CAD Forum - Database of tips, tricks and utilities for AutoCAD, Inventor and other Autodesk products [www.cadforum.cz]
Czech English Deutsch
Login/Register:
 Visitors: 2838 
RSS tips RSS channel - CAD tips
RSS discussion RSS channel - CAD discussion

Discussion Discussion forum

HelpCAD discussion

CAD Forum - Homepage CAD discussion forum - ask any CAD-related questions here, share your CAD knowledge on AutoCAD, Inventor, Revit and other Autodesk software with your peers from all over the world. To start a new topic, choose an appropriate forum.

Please abide by the rules of this forum.

How to post questions: register or login, go to the specific forum and click the NEW TOPIC button.
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

The information that you provide in this form will make up your forum profile which can be viewed by other forum members. Your email address will only be visible by forum admin and moderators and will be used to send you Forum Notifications. To cancel your account, use the page Opt-out or contact webmaster@cadforum.cz.

Modeling a Twisted Ribbon

 Post Reply Post Reply Page  <123>
Author
SEANT View Drop Down
Groupie
Groupie


Joined: 09.Jan.2012
Location: United States
Using: AutoCAD 2016
Status: Offline
Points: 31
Post Options Post Options   Thanks (0) Thanks(0)   Quote SEANT Quote  Post ReplyReply Direct Link To This Post Posted: 13.Oct.2018 at 11:43
Originally posted by philippe JOSEPH philippe JOSEPH wrote:

Seant you are number "ONE", tell us more !!!!!!!!!!!!
Eventually a "step by step" drawing ?
I suppose that LOFT is like Kent's method : LOFT between 2 concentric helixes, and then ...
I suppose that THICKEN is what Kent what waiting for or his next step. 
 

That's correct.  

I think the "Step by Step" would best be done by each individual.  I can tell you it's possible, you tell me what your specific steps were.  Experimenting is where we find the capabilities, and limitations, of AutoCAD.
Back to Top
John Connor View Drop Down
Senior Member
Senior Member


Joined: 01.Feb.2011
Location: United States
Using: AutoCAD 2018
Status: Offline
Points: 6934
Post Options Post Options   Thanks (0) Thanks(0)   Quote John Connor Quote  Post ReplyReply Direct Link To This Post Posted: 13.Oct.2018 at 13:55
Very nicely done and explained SEANT.
"Humans have a strength that cannot be measured. This is John Connor. If you are reading this, you are the resistance."

<<AutoCAD 2015>>

Back to Top
philippe JOSEPH View Drop Down
Senior Member
Senior Member


Joined: 14.Mar.2011
Location: France
Using: AutoCAD Mechanical 2017
Status: Offline
Points: 1020
Post Options Post Options   Thanks (0) Thanks(0)   Quote philippe JOSEPH Quote  Post ReplyReply Direct Link To This Post Posted: 15.Oct.2018 at 07:43
HOC ERAT IN VOTIS, but different.


Edited by philippe JOSEPH - 15.Oct.2018 at 08:02
Back to Top
SEANT View Drop Down
Groupie
Groupie


Joined: 09.Jan.2012
Location: United States
Using: AutoCAD 2016
Status: Offline
Points: 31
Post Options Post Options   Thanks (0) Thanks(0)   Quote SEANT Quote  Post ReplyReply Direct Link To This Post Posted: 15.Oct.2018 at 10:38
Nicely done.
Back to Top
philippe JOSEPH View Drop Down
Senior Member
Senior Member


Joined: 14.Mar.2011
Location: France
Using: AutoCAD Mechanical 2017
Status: Offline
Points: 1020
Post Options Post Options   Thanks (0) Thanks(0)   Quote philippe JOSEPH Quote  Post ReplyReply Direct Link To This Post Posted: 15.Oct.2018 at 12:41
Thanks Sean but I have to work the model to make it look much more like the very first image and also I have simplified the SUBTRACTed notches with a "simple" EXTRUDE of a region along a path like a thread that we can see for example on your image.
Back to Top
Kent Cooper View Drop Down
Senior Member
Senior Member


Joined: 12.Mar.2013
Location: United States
Using: AutoCAD, Architectural Desktop
Status: Offline
Points: 434
Post Options Post Options   Thanks (0) Thanks(0)   Quote Kent Cooper Quote  Post ReplyReply Direct Link To This Post Posted: 16.Oct.2018 at 20:41
Originally posted by philippe JOSEPH philippe JOSEPH wrote:

...
I suppose that THICKEN is what Kent what waiting for or his next step. 
 
Yes, it is [a newer command than the version of AutoCAD I used for years, so I wasn't aware of it].  BUT if the small difference matters, THICKEN goes only one way from a Surface, with no center-the-thickness option -- it's not like giving a Polyline width [which is centered].  So if the thickness of the ribbon needs to be centered across the zero-thickness twisting Surface, I think it's necessary to LOFT from one Helix to the other, and also LOFT in the other order [from the other to the one], and THICKEN both of the Surfaces by half the desired total thickness, then UNION the two Solid results together [and Erase the Surfaces if you like, if DELOBJ wasn't set to do that in the process of Thickening].
Back to Top
philippe JOSEPH View Drop Down
Senior Member
Senior Member


Joined: 14.Mar.2011
Location: France
Using: AutoCAD Mechanical 2017
Status: Offline
Points: 1020
Post Options Post Options   Thanks (0) Thanks(0)   Quote philippe JOSEPH Quote  Post ReplyReply Direct Link To This Post Posted: 17.Oct.2018 at 07:13
I have placed my AutoCAD file : Modeling a Twisted Ribbon-01.dwg here in the CAD/BIM Blocks library.
Back to Top
SEANT View Drop Down
Groupie
Groupie


Joined: 09.Jan.2012
Location: United States
Using: AutoCAD 2016
Status: Offline
Points: 31
Post Options Post Options   Thanks (0) Thanks(0)   Quote SEANT Quote  Post ReplyReply Direct Link To This Post Posted: 18.Oct.2018 at 09:53
Very nice model, and excellent tutorial.  

I see now that your earlier request to me was an opportunity/offer to create the tutorial.  This may be a little late but, Thank you.  

I'll see if some time presents itself - perhaps I can put something together that has something new to offer. 
Back to Top
SEANT View Drop Down
Groupie
Groupie


Joined: 09.Jan.2012
Location: United States
Using: AutoCAD 2016
Status: Offline
Points: 31
Post Options Post Options   Thanks (0) Thanks(0)   Quote SEANT Quote  Post ReplyReply Direct Link To This Post Posted: 18.Oct.2018 at 09:58
Originally posted by Kent Cooper Kent Cooper wrote:

Originally posted by philippe JOSEPH philippe JOSEPH wrote:

...
I suppose that THICKEN is what Kent what waiting for or his next step. 
 
Yes, it is [a newer command than the version of AutoCAD I used for years, so I wasn't aware of it].  BUT if the small difference matters, THICKEN goes only one way from a Surface, with no center-the-thickness option -- it's not like giving a Polyline width [which is centered].  So if the thickness of the ribbon needs to be centered across the zero-thickness twisting Surface, I think it's necessary to LOFT from one Helix to the other, and also LOFT in the other order [from the other to the one], and THICKEN both of the Surfaces by half the desired total thickness, then UNION the two Solid results together [and Erase the Surfaces if you like, if DELOBJ wasn't set to do that in the process of Thickening].
 

Good point.  If I do find the time to create a version of a tutorial, I'll keep accuracy in mind.  
Back to Top
SEANT View Drop Down
Groupie
Groupie


Joined: 09.Jan.2012
Location: United States
Using: AutoCAD 2016
Status: Offline
Points: 31
Post Options Post Options   Thanks (0) Thanks(0)   Quote SEANT Quote  Post ReplyReply Direct Link To This Post Posted: 18.Oct.2018 at 10:09
I suppose keeping a mind towards accuracy requires hard parameters.  The OP (Arunvigneshram) had a picture, and a description of a strip of metal inserted into a pipe.  A new tutorial should make use of philippe's dimensions - a 20 mm inside diameter pipe @ 180 mm long with a .2 mm thick strip with one twist.

I'll see what I can do.


Edited by SEANT - 18.Oct.2018 at 10:17
Back to Top

Related CAD tips:


 Post Reply Post Reply Page  <123>
  Share Topic   

Forum Jump Forum Permissions View Drop Down



This page was generated in 0,063 seconds.