Having trouble working with surfaces

[rossjm5075]

I'm trying to learn how to work with surfaces and am following along with a tutorial, but can't recreate the steps in the tutorial. Attached are: 1. the Fusion 360 model, and 2. the steps from the tutorial I'm trying (unsuccessfully) to take. Many thanks if anyone can please let me know what I'm doing wrong! (Specifically, I can't select the "edge piece" geometry to trim).

[g-andresen]

Hi,

1. Which tutorial are you talking about?
2. There are only solids in your design.
    Surface tools are not applicable to solids.

günther

[aliobidi]

Hi , 
there is no surface in the file 
Btw 
these two line must divide to have 3 sketch loop to cut and delete the two end pieces

 you should work in this environment not in solid work place 

[jhackney1972 · Accepted solution]

You picked a poor tutorial, the author is not clear on his instructions, I hope I interpret them correctly myself.  One thing you must understand about the Split Face command.  It must full cross the area you are going to split.  That is why, in the Screencast, I split the whole curved sketch out of the face first, then come back and do the ends.  After the first split, the end sketch lines cross the face completely.  I hope this helps.  Model up to the point of your instructions is attached.

[TrippyLighting]

It is generally a bad idea - In Fusion 360 - to offset splines, or projected curves that were created from splines.

The original curve is fine:

The curvature of the projected curves its completely broken:

[jhackney1972]

No argument from me.  I was just following the poster's PDF as he wanted to see it executed.

[g-andresen]

Hi,

I would like to remind again that @rossjm5075  has not given any hint about the tutorial used so far.
However, it is obvious that he acts differently than in this tutorial in the field of solid tools.

günther

[rossjm5075]

Many thanks for your reply, but I didn't see anything attached. Thank you in advance for attaching. - Best, JR

[rossjm5075]

Many thanks for your comments, but please note I'm brand new to CAD-CAM/Autodesk, etc and am just trying to follow along and replicate the tutorial. If you have any insights as to why I've not been able to do so, I'd be most grateful for your feedback.

[jhackney1972]

Look at my post, message number 4, below the Screencast after my signature, the file is attached.  It is in the same location as your attachments except mine is a little longer.

[rossjm5075]

Thank you for your reply.

1. When you write "solid tools" I thought the tutorial was using "surface tools"?
2. Any clues about how I'm acting differently from the tutorial? That's the whole point of my question. From my perspective, I followed the tutorial exactly as presented, but wasn't able to achieve the same results. I'd like to know what I'm doing wrong. Many thanks in advance if any feedback!

Kind regards,
JR

[rossjm5075]

Thank you, that's very, VERY helpful!!

 (And my bad regarding the attachment! I checked your post originally from my email, and the attachment didn't come through there, but I now see it here on the site).

The tutorial left out one very important step that solved my question: projecting the edge down onto the offset surface. Question: Why do we need to project the edge down onto the surface? Doesn't the surface already have an edge that we can offset?

Thank you again for your tremendous help!

[rossjm5075]

. . . Many thanks once again for your great solution. Just a quick note, I tried your solution separately without that last Project, and it still works.

My thought is that the tutorial is a bit old and maybe the trim functionality has changed a bit since then. But even still, I don't see how it could have worked with the last Trim features taking place in the "bottom surface" as the tutorial showed. The Trim features had to have taken place in the offset surface, as your solution showed.

Thank you!!

[jhackney1972]

I was being cautious, as I do not know your Fusion 360 Preference settings.  The way I did it works if you Preferences are one way and yours and mine work if they are set another so I am successful no matter what condition exist.

[TrippyLighting]

@rossjm5075 I see you referencing "a" tutorial in several posts, but I don't see a link to it.  Can you provide that please ?