the error except a program deficiency. Am I wrong? Please try it. Thank you!

AutoCAD 2002's face trimming code isn’t equipped to process the change in topology. See Red, Green and Blue arcs in attached.

Also see possible workaround.

Fillet.dwg

Once again I find that I must question my results based on the new information you've provided above. I will have to have another go at it.

I used AutoCAD 2009 on your previous example.

It is quite possible I’m reading more into the original post than I should.

My interpretation was to reproduce a model based on what a 25 mm radius cutter (CNC Router, perhaps) would make as it followed a rectangular path with a 9.525 corner fillets.

Marlon’s comment “Without using ‘chain’” seem to support that because the chain option will produce an elliptical corner profiles as the solid flows from the 9.525 perimeter to a point coincident with the straight edges 25mm rad.

If I have indeed misinterpreted the intention then please disregard my post.

SEANT, in your file fillet.dwg , how did you make the cyan-colored object? I'm referring to the 'corner' that were UNIONed to the rectangular object.

Thank you.

The _Revolve command. See command sequence and image below.

Command: _revolve

Current wire frame density: ISOLINES=4

Select objects to revolve: 1 found

Select objects to revolve:

Specify axis start point or define axis by [Object/X/Y/Z]

Specify axis endpoint:

Specify angle of revolution or [sTart angle] : 90

Hello Seant. I understand the revolve now, but how did you come up with the height and shape (curved line to be revolved) of the object? Approximation?

I'm assuming you got the curve by drawing the green arcs, and in order to get the green arcs, you have to draw the red and blue arcs, but how did you draw the read and blue arcs?

Sorry, beginner here.

Thanks for your patience.

WAIT, I THINK I'M GETTING IT.......DON'T TELL ME HOW YOU DID IT FOR NOW..

ok I finally got it. I'm such a genius. Thanks guys!

Let me know how you made out.