1
$\begingroup$

I'm trying something fancier.. hopefully it will be clear from the screen-shot.. linear and circular patterns work. now, however, I'd like to spiral the cuts. first try isn't working.. it gave me an error at one point, but I didn't comprehend it, and it hasn't shown up again.enter image description here

here is a second screen-capture presenting the problem. I try to select the outside of the cylinder as the surface that the pattern should be normal to, and it doesn't work..enter image description here

partial solution: I tried the following (somewhat lame, it gave me no sound?) tutorial and this time it worked: https://www.youtube.com/watch?v=X9xSMBdqcr4 . two things I've learned: the first one.. is rather trivial but irks me for some reason. a helix can't be created from an existing sketch, you have to create a fresh sketch just for it. this seems.. wasteful of time and effort, particularly considering the second thing I've learned: in order for the curve driven pattern to work, the helical path -must- be on the surface to which the object to be patterned is to be normal... so the question would become, why is solidworks built this way. is there a reason for it, or is it just an oversight? :-)

$\endgroup$
11
  • $\begingroup$ Tried doing the lofts as unmerged solids rather than cuts, patterning the bodies, and doing a combine/subtract at the end? $\endgroup$ Feb 5 '20 at 6:54
  • $\begingroup$ You could always make this effect from a series of linear and circular, too. $\endgroup$ Feb 5 '20 at 9:17
  • $\begingroup$ @JonathanRSwift series of linear and circular? ... you really think that's possible? $\endgroup$
    – juggler
    Feb 5 '20 at 12:59
  • $\begingroup$ "Tried doing the lofts as unmerged solids rather than cuts, patterning the bodies, and doing a combine/subtract at the end?" -nope. I haven't. thanks for the thought! $\endgroup$
    – juggler
    Feb 5 '20 at 13:01
  • $\begingroup$ I only suggested it since you said that linear worked for you. You could do linear with a spacing equal to the pitch of the helix, Then circular, and then use the move/copy bodies command to raise the bodies up to the level of the helix (lift by fractional height of the helix pitch relative to the number of degrees rotated) - this is a very messy way, but it would work, and without having the file it's always hard to diagnose why your curve driven pattern (which is certainly a better method) isn't working. $\endgroup$ Feb 5 '20 at 13:02
2
$\begingroup$

I've pretty much answered this in the comments, but didn't want to hyperlink an image:

  • Make your loft into an un-merged solid, that can be used as a cut tool later.
  • Pattern bodies instead of features, this is always more reliable

Another thing to note - you can use the helix feature directly as your path, there's no need for a 3D sketch.

helix loft pattern

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.