AutoCAD 2010/2011/2012

AutoCAD 2010/2011/2012

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Member
kahmeng_tan
Posts: 5
Registered: ‎08-10-2011
Message 1 of 6 (1,571 Views)

Helix for spiral coils

1571 Views, 5 Replies
08-24-2011 10:31 PM

hi all,

 

I am trying to draw a flat spiral coil in 2D using the helix function but as soon as i use the 'flatten' command the coil becomes wiggly. is there a way to avoid this or do I have to use a different method to get a smooth spiral coil?

 

Perhaps I can increase the number of vertices so it looks smoother?

Thanks in advance.

 

Valued Mentor
parkr4st
Posts: 474
Registered: ‎03-24-2004
Message 2 of 6 (1,565 Views)

Re: Helix for spiral coils

08-25-2011 03:15 AM in reply to: kahmeng_tan

did you use a height of zero?

 

dave

Member
kahmeng_tan
Posts: 5
Registered: ‎08-10-2011
Message 3 of 6 (1,561 Views)

Re: Helix for spiral coils

08-25-2011 04:14 AM in reply to: kahmeng_tan
Yes i did. Just a slight update to the problem, i need actually to REDUCE the number of vertices as the laser machine im feeding into has a maximum number it can take. How do i do this?
*Expert Elite*
JDMather
Posts: 28,228
Registered: ‎04-20-2006
Message 4 of 6 (1,544 Views)

Re: Helix for spiral coils

08-26-2011 05:31 AM in reply to: kahmeng_tan

So let me get this straight.
You did use height of 0 to get a spiral (not a helix).

You are using Flattten to convert the spline curve to arcs for g-code?

 

If this is what you are doing I have the solution around on how to control the number of arcs, but before trying to dig deep I want to make sure of the problem description.

Please mark this response as "Accept as Solution" if it answers your question.
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vladimir.michl
Posts: 263
Registered: ‎09-17-2006
Message 5 of 6 (1,526 Views)

Re: Helix for spiral coils

08-28-2011 09:35 AM in reply to: JDMather

Or use the old "pre-HELIX" method - the SPIRAL command from the 3DSPIRAL AutoLISP utility. See:

http://www.cadstudio.cz/download?file=Spiral

 

Vladimir Michl, http://www.cadforum.cz

 


Member
kahmeng_tan
Posts: 5
Registered: ‎08-10-2011
Message 6 of 6 (1,521 Views)

Re: Helix for spiral coils

08-28-2011 03:59 PM in reply to: JDMather

Yes I used the helix command, specified inner and outer radius, used 0 as the height, and flatten to convert into a polyline.

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