Show full version of the posting: 3d surfaces, advanced 3d, 3d modeling, 3d general

eaaronf01
17.01.2017, 01:02
HELLO ALL YOU CAD LOVERS,I HAVE BEEN USING AUTOCAD FOR 20+ YEARS, 2D AND 3D, BUT MY 3D ABILITIES ARE VERY LIMITED TO, REGION, EXTRUDE, UNION, SLICE, SUBTRACT, AND A COUPLE MORE SIMPLE COMMANDS.  ALL THESE YEARS THESE BASIC COMMANDS HAVE SUITED ME WELL, BUT I KNOW I NEED TO LEARN SOME MORE, LIKE SURFACE.......HERE IS MY OBJECTIVE.  I AM DESIGNING THIS CIGAR POST ASHTRAY STAND, AND I NEED TO PUT A BAND AROUND THE CIGAR.  IN 2D THE BAND LOOKS LIKE THIS ( THE SECOND  PICTURE) THE CIGAR IS 6 CENTIMETERS IN DIAMETER, BUT DIMENSIONS AREN'T IMPORTANT AT THE MOMENT.  I WANT THIS BAND TO GO AROUND A 3D ROD WHICH REPRESENTS THE CIGAR.  FROM A SIDE VIEW I WANT THE BAND TO BE THICK, LIKE SAY 1 MILLIMETER.  THIS IS WHAT I HAVE SO FAR, AS YOU CAN SEE THE ELLIPSE PART OF THE BAND SHOULD BE SMOOTH FLOWING AROUND THE CIGAR WITH THE REST OF THE BANDTHE GRAPHIC ON THE BAND IS NOT IMPORTANT AT THIS POINT, ALL I WANT TO DO IS PUT A SMOOTH FLOWING BAND AROUND THE CIGAR, WITH THICKNESS AS LIKE IN MY SAMPLESWHO OUT THERE CAN SHOW ME THE BEST AND EASIEST WAY TO ACHIEVE THIS.THANK YOUERIC
eaaronf012017-01-17 01:28:48

John Connor
17.01.2017, 11:32
Is other words you want the elliptical portion of the band to fit the curve of the cigar.  Is that correct?

John Connor
17.01.2017, 11:58
Is this kind of what you had in mind?  Forget for the moment that we're talking about a cigar band.  The following is for demonstration purposes only.

John Connor
17.01.2017, 12:02
Another view.The basic concept was based upon extruding an ellipse then slicing off the front and back.  In the examples shown I did not slice off the front so it was flush with the band.  You however would.

John Connor2017-01-17 12:22:29

eaaronf01
17.01.2017, 12:21
YES, THAT IS PRETTY GOOD!!  THE ELLIPTICAL PORTION DOESN'T HAVE TO BE QUITE SO THICK, BUT THE WAY THAT THE BAND FOLLOWS THE CURVE AROUND THE POST IS EXACTLY WHAT I AM AFTER.  WHAT COMMANDS DO YOU USE TO DO THIS?  IM SURE IF I PLAYED AROUND WITH IT LONG ENOUGH AND WITH TRIAL AND ERROR I COULD PROBABLY ACHIEVE IT, BUT KNOWING AUTOCAD, THERE IS A VERY SIMPLE WAY TO DO THIS, AM I RIGHT?SO HOW DID YOU DO IT?  I WOULD GREATLY APPRECIATE THE ENLIGHTENMENT, IF YOU WOULDN'T MIND.THANK YOUERIC

John Connor
17.01.2017, 12:29
Yes, my band is thick but like I previously said this was meant for demonstration purposes only.  Your results may vary.Here is what the band looks like with the elliptical portion cut flush with the band.I used the SLICE command with the Surface option.  An extruded arc was my slicing surface for the front.

eaaronf01
17.01.2017, 12:50
YES!!!THIS IS EXACTLY WHAT I WANT?  I HAVE NO IDEA HOW TO SLICE WITH SURFACE OPTION.  IN FACT, I HAVE NEVER USED THE SURFACE COMMAND, OR EVEN WORKED WITH SURFACES AT ALL  AND I DID NOT KNOW YOU COULD SLICE ON A CURVE

John Connor
17.01.2017, 13:00
Show me where I said I used a command called SURFACE.  I didn't.  I said I used the SLICE command which if you look at the command line has the following options.Specify start point of slicing plane or [planar Object/Surface/Zaxis/View/XY/YZ/ZX/3points] <3points>:You can "slice on a curve" by extruding an arc.  A line or an arc that is extruded YIELDS a surface.  The surface is an object that can be used to slice another surface or a solid.

John Connor
17.01.2017, 13:08
A simple demonstration.  The red arrow is pointing to the arc that ends up getting extruded.  Visual style = 2Dwireframe.

John Connor
17.01.2017, 13:11
Same demonstration only this time I changed the color of the arc to green and the visual style to conceptual.

eaaronf01
17.01.2017, 13:45
OKAY , WELL THIS WILL BE VERY USEFUL FROM NOW ON,  THANK YOU FOR ALL THE HELP.I DO APPRECIATE ITTHIS IS EXACTLY WHAT I NEEDED TO KNOW  GOOD JOB!!!

John Connor
17.01.2017, 13:49
Well good luck.  Post an image when you're done.

eaaronf01
17.01.2017, 15:13
OH, ABSOLUTELY, I WILL BE HONORED                "THERE IS NOTHING MORE IMPORTANT THAN AUTOCAD"A QUOTE FROM MY TEACHER!!  ART WHITTON, "MY CAD SITE"  MAYBE YOU HAVE HEARD OF HIMDRAWINGS WILL BE POSTED SOON,THANKS AGAINERIC

John Connor
17.01.2017, 15:19
Yes, I am familiar with that website.FYI...the use of all caps is frowned upon in most Internet forums as it is considered to be the equivalent of yelling.  Just thought you should know.

eaaronf01
17.01.2017, 15:23
Yes, I Have heard that beforebut it just comes from me being a Draftsman, for 28 years, all my text is always in capsthat's just the way drafting is done,  and now it is a habit , lower case to me just seems insignificant, ya know?? BUT YOUR POINT IS TAKEN, ILL TRY TO CONFORM!!ThanksEric

John Connor
17.01.2017, 15:49
Everyone is a wise guy.If lower case is insignificant I guess you don't bother reading books?
John Connor2017-01-17 15:49:39

eaaronf01
17.01.2017, 16:05
John Grisham
One of my all-time favorites.  What is huge font considered?  HA HA

John Connor
17.01.2017, 16:08
OK...now you are just be annoying.  And to think I helped you solve your problem.  Next time I'll think better of that idea.

eaaronf01
17.01.2017, 17:28
NAW, YOU LIKE IT TOO MUCH,I KNOW!!ANYWAYTHANKS AGAINHAVE A NICE DAY

eaaronf01
17.01.2017, 17:29
NEXT TIME ILL DIRECT MY QUESTIONS DIRECTLY TO YOU!!I DO HAVE SOME MOREI GOTTA WORK NOWOUT

John Connor
17.01.2017, 17:35
I'm sure Philippe will be more than happy to answer any questions you have.  He's pretty good at 3D.