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rohit_rajan15-Moonstone
15-Moonstone
September 9, 2014
Question

why this part does not shell at the given thickness of 0.13?

why this part does not shell at the given thickness of 0.13?

the drawing pdf and the part file has been attched...the video is there on

http://www.e-cognition.net/pages/Servo_Cover-01.htm


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19 replies

TomD.inPDX17-Peridot
17-Peridot
September 9, 2014

You haven't created the draft or round features around the bolt holes. Works fine if you first put these in before the shell.

Shell is a seriously deficient command. It had absolutely no hints as to why things work... and when things fail. It either is or isn't functional for your needs.

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rohit_rajan15-MoonstoneAuthor
15-Moonstone
September 10, 2014

it might be a deficient command ..but it is a very important tool for design..wake up PTC!

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TomD.inPDX17-Peridot
17-Peridot
September 10, 2014

Today I got the "annual" -how we doin'- survey from PTC. I really don't think they get it.

I do appreciate people like E-Cognition for their excellent contributions to the usability of PTC's products.

Every time I review such demonstrations I learn something I long forgot or never grasped.

Why PTC doesn't take that level of interest in new users is beyond me. I see a lot of hype videos that everyone can access, but this kind of in depth teaching just isn't there. Just fixing the help system (as they promised to do! ...and failed!) and adding some serious context sensitive help could really be a game changer.

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Inoram14-Alexandrite
14-Alexandrite
September 9, 2014

whatshell.JPG

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TomD.inPDX17-Peridot
17-Peridot
September 9, 2014

It failed on my M040 Creo 2.0 as well until I added the draft and rounds.

Do you think maybe PTC fixed the shell feature?

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Inoram14-Alexandrite
14-Alexandrite
September 9, 2014

I changed .38 to .385.

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gšvigelj1-Visitor
1-Visitor
September 11, 2014

Try to change part accuracy from relative to absolute.

servo_cover_acc.png

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TomD.inPDX17-Peridot
17-Peridot
September 11, 2014

I tried absolute at .00005 and it still failed. Once I reset the absolute accuracy lower bound to .000001 I could set absolute accuracy to .000015 and it worked. Funny though. After a successful feature creation, I could change the accuracy back to .0001 absolute and regeneration worked. Way too much voodoo behind accuracy!

With double precision, the system should automatically calculate a solution to higher levels when needed. I might accept a warning, but these features shouldn't fail due to accuracy limits.

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rohit_rajan15-MoonstoneAuthor
15-Moonstone
September 21, 2014

ok lets make this in solidworks ......and see the difference?....in terms of modelling it

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