Fillet Edge problem. Fillet keeps extending beyond...


#1

Hi,

I’m doing a rhinoceros v4 level 1 tutorial that came with the software.
I am doing extruding tutorial by making telephone receiver.
I made the receiver body and now am trying to fillet all the edges.

But my results of fillet edge keep coming out like these two pictures.


What am I doing wrong and how can I fix this?

cyrusyn


#2

My guess would be that the fillet radius is too big.
Fillet-edge-command only work sif there is no curve radius along the fillet-edge-curve that is smaller then fillet edge’s radius itself (because then the fillet surface would undercut itself).
Also if the the fillet curve ends between two surfaces which meet with an very narrow angel or have a amorph or kinda frayed shape then fillet edge command won’t work.

In other words try a slightly smaller fillet edge radius…


#3

I was just doing this with a class last week, haven’t seen that, though. Have you got all the relevan surfaces joined up? Are you using FilletEdge and not FilletSrf?


#4

first of all I think you modeled it badly! Rhino should fillet this object correctly! You probably already messed up the original curve somewhere, before extruding it!
or your scene tolerances are too big! thumb of rule: the tolerances have to be smaller than your fillet radius! lets say you wanna do a fillet of 0.05, but your tolerances are 0.1, it might fail! Use 0.01 instead!

If you prefer to fix your model:
easier but altering the model >try to fillet first the vertical edge (the one where your horizontal fillet fails!) by a small radius. for a simple model likt that it should work!

the way of the pro’s: fillet, accept the failure. you end up with a extended surface of your fillet. extend also the one that ends up where the fillet fails. now the two surfaces of the fillet should intersect! split them, delete the extended parts and try to to split the whole model with all the filleted surfaces!

should work!
otherwise post your model here, we can fix that


#5

Hi lukasdesign,

This model is part of the Level I training manual, it’s just a matter of extruding the various curves in the model, splitting and joining, then filleting, so it should work easily…


#6

Jim, I boolean unioned all the surfaced on the top half of the phone body have been using fillet edge. Strangely enough, when I choose the edges on the earpiece of the phone in the process of fillet edge, edges are segmented despite of union, instead of being in one continuous line…


#7

Thanks for your reply. I found that reducing the fillet radious didn’t do anything.


#8

by scene tolerance, do you mean the surface continuity? how can I check this in the rhynoceros?


#9

Thanks so much for your help. Here is the model.
http://forums.cgsociety.org/attachment.php?attachmentid=122846
If you could take a look at this and what things I did wrong, I would appreciate a lot.


#10

thx for uploading…sometimes the only wy to see a mistake!

I untrimmed all the filleted surfaces ( I hope you still have somewhre saved your previous file! without any trim applied!!), splitted everything again for having the edgy, basic shape of thephone. if not I did…can upload if you want!

I tried to filled with 0.1 radius, and it failed…

having closer at the surfaces I saw some strange things happing on your top part!

delete all that is shown in yellow on my picture, recreate it (planar surface).

repeat the fillet!

regards


#11

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