modifying a drawing

[Ken_Shea]

Say a completed drawing has a fillet of .125 except I want to modify that to .050 how is that done?

I did disconnect surfaces so that it can be selected.

Thanks
Ken

[wms]

Ken,
Have you closed out the program yet?
If you haven't close onecnc and restarted then you can use the "undo" button to get back to the point when there was NO fillet between the surfaces. Then it's just a matter of redoing the fillet to the new radius.
If you have restarted you will not be able to change the fillet, because as you found out when you disconected the surfaces, it has trimed the two or more surfaces in the fillet operation. And because the fillet needs to have two surfaces trimmed together or a solid model, so it can create the fillet, it will no longer fillet those features.
Bummer I know, but there is no way for the program to figure out exactly how to fillet the two together.
You will have to some how recreate the surfaces so they are trimmed together, by new surfaces or cut and merge operations, then you can refillet to the new size.
If you want me to take a look e-mail me the file.
Hope I explained this ok for you. If not let me know.

[Ken_Shea]

Man Ward does this mean I have to have a plan!

I was just using this as an learning exercise, actually it was on one of the drawing examples you sent. Let me play with your suggestions and see how far I get.

thanks
Ken

[wms]

Ken,
Ya like I know what you mean. You can increase your fillet size (say from .050 to .125) between two different surfaces that have been filleted. If you were to disconect the surfaces and then delete the fillets then you can use the fillet between two surfaces, blend or no blend. Because the two surfaces are closer than the fillet distance it will work. But it doesn't create a seamless fillet to all the a joining edges like it does with the fillet edges. This is because it doesn't have all the information to do a real clean job. It not it's fault. Just the way things work.
It will still machine the model, just doesn't look real pretty.

[wms]

Ken and others,
After I wrote the above post, I got to thinking about the planning ahead thing and thought I would pass along something that I do that you and maybe others may want to implement also.

Any time I am going to make a major change to my drawing, say fillet as above, I open a new drawing and "merge" my present drawing(say part1) into it. Then rename the new drawing some clever name (say Part1a). Now I have the original drawing "frozen" in time. And I do this thru out the entire process, from first line to finished drawing. (part1a, part1b, ect) That way I have a complete "set" of drawings, as the part evolves, just in case I need to go back in time.

It takes a little extra time, but it has saved my butt on more that one occasion.

[Kingkong]

Originally posted by wms Any time I am going to make a major change to my drawing, say fillet as above, I open a new drawing and "merge" my present drawing(say part1) into it. Then rename the new drawing some clever name (say Part1a).

Hi wms,
that is one way to make sure, that you are a little bit more error-resistant, but in my eyes it is just a workaround not a solution.
My dreams are looking like a feature-tree and possibilities for changing the parameters of any surface or solid. One more dream is trimming of surfaces and solids against lines OR surfaces OR solids.
For that reason i will update my current CAD-System to a 3D-Version, that has possibilities to do so.

My first intention to buy ONECNC was to replace my other CAD-Software,but at least it seems more comfortable, to have both.

Kingkong

[Mortek]

Ken,

I always make all my solids from wireframe. That way if I want to change a fillet, I change it in wireframe, recreate the surface, merge, and disconnect.

Ken

[HuFlungDung]

To be sure KingKong, trimming surfaces to each other and to planes should be next on the list of advancements. What with projecting and extrusion capabilities that we already enjoy, you wouldn't think that it would be too long before the trim graduates from mostly 2d into 3d functions, too. I can hardly wait to see whats up with the next patch for XPert.

[HuFlungDung]

Mortek, that sounds like a lot of extra work. It is far quicker to draw in solid (if applicable, and is a simple entity) and get many surfaces all done at once. You can always extract a curve from the edges where you need to make an adjustment.

In XP, btw, you can extract all the curves in one go, should you want. But this usually makes a clutter I don't really need, so I just extract what I need in the local area of concern and work on it.

[Mortek]

Murry I guess I do it that way because most of my drawings are from a complicated blueprint with draft angles and nothing level in Z and all, so I'm just in the habit of doing it this way
Ken

[HuFlungDung]

Oh, okay, then you may continue to do it that way;

[Mortek]

Thanks for your permission, I don't know how I would proceed without your approval, Oh Wise One.