This is a very easy challenge, so there will be only 1 (one) 5,000 point prize.

To win it, find the simplest, most elegant solution (yeah, I know, it is a subjective criterion) to this problem:

Remove the slit from the attached file.

Speed is not essential to winning this challenge.

Please submit your entries before Friday, the 17th of November, 5 pm ET.

Categories: Modeling and Assemblies, Surfacing

Last comment By: Erik Bilello   Wed, 29 Nov 2017 13:11:59 GMT
The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

This is a very easy challenge, so there will be only 1 (one) 5,000 point prize.

To win it, find the simplest, most elegant solution (yeah, I know, it is a subjective criterion) to this problem:

Remove the slit from the attached file.

Speed is not essential to winning this challenge.

Please submit your entries before Friday, the 17th of November, 5 pm ET.

By: Alin Vargatu  Tue, 14 Nov 2017 20:37:13 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Newell Voss wrote:

no attachment

By: Alin Vargatu  Tue, 14 Nov 2017 20:41:20 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

how do i attach a file

By: Tom Putt  Tue, 14 Nov 2017 20:52:15 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Alin,

I can't get the file either.  They may have changed our firewall to not allow zip files.  Can you check by downloading it?

By: Matt Peneguy  Tue, 14 Nov 2017 20:53:02 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

got it. not sure if the surface lines are factored in, its clean, but I think it can be done in fewer steps.

By: Newell Voss  Tue, 14 Nov 2017 20:55:31 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Strange. I can download it without any problem. Jive automatically zips any file.

By: Alin Vargatu  Tue, 14 Nov 2017 20:56:00 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

use the advanced editor option and look for the attachment clip icon in the lower right corner.

By: Newell Voss  Tue, 14 Nov 2017 20:56:17 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Newell Voss wrote:

got it. not sure if the surface lines are factored in, its clean, but I think it can be done in fewer steps.

Thanks, Newell. I like they way you think about further simplifying this solution.

By: Alin Vargatu  Tue, 14 Nov 2017 20:57:29 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

here is my submission

By: Tom Putt  Tue, 14 Nov 2017 20:57:55 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Alin,

For whatever reason I can get the file now.  It may have been a glitch on my side.  But, it's strange someone else had the same problem.

By: Matt Peneguy  Tue, 14 Nov 2017 20:58:14 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Tom Putt wrote:

here is my submission

Thanks Tom! Can you further simplify it?

By: Alin Vargatu  Tue, 14 Nov 2017 20:59:00 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

let me take a look at it tomorrow and i will get back to ya

By: Tom Putt  Tue, 14 Nov 2017 20:59:43 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

I would like to submit a new model if possible. drastically more "elegant" than my first attempt.

By: Newell Voss  Tue, 14 Nov 2017 21:09:44 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Newell Voss wrote:

I would like to submit a new model if possible. drastically more "elegant" than my first attempt.

No worries. You can submit as many as you want before the deadline.

By: Alin Vargatu  Tue, 14 Nov 2017 21:17:44 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Here's my "quick & dirty" approach . . .

todd

By: Todd Blacksher  Tue, 14 Nov 2017 21:36:34 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Alin

Thanks for the challenge, I learned a bunch. Now to look at the other solutions submitted . . .

Dwight

By: Dwight Livingston  Tue, 14 Nov 2017 22:24:51 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Here is one

By: Ingvar Magnusson  Tue, 14 Nov 2017 22:24:11 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Very nice solutions, so far. Good job, everyone.

It is time for a second suggestion: think about reverse engineering the model. SOLIDWORKS has dedicated tools for reverse engineering.

By: Alin Vargatu  Wed, 15 Nov 2017 00:32:48 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Here's my submission!

By: Vahid Mostofi  Wed, 15 Nov 2017 01:08:37 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Here's my solution, can't open anything over SW2015 so not sure if this one has been tried yet.

**Edit - note the curvature and zebra stripes on this model are very clean.

By: Duncan Gillis  Wed, 15 Nov 2017 01:30:56 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Okay, so here is my first ever submission in one of these challenges!

Probably not the most professional way to do it, but it's done nonetheless. At the very least it'll probably give most other people a laugh!

Dave.

By: Dave Bear  Wed, 15 Nov 2017 02:16:34 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Keep it Simple!

By: Michael Lord  Wed, 15 Nov 2017 03:33:56 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Yep, that's pretty simple!!! definitely 'reverse' engineered that!

By: Duncan Gillis  Wed, 15 Nov 2017 03:41:12 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Duncan Gillis  Not smart enough for all that Surfacing & Boundary stuff

By: Michael Lord  Wed, 15 Nov 2017 03:51:30 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Hi Alin,

Interesting challenge.

By: Mark Biasotti  Wed, 15 Nov 2017 04:52:14 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Hi,

This is the first time I am participating in any SWX competition.

Model attached.

By: Swapnil Dhake  Wed, 15 Nov 2017 05:47:23 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Hi.

Here is my quick submission.

Some assumptions are made. 1. Model can be symmetrical to the front plane. 2. Is made from 3 operations: Surface revolve, surface trim, thicken.

By: Krzysztof W.  Wed, 15 Nov 2017 07:51:05 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Here is my submission.

By: Tateos Tvapanyan  Wed, 15 Nov 2017 08:36:03 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Alin,

Here's my attempt at this challenge.

By: Kevin Pymm  Wed, 15 Nov 2017 09:28:34 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

## first try

By: Çağın Gergin  Wed, 15 Nov 2017 10:10:41 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Two features, and the old geometry is still there for verification.

By: Jim Sculley  Wed, 15 Nov 2017 13:36:47 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

He, here is my solution.

By: Jonan Van Asperen  Wed, 15 Nov 2017 13:00:03 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Here's my shot at it.

By: Tony Cantrell  Wed, 15 Nov 2017 13:58:00 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

I first looked into this method. but if you look closely at the end condition the tangency is lost in the top face.

By: Newell Voss  Wed, 15 Nov 2017 14:23:38 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

OK, her is submission #1.

I just use boundary surfaces to fill the gap...not pretty, but it got the job done.

SW 2015 SP5

By: Dan Pihlaja  Wed, 15 Nov 2017 14:25:10 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

And here is my submission # 2.  I thought of this after I finished the first one.  So I tried it out and it worked pretty well.  Looks just like the one on the right in your picture:

I created some comments to explain the steps.

By: Dan Pihlaja  Wed, 15 Nov 2017 14:44:21 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

I couldn't get the solid boundary feature to work for me at all with this.  I did it using surface boundaries in my first attempt....but the lines show up.  As for the solid boundary feature, it either kept error-ing out for me or created extra bodies that I didn't want.

Must be a SW 2015.....or a Dan thing.  LOL

By: Dan Pihlaja  Wed, 15 Nov 2017 14:47:07 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

And here is my third submission.....same basic principle as # 2 for me, but a little more simplified.

By: Dan Pihlaja  Wed, 15 Nov 2017 15:01:43 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

does it matter if the part is a solid or surface?

By: Tom Putt  Wed, 15 Nov 2017 15:21:36 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

This is what I did.

By: Tom dunn  Wed, 15 Nov 2017 16:54:10 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

By: Siavash Khajehhasani  Wed, 15 Nov 2017 17:17:19 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Siavash Khajehhasani wrote:

OK, holy crap.....I didn't even know that the move face command could be used to do that!

I am thoroughly impressed.   I just tried it myself....and that is amazing!!

Thanks for showing that to us Siavash!!!!

Just.....wow.

By: Dan Pihlaja  Wed, 15 Nov 2017 17:25:27 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

see my original reply to Jonan. Move face is a powerful tool but in this application it does not yield the desired result. Attention to detail is necessary when using that sort of feature.

By: Newell Voss  Wed, 15 Nov 2017 17:31:30 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Yes, you are correct.  I see it now.

By: Dan Pihlaja  Wed, 15 Nov 2017 17:45:05 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

here is my latest. Tom

By: Tom dunn  Wed, 15 Nov 2017 19:05:37 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Loving all the different ways!!

My first thought was the cut with surface/mirror approach, but then I thought I'd try something different.  Wondering why the part was hovering above the top plane, I worked out that extruding a 100mm circular surface with 7.5 draught was about right followed by a thicken.  I got the end cuts (surface trim before thicken) from the original geometry.

EDIT: oops just noticed this is incorrect.. a combine subtract leaves extra

By: Rob Edwards  Wed, 15 Nov 2017 18:37:47 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Michael Lord wrote:

Keep it Simple!

By: Ingvar Magnusson  Wed, 15 Nov 2017 19:09:02 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Apologies for being daft, I looked in the scrap bin and found the missing piece :/

By: Rob Edwards  Wed, 15 Nov 2017 19:12:57 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Hi Alin,

Here are my two methods.

By: Ravi Teja  Wed, 15 Nov 2017 19:48:13 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Newell,

You may be right. I just placed the aforementioned method based on the problem description which was "Remove the slit from the attached file". Furthermore, the move face solution is being used earlier by Jonan Van Asperen. I just reduced one feature (axis).

Cheers,

Siavash

By: Siavash Khajehhasani  Wed, 15 Nov 2017 18:22:58 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Alin,

Here is my attempt for simplicity. The cut make for clean healing on the move face as does selecting both of the cut surfaces. This eliminates the little step on the top.

By: Dave Dinius  Wed, 15 Nov 2017 21:31:23 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

I like the way you think!

By: Michael Lord  Thu, 16 Nov 2017 02:22:37 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Yulp - that's the ticket!

By: Mark Biasotti  Thu, 16 Nov 2017 02:50:55 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Worth a look at 'curvature' in the evaluate functions if you used boundary surface or loft. Loft looks to give better results fixing tangent to faces, boundary looks not so perfect.

By: Richard Gergely  Thu, 16 Nov 2017 03:15:04 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Newell,

Thanks for pointing that out.  I would have probably overlooked those little edges too.  See if this sorts it out. I can't spot any loose edges, but I havn't taken the time to do a full on geometry analysis just yet.

I'm in the middle of a project in SW'16 just now, but when I have a chance to close it up I'll open SW'18 and have a look at yours and some of the others. At which point I'll probably discover that, like the move face "trick" others have already figured this out too.

By: Erik Bilello  Thu, 16 Nov 2017 06:47:58 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

I did this before looking at the other submissions. I obviously will learn from the others!

By: Bill Toft  Fri, 17 Nov 2017 02:34:09 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

By knowing the part is symmetric accomplished e.g. by feature recognition, here comes one.

By: Ingvar Magnusson  Fri, 17 Nov 2017 15:46:06 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Please accept my apologies for the delay in announcing the winner. I am travelling, but I hope to get a chance to open all your submissions tonight, or tomorrow night.

Hopefully the hotel's internet will be good enough.

Will launch the next challenge as soon as we wrap-up this one.

By: Alin Vargatu  Mon, 27 Nov 2017 17:53:02 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Alin,

First of all let me thank you for all the efforts and time you put on these weekly power user series.

I've learned much more from them than any other sources.

When I open one of the subscriptions and think this is the best way to do it, there always comes another power user with a completely different way which blows my mind. I wonder how he can think of this method....

In most cases, participants have several subscriptions with different methods.

And when the winner is announced it's hard (for me) to find which subscription has won.

I know you're too busy, but if possible, a link to the post or the download file for each winner makes it much simpler to track the best solution.

Once again thanks for all you put on this forum.

By: Habib Ghalamkari  Mon, 27 Nov 2017 23:54:53 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

OK, we got 34 submissions this time...

By: Alin Vargatu  Tue, 28 Nov 2017 02:48:34 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Will announce winner(s) tomorrow. Good night!

By: Alin Vargatu  Tue, 28 Nov 2017 04:02:35 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Hi Alin,

Thanks a lot! I honestly wasn't confident of my solution, exactly because of your question about symmetry. I couldn't technically prove the part is symmetrical (I knew it was, but I didn't have a good proof ). To answer your question, after some attempts, I just got more familiar with the part and saw some signs that made me think this part might be symmetrical after all, like how the highlighted edges arranged on top surface, but most importantly, when I looked at the part from side (or normal to front plane) I saw the edges from the far side perfectly matches the profile of the near side (green edge), now I was more confident it's symmetrical. I think I could create a copy of the imported body and overlap it with my solution to confirm it even more, but I did not think of this at that time.

By: Vahid Mostofi  Wed, 29 Nov 2017 04:59:31 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Update: I learned a lot from this challenge! If you have the patience to watch this video: Restricted WPUC13 Brainstorming - YouTube, you could see how confused I am at this late hour.

So far, I learned that while faces remember their original patch of fabric from which they were trimmed, edges do not necessarily do. Faces have better memory than edges!

I would appreciate any comments, suggestions or questions. Let's keep the brainstorming going...

------------------------

Thanks to all participants to the 13th SOLIDWORKS User Challenge! We receive 34 different high quality solutions to this problem, which might be a record for the year.

Many thanks to our sponsors: Dan Pihlaja, John Stoltzfus and Jim Steinmeyer!!!

I made a basic mistake in defining the challenge, which is ignoring the fact that the original part was symmetrical in regards to one of the major planes. That opened the door for several of the contestants to submit very elegant solutions, taking advantage of this symmetry.

I cannot ignore such solutions, so I will award 5,000 points to Vahid Mostofi for being the first to submit a solution based on the symmetry condition in the part. Great job, Vahid!!! I am curious, how did you determine that the original part was actually symmetrical.

Most of the entries demonstrated advanced surfacing skills. Boundary, Loft, Fill, Untrim, Trim, and other surfacing tools were used to great effect for filling the missing faces. I am really impressed how resourceful you are in getting the job done.

The solutions I enjoyed the most where the ones based on reverse engineering the model, using the fabric of the original surface patches. As you might know, the original "fabric" from which a faced is trimmed is preserved in the background. For me, the biggest lesson I learned from this challenge, is that the preservation is not 100% precise, under certain conditions. Many of you noticed the little step left by the Move Face command. That was a big surprise!

When the step is removed by a Delete Face or Untrim and Replace Face, the tangency on that edge is lost.

Tools that are great for reverse engineering are: Untrim, Extend (Same Surface option, up to the original patch boundary), Move Face, Intersect, Delete Face (with Patch), Delete Hole, Face Curves and maybe a few more.

Many of you used reverse engineering techniques: Mark Biasotti, Jonan Van Asperen, Erik Bilello, Siavash Khajehhasani, Dave Dinius and more. The interesting aspect is that even these solutions were unique. For example Mark switched direction in the middle of the feature tree, moving from using a reverse engineering workflow to a symmetry/ mirroring solution. Take a look at his model, there are lots of lessons for some of us there.

It was really hard to pick the other winners in this challenge, because I had to ignore the slight loss of tangency, or topology change, but I like the potential for those techniques so much, that I will award 2,500 points to both Jonan Van Asperen and Erik Bilello.

All three winners, will receive SOLIDWORKS Power-User Certificates.

BTW, do you know anyone interested in designing these certificates?

By: Alin Vargatu  Wed, 29 Nov 2017 03:04:24 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Congratulations Vahid, Jonan and Erik.

Exceptional work as always Alin, thank you for your efforts.

Dave.

By: Dave Bear  Wed, 29 Nov 2017 10:46:17 GMT
Re: The 13th SOLIDWORKS Power-User Challenge - Remove the Slit from the Thin Part (Heal the Part)

Alin,

I got home and checked my inbox to discover that I'd been mentioned by you, and received a badge and certificate from you.  Thank you for the recognition, and more importantly, thank you for concocting these challenges and finding the time to review and evaluate our efforts.

I have to admit my original goal was to try (I'm still occasionally trying) to get the Import Diagnostics tool to fix the gap, or at least tweak the imported solid in a way that would allow a quick fix with minimal features. I stumbled on to the Move Face solution and was not actually too surprised to find that Jonan Van Asperen had already posted it.  Fortunately I then saw Newell Voss's post and so took another look at the problem.

As for the certificate design, maybe that could be the next challenge. Model the Spirograph (Spirograph - Wikipedia) you had when you were a kid (bonus if you make the molded storage box too) and then use it to make a curlicue border.

Thank you again for the time and work you put into all this.  Now I'll have a look at that brainstorming video.

Erik,

By: Erik Bilello  Wed, 29 Nov 2017 13:11:59 GMT