CAD Forum discussion (EN) : How to Create Helix? https://www.cadforum.cz/forum_en/ Fri, 10 Jul 2026 07:53:42 +0000 Mon, 28 Jan 2019 07:27:25 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://www.cadforum.cz/forum_en/RSS_post_feed.asp?TID=13077 <![CDATA[CAD Forum discussion (EN)]]> https://www.cadforum.cz/forum_en/forum_images/web_wiz_forums.png https://www.cadforum.cz/forum_en/ <![CDATA[How to Create Helix? : Hello, I have placed in the CAD/BIM...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36718&title=how-to-create-helix#36718 Author: philippe JOSEPH
Subject: 13077
Posted: 28.Jan.2019 at 07:27

Hello, I have placed in the CAD/BIM Blocks library here in the site the file : R300-20.dwg taken out of the CD-ROM of the old AutoCAD R14.
It shows an air cylinder asssembly including the famous approximate 3D coil sping mark "7" in yellow.
Look at it and you will see an assembly of extruded arcs to make it look alike a real sweeped one.
Maybe the good way for dery making his own one.

]]> Mon, 28 Jan 2019 07:27:25 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36718&title=how-to-create-helix#36718 <![CDATA[How to Create Helix? : Yes because helix is coming after...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36717&title=how-to-create-helix#36717 Author: philippe JOSEPH
Subject: 13077
Posted: 26.Jan.2019 at 08:55

Yes because helix is coming after 2007 but is it working with the lisp provided here under that is creating a 3D polyline with a selected number of points ( eventually a lot )?
And then as it's not possible to SWEEP with AutoCAD2002 something along that polyline, what will be the result of an eventual EXTRUDE with millions of facets?
That's why I did propose at first to built an approximate model with various simple elements of arcs.
In old releases of AutoCAD you could find in the samples loaded with the program on the disk (C) an example of a 3D coil spring apparently correct but made of various arcs in an air jack with coil return spring.


Edited by philippe JOSEPH - 26.Jan.2019 at 09:08]]> Sat, 26 Jan 2019 08:55:27 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36717&title=how-to-create-helix#36717 <![CDATA[How to Create Helix? : philippe JOSEPH wrote:Or maybe&#034;...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36716&title=how-to-create-helix#36716 Author: Kent Cooper
Subject: 13077
Posted: 25.Jan.2019 at 22:03

Originally posted by philippe JOSEPH philippe JOSEPH wrote:

Or maybe" EXTRUDE along a path" works in AutoCAD 2002 with a helix I don't remember...
 
[It wouldn't, because not only the Helix command but also the Helix entity type didn't exist yet.]
]]> Fri, 25 Jan 2019 22:03:06 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36716&title=how-to-create-helix#36716 <![CDATA[How to Create Helix? : Or maybe&#034; EXTRUDE along a...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36715&title=how-to-create-helix#36715 Author: philippe JOSEPH
Subject: 13077
Posted: 25.Jan.2019 at 20:16

Or maybe" EXTRUDE along a path" works in AutoCAD 2002 with a helix I don't remember...]]> Fri, 25 Jan 2019 20:16:50 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36715&title=how-to-create-helix#36715 <![CDATA[How to Create Helix? : Hello dery and John, on 24 april...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36713&title=how-to-create-helix#36713 Author: philippe JOSEPH
Subject: 13077
Posted: 25.Jan.2019 at 07:17

Hello dery and John, on 24 april 2017 scj.schulz gave me a lisp to draw perfect helix ( standard AutoCAD helix are not perfect ) :
Try to make it work on your AutoCAD2002 then tell us what you do with it because you can SWEEP after AutoCAD 2007.

>>
(defun C:HELIX_scj (/ aunits_old osmode_old acc height radius delta_angdelta_h)
;; approximation by a 3D-SPLINE with adjustable accuracy
(setq alpha 0.0 h 0.0)

(setq acc 10000)
(setq height 100.0)
(setq radius 100.0)

(setq AUNITS_old (getvar "AUNITS") OSMODE_old (getvar"OSMODE"))
(setvar "AUNITS" 3)
(setvar "OSMODE" 0)
(setq delta_ang (/ (* 2 pi) acc) delta_h (/ height acc))
(command "_SPLINE")

(repeat (+ 1 acc)
    (progn
    (command (strcat (rtos radius) "<" (rtos alpha)"," (rtos h)))
    (setq alpha (+ alpha delta_ang) h (+ h delta_h))
    )
)

(command "")
(command "")
(command "")
(setvar "AUNITS" aunits_old)
(setvar "OSMODE" osmode_old)
)
>>


]]> Fri, 25 Jan 2019 07:17:08 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36713&title=how-to-create-helix#36713 <![CDATA[How to Create Helix? : I would suggest trying to find...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36709&title=how-to-create-helix#36709 Author: John Connor
Subject: 13077
Posted: 24.Jan.2019 at 16:44

I would suggest trying to find a custom helix lisp routine and test it with your version f AutoCAD.  There's probably one available at this website (cadforum) but I haven't bothered to check.  ]]> Thu, 24 Jan 2019 16:44:51 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36709&title=how-to-create-helix#36709 <![CDATA[How to Create Helix? : Hello dery, HELIX is comming with...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36703&title=how-to-create-helix#36703 Author: philippe JOSEPH
Subject: 13077
Posted: 24.Jan.2019 at 07:16

Hello dery, HELIX is comming with ACAD2007 so you will have to approximate your helix with multiple extrusions of regions along small arcs and then a copy or array to have a big/long one.
Place here some small example of extrusion that you want and we will give you some tutorial.
Maybe a "good" helix created with ACAD2007 or + can be "saved as" ACAD2002" or you could do the "save as" with your ACAD2012. 


Edited by philippe JOSEPH - 24.Jan.2019 at 07:19]]> Thu, 24 Jan 2019 07:16:18 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36703&title=how-to-create-helix#36703 <![CDATA[How to Create Helix? : Can someone please tell me how...]]> https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36702&title=how-to-create-helix#36702 Author: dery
Subject: 13077
Posted: 24.Jan.2019 at 01:42

Can someone please tell me how to create a helix in ACAD2002?

I asked this because there is no helix command in ACAD2002.
]]> Thu, 24 Jan 2019 01:42:13 +0000 https://www.cadforum.cz/forum_en/forum_posts.asp?TID=13077&PID=36702&title=how-to-create-helix#36702