Revolve result is not smooth

Forum|Forum|2 years ago
October 17, 2023
3 replies
4142 views

Hello guys.

I'm sorry to ask such a dumb question, but I'm absolutely stumped on it. And it's REALLY dumb.

The attached model is a simple revolve of a 25 mm wide tire profile with a 700 mm radius out to the rim. (Yes, it's not realistic, but this problem happens even if I reduce the radius to 400 or 50 or whatever.)

The revolve feature ends up all chunky, instead of smooth. If I reduce the radius to 50 mm, the inside of the feature ends up all chunky instead.

I have changed the model accuracy both up and down and nothing ever changes.

Thank you for advice on how to get back to the regular, smooth revolves that I know and love.

Edited to add:

OK, I think I see what's happening. Tourus-shaped revolves have this, but cylinder shaped ones do not. With this sketch:

I get this revolve, showing both the nice smooth edges I was expected, and the blocky edge (on the torus in the middle).

General

Best answer by Constantin

Hi,
this is definitely shading quality related (set to 1, 5 and 20 in the screenshots)

Shading quality.png

Why the shading quality setting only seems to apply to non ruled surface types, I do not know.

Shading quality2.png

T

tbraxton

22-Sapphire II

Try setting the edge display to high or very high and report back on the results of doing this.

File->Options

J

JA_10341562

Author

4-Participant

That did not fix it. (Mine was on medium.)

That reminded me that I use a config.pro full of defaults shared by my whole team. I set the startup directory of my Creo shortcut to use a directory with no config.pro, in order to get the defaults straight "out of the box" from PTC, and I still have the problem. I also created a new part not using our company default template, and still the same problem.

I also happen to have Creo 9 still installed, and it is doing the same thing.

I feel like I'm losing my mind, and that it's always been like this. But when I look at tutorials about adjusting precision, etc, I see beautiful smooth revolves that I can no longer get my Creo to draw. Argh!

T

tbraxton

22-Sapphire II

Try increasing the shade quality if you have not done that before. It is most likely a display issue. Post the model if this does not work, so it can be checked in a different environment.