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Helix - tutorial (by mantielero)
I am experimenting with the Helix functionality and it is quite difficult to me.

It looks like you can modify the height and the number of turns manually. You can constrain the height, but I didn't find a way to constrain the number of turns or the angle between both extreme faces.

Is there any function that I am missing? Could this be improved?

Regards
Sun Feb 5 2023, 04:17:15
(no subject) (by Andrew)
There is a length per turn option for the helix, click the checkbox and you can then set the length per turn, that is pitch.
Sun Feb 5 2023, 08:39:51
(no subject) (by Paul)
If you manually get the number of turn right, you should be able to constrain some lines perpendicular, or a point-on-face to lock the angle. The development version also hase faces-perpendicular constrain.

But probably the best is to set the pitch in the text window for that group.
Sun Feb 5 2023, 11:32:16
(no subject) (by mantielero)
Thanks a lot. Now I understand how it works.
Tue Feb 7 2023, 16:17:40
(no subject) (by al-vo)
Is it possible to set the spiral to rotate to the left?
Tue Feb 7 2023, 23:59:03
(no subject) (by Andrew)
Yes, just drag the top to reverse the rotation, best done before setting length amd pitch.
Wed Feb 8 2023, 06:47:55
(no subject) (by al-vo)
"At the left-hand thread, if you look at the screw or nut from the end, the turns go to the left. You can screw the nut onto a screw with a left-hand thread by turning it counterclockwise."
I don't understand how this can be done from your answer. Can you post a simple example? Thank you in advance.
Wed Feb 8 2023, 20:59:18
(no subject) (by al-vo)
Explanations for the previous comment.
The attached picture shows the springs: right (I) and left (II).
How to make a left winding of a spring in Solvespace?
Thu Feb 9 2023, 05:06:40, download attachment R-L.jpg
(no subject) (by Andrew)
When you create the helix, you will have one or more points on the extruded end of the section, by orientating the drawing to look down the axis, one of those points can be grabbed and dragged round the axis, in the direction you want it to turn,. alternatively use a negative rotation per turn value.
Thu Feb 9 2023, 06:50:41
(no subject) (by al-vo)
Andrew, thanks. Understood.
Fri Feb 10 2023, 02:44:09
(no subject) (by app4soft)
> > Is it possible to set the spiral to rotate to the left?

> Yes, just drag the top to reverse the rotation, best done before setting length and pitch.

If set "fixed" pitch, its possible change rotation direction just by input "-" (minus) before value in "pitch - length per turn" .
Sun Feb 12 2023, 01:16:11
An helix Example, Sodastream PET to Glass Adapter (by Walter Cadek)
hello mantielero,
I agree, that an example best helps understand how it works.
Here there is my adapter with 2 threads, one inner Glass thread,
the second a PET outer thread, with 2 rails 180° in opposition.
Sun Feb 12 2023, 14:48:01, download attachment GL_36_S38_Adapter.slvs
(no subject) (by Paul)
@Walter Cadek

By making some of the lines in the last 2d sketch construction lines, and making an additional non-construction line on each thread I was able to use Union on the last helix group. This is alway preferable to using Assemble for geometry that should be attached in a single part. See the attached file.

Coincident surfaces fail easier, particularly curved coincident surfaces. Also a helix where consecutive turns touch each other is likely to cause problems.
Tue Feb 14 2023, 17:09:59, download attachment GL_36_S38_Adapter2.slvs
(no subject) (by Walter Cadek)
Thank you,
now i know how to prevent the red markings
when exporting the triangle mesh.

Thats exaktly what helped me designing perfect objects.
Fri Feb 17 2023, 14:30:08
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