One simple question...

[William_Dec_45]

I'm attaching a file where I extruded 2 cylinder shapes from a flat object. The browser shows only one body, and both extrusion operations were 'join'. But there are edges between the cylinders and the flat object. It doesn't affect the ability to 3D print the part, but I just like to know what's going on when I can. Please... no lectures on how YouTube is taking me down the wrong path. It's all I have! And many of the YT lectures are posted by AutoDesk. In my profession, YOU might look stupid. But I would never tell you so. I would help you. Thank you for any kind responses.

[HughesTooling · Accepted solution]

Your sketches are not fully constrained and the radii are different in the 2 sketches.

[HughesTooling · Accepted solution]

You can do this using a single sketch so you don't risk errors.

Just set the Start to Object then select the top face. file's attached, check the heights as I deleted your extrudes.

[HughesTooling · Accepted solution]

Your first sketch doesn't show as fully constrained, (no padlock) although it is actually fully constrained. I think this is because of the offset you used. Below is a more simple way to construct the sketch that makes selection easier and also shows the fully constrained padlock. Screencast also shows how to use the single sketch and select the top face as the start for an extrude.

Mark

[jeff_strater · Accepted solution]

always follow @HughesTooling 's advice, you will never go wrong.  However, to answer your specific question, here is the reason for those edges:  The two cylinders have different diameters:

[TrippyLighting]

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@William_Dec_45 wrote:

... Please... no lectures on how YouTube is taking me down the wrong path. It's all I have! And many of the YT lectures are posted by AutoDesk...

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I don't think in your previous thread anyone suggested that you were stupid. Stupid people usually don't observe that a technique might be hackish. It was indeed!
I have to admit that the way you titled the thread ("A Disturbing Phenomenon" and the mention of "hackish" in combination with "fine piece of software")  had my alarm signals on red.

That is usually the sign of a user who is to overly confident in their abilities and quick to blame the software. 

In respect to YouTube videos, this is a difficult subject. I've developed a healthy respect for those that that do these webinars. I've created a number of tutorials myself and have created over 800 screencast to help users here on the forum. It is very easy to criticize someone's video but it is magnitudes more difficult and hard work to create a good tutorial. That is once you get past the first shock of watching your own stammering in your own first tutorial. I survived, but barely!

Take YouTube videos with a grain of salt and experiment on your own. If you can't figure it out or encounter a problem, continue to come here to the forum and ask questions.

[William_Dec_45]

Wow! I feel like such a fool. I'm still a noob but I certainly know by now to check for constraints and proper dimensions and so forth. I've developed a little confidence lately and failed to consider that the problem could be my failure to check the basics. Face is red, tail is tucked. Geez!

Anyhow, thank you very much. Thanks to all responders. I really appreciate it.

[William_Dec_45]

They say there's no such thing as a dumb question. "They" are wrong. This was a dumb question because I know better than post a file riddled with errors. I didn't even check those things because I thought I was beyond doing anything that sloppy. Thanks, guys.

[rushabhthakkar_910]

This Dimensioning error could also have been avoided by creating only Half of Body. And than Mirroring it... And finally Adjusting the Heights of the Cylinders... 

See this Screencast..  https://autode.sk/3vUOPM8 

*Note:- Do not see the Sketch not being fully constraint... My purpose was to portray modeling technique.. And not mainly Sketching.. 

[William_Dec_45]

"I don't think in your previous thread anyone suggested that you were stupid. Stupid people usually don't observe that a technique might be hackish. It was indeed!"

Just to be clear-- I only thought Brad's use of the delete key seemed hackish when/if the artifact could be avoided. to start with. And that's certainly not to say that Brad is a hack or that the software is inferior. Maybe that was his only option at the time of the recording. I considered that some "cure" for the artifact might have evolved and that you guys might know about it. I'm nowhere near savvy enough to suggest a bug. And when I referred to F3660 as "such a fine piece of software", I wasn't being sarcastic. I meant it. This is a classic example of the hazards of the written word without the benefit of emotion or intent of the writer.  

"I have to admit that the way you titled the thread ("A Disturbing Phenomenon" and the mention of "hackish" in combination with "fine piece of software") had my alarm signals on red."

The leftover material that needed to be eliminated (one way or another), at least in my mind, could be referred to as a phenomenon since it was not the developer's intention for the user to encounter it. And I suspect the team would be "disturbed" to notice there was something strange going on. Again-- my hats off to anyone who can make such a program even if it needs tweaking from time to time. What software doesn't?   

"That is usually the sign of a user who is to overly confident in their abilities and quick to blame the software."

F360 is waaaay too established and reliable for anyone with half a brain to declare it buggy especially by someone who probably couldn't code their way out of a wet paper bag.  At 75, I marvel every day that such magic could have evolved in my lifetime. When I was in high school, a pencil and t-square were as sophisticated as it got. Had anyone predicted Fusion360, someone would have thrown a net over them.  It's an amazing thing and I'm glad I get to use it for a while before the big dirt nap. It's truly a gift-horse for me and I ain't about to... (you know the rest of it).

"In respect to YouTube videos, this is a difficult subject. I've developed a healthy respect for those that that do these webinars. I've created a number of tutorials myself and have created over 800 screencast to help users here on the forum. It is very easy to criticize someone's video but it is magnitudes more difficult and hard work to create a good tutorial. That is once you get past the first shock of watching your own stammering in your own first tutorial. I survived, but barely!"

Same here. I tried making one short F360 for a friend. It was so crummy I took it down hoping that my friend never got around to watching it.

"Take YouTube videos with a grain of salt and experiment on your own. If you can't figure it out or encounter a problem, continue to come here to the forum and ask questions."

Thank you my friend!

Bill

[TheCADWhisperer]

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@William_Dec_45 wrote:

Had anyone predicted Fusion360, someone would have thrown a net over them.  It's an amazing thing…

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In his book first published in 1956, The Door into Summer, Robert Heinlein pretty much predicted Fusion 360.