How to make spiral in Autocad 2004?i want to create simple spiral ladder. 
xrayrays2012-04-26 09:01:55

A simple Google search would have lead you right back to this CADforum site:http://www.cadforum.cz/cadforum_en/qaID.asp?tip=835Google is your friend.  Learn to use it.  And also look at the Tips: section right below this message!  They're related to your Subject line.Dave.


heinsite2012-04-26 09:18:56

thanks dave,I also search some slp but they don't put some instruction on how to use it.btw dave, how to use the spiral.slp?
xrayrays2012-04-26 09:27:27

Hello, search "SPIRAL LADDER DWG" in Google.

Look at the bottom of this page... Tip 835.  It tells you.  You download the .lsp (LISP) file.  Then you use the APPLOAD command to load it.  Then you run it like any other command by typing SPIRAL on the command line.Dave.


heinsite2012-04-26 09:39:06

thanks again. 

You have to load the 2 lsp files : 3DSPIRAL.lsp AND SOL_SPRING.lsp.
Then you launch the command 3DSPIRAL to create the centerline of your spiral with the dimensions asked by AutoCAD, then you launch the command SOL_SPRING to create your 3D volume with the dimensions asked by AutoCAD.
It's possible to create a modifiable spiral with the command HELIX by openning the properties panel.
On that helix you can use the command EXTRUDE to create your volume along the path defined by the  helix ( that 3D volume is not modifiable with the properties panel ).
Ask form more.

its not 3d, its 2d

Create the 3D spiral specifying the base and top radius.  However, when it comes to height make this "0" which should give you a flat 2D spiral.

if not flat?

I have no idea what "if not flat" means.  If the height is given as "0" of course its flat!  You're creating a spiral not a helix.

i think helix i need.

Hello N° 3
If you are using HELIX in a 2D drawing, beware of not creating a 3D HELIX.
In the properties panel you've got access to 10 modifiable values.
Position X ........
Position Y .......
Position Z 0  ---> must be zero
Constrain your choise between 3
Height 0 ---> must be zero
Turns ---> your choise
Height of turns 0 ---> must be zero
Base radius ---> your choise
Top radius ---> your choise
XXXXX ( I don't know in english ) trigo or time direction
( excuse me for the terms in french to english )
 
Please let us know if it helped and if possible let us see your DWG, I'm interested.

You're drawing a 2D spiral which means there is NO height!  Which is why I told you to use a value of "0".A helix with a different radius for the base and the top will produce a spiral.  If the radii for both is the same then you won't get the desired result.

This is what you are looking to achieve right?http://en.wikipedia.org/wiki/File:Archimedean_spiral.svg

i only havecenter point:number of rotations:Growth per rotations:Points per rotation <30>:thats the command in my spiral.slp

Guess what?  That is not going to give you what you want.What is your base radius?What is your top radius?How many turns do you want?

I Enter thiscenter pointnumber of rotations:5 Growth per rotations: 10 Points per rotation <30>: 90its flat spiral.hmp, how do i fix to not flat.

You have a habit of not answering questions put directly to you.  I did NOT ask what spiral.lsp was requesting for input.Please answer MY questions.