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Problems snapping and extruding

Question asked by Gareth Wyatt on May 20, 2017
Latest reply on May 22, 2017 by Kevin Pymm

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ok so I've drawn a 2d sketch, I then try to end sketch and "Can not rebuild the feature using this sketch". I choose the show the problem using check sketch option. It then says the sketch has no contour geometry to try to fix.. press ok. So I click ok. Default gaps smaller then setting is 0.0241069 and there's no problems found. I raise this to 800mm and 1 problem alerts "a small entity". A line is circled in yellow in the centre of it. i zoom in all the way and there are no breaks in the line and it is joined at the ends properly. I don't know what to do!!! I'm teaching myself how to use solid works and it's very frustrating! I've tried redrawing it, opening new sheets, restarting it.. nothing! Also I can't get a circle to snap properly to a line. Even drawing a simple circle then drawing a line to end on the circle it snaps on but when I zoom in it's actually not toucing or its over lappin. If I then try to trim it the whole line disappears. Please I've literally spent hours trying to fix this.

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Solid Air May 21, 2017 9:24 AM

I understand your frustration. However, after you use SolidWorks for awhile, it will become easier.

Your pictures do not show the whole sketch or what type of feature you are trying to create. Please upload model you are working on errors and all.

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J. Mather May 21, 2017 10:29 AM

Attach your *.sldprt file here and end all doubt.

Are you using a phone to do (huge file size) screen captures?

You can use the built-in Windows Snipping Tool for this purpose.

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Gareth Wyatt May 21, 2017 2:05 PM

OK, I've added the fine hopefully it works. yeah i was taking the pictures on my phone, it was easier at the time. Thanks for the help in advance guys, its really not the easiest thing to teach myself without having someone i can quickly talk to whenever i don't understand something. Plus i'm not the most computer savvy guy at the best of times ha ha.

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Solid Air @ Gareth Wyatt on May 21, 2017 3:48 PM

Staying focused on your problem. I found nothing wrong with your sketch to prevent it from creating an extruded feature.

The first thing I noticed is that you were trying to do the extrude as a contour (the shaded 5 sided polygon with a hole in it next to Sketch 1 indicates the feature was made using contours .

I suppose this was because some of the sketch problems you described in your original post (SolidWorks defaults to using contours when it does not find a closed sketch) caused SolidWorks to try and make the feature using contours.

The reason, after you fixed your sketch, it did not extrude properly is because the contour was lost.

To get the extrude to work

Edit the Boss Extrude feature
Click in the Select Contours box (turns blue)
In the graphics area, select inside your sketch (inside turns what looks to me pink).
Click the green check to close the edit

Or if you do not want to use contours; delete the extrude feature and add a new one.

How you model is a matter of personal preference. Certainly keeping things simple when you are first learning is good advice as are the rest of the points J Mather makes. The only one I have issue with is adding fillets as separate features (my opinion). On simple sketches or models that have just one extrude, I would recommend putting them in the sketch. One more complicated models, I would recommend putting the fillets in as features. As I first stated, how you model is a personal preference. As you use it more you will find when it is better to model one way over another. How complicated you make you sketches depends on who will have to use them later. If it is you then no problem. If it is other users then take care you do not make your sketches so they are difficult to edit. And always fully define a sketch (lines and arcs turn black).

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Gareth Wyatt @ Solid Air on May 22, 2017 2:16 AM

i dont understand how to Edit the Boss Extrude feature. when i right click this comes up. seems like it wants me to end sketch but i cant?

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Kevin Pymm @ Gareth Wyatt on May 22, 2017 3:01 AM

Gareth,

You have rolled back your feature tree to before the extrude. Just drag the blue line back below the extrude & you will be able to edit it normally.

I found no issues with your sketch, I just deleted the old extrude (keeping the original sketch), redid the extrude using the base sketch, not contours, & the extrude worked as expected.

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J. Mather May 21, 2017 2:59 PM

You have a lot of symmetry in your file - I recommend making use of that symmetry about the Origin Center Point.

I recommend that you keep you sketches simple as a beginner.

More sketches - each one simple.

Add your Fillets as Features rather than Sketch Entities.

Missing several Tangent Constraints (and others).

As a beginner - I recommend that you fully constrain each line or arc immediately upon creation before continuing to next line or arc.

Use Construction Lines.

Examine each sketch in the attached one-by-one.

Examine each feature in the attached one-by-one.

Attachments

Simple Features.SLDPRT.zip142.2 KB
Simple Sketches.SLDPRT.zip56.9 KB

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Gareth Wyatt @ J. Mather on May 22, 2017 2:17 AM

that is a great idea, great for saving time.

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8 Replies

Solid Air May 21, 2017 9:24 AM
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I understand your frustration. However, after you use SolidWorks for awhile, it will become easier.

Your pictures do not show the whole sketch or what type of feature you are trying to create. Please upload model you are working on errors and all.
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J. Mather May 21, 2017 10:29 AM
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Attach your *.sldprt file here and end all doubt.

Are you using a phone to do (huge file size) screen captures?
You can use the built-in Windows Snipping Tool for this purpose.
Like • Show 1 Like1
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Gareth Wyatt May 21, 2017 2:05 PM
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OK, I've added the fine hopefully it works. yeah i was taking the pictures on my phone, it was easier at the time. Thanks for the help in advance guys, its really not the easiest thing to teach myself without having someone i can quickly talk to whenever i don't understand something. Plus i'm not the most computer savvy guy at the best of times ha ha.
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- Solid Air @ Gareth Wyatt on May 21, 2017 3:48 PM
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  Correct Answer
  Staying focused on your problem. I found nothing wrong with your sketch to prevent it from creating an extruded feature.
  
  The first thing I noticed is that you were trying to do the extrude as a contour (the shaded 5 sided polygon with a hole in it next to Sketch 1 indicates the feature was made using contours .
  
  I suppose this was because some of the sketch problems you described in your original post (SolidWorks defaults to using contours when it does not find a closed sketch) caused SolidWorks to try and make the feature using contours.
  
  The reason, after you fixed your sketch, it did not extrude properly is because the contour was lost.
  
  To get the extrude to work
  Edit the Boss Extrude feature
  Click in the Select Contours box (turns blue)
  In the graphics area, select inside your sketch (inside turns what looks to me pink).
  Click the green check to close the edit
  
  Or if you do not want to use contours; delete the extrude feature and add a new one.
  
  How you model is a matter of personal preference. Certainly keeping things simple when you are first learning is good advice as are the rest of the points J Mather makes. The only one I have issue with is adding fillets as separate features (my opinion). On simple sketches or models that have just one extrude, I would recommend putting them in the sketch. One more complicated models, I would recommend putting the fillets in as features. As I first stated, how you model is a personal preference. As you use it more you will find when it is better to model one way over another. How complicated you make you sketches depends on who will have to use them later. If it is you then no problem. If it is other users then take care you do not make your sketches so they are difficult to edit. And always fully define a sketch (lines and arcs turn black).
  Like • Show 1 Like1
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  - Gareth Wyatt @ Solid Air on May 22, 2017 2:16 AM
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    i dont understand how to Edit the Boss Extrude feature. when i right click this comes up. seems like it wants me to end sketch but i cant?
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    - Kevin Pymm @ Gareth Wyatt on May 22, 2017 3:01 AM
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      Correct Answer
      Gareth,
      You have rolled back your feature tree to before the extrude. Just drag the blue line back below the extrude & you will be able to edit it normally.
      I found no issues with your sketch, I just deleted the old extrude (keeping the original sketch), redid the extrude using the base sketch, not contours, & the extrude worked as expected.
      Like • Show 2 Likes2
      Actions
J. Mather May 21, 2017 2:59 PM
Mark Correct
Correct Answer
You have a lot of symmetry in your file - I recommend making use of that symmetry about the Origin Center Point.
I recommend that you keep you sketches simple as a beginner.
More sketches - each one simple.
Add your Fillets as Features rather than Sketch Entities.
Missing several Tangent Constraints (and others).
As a beginner - I recommend that you fully constrain each line or arc immediately upon creation before continuing to next line or arc.
Use Construction Lines.

Examine each sketch in the attached one-by-one.
Examine each feature in the attached one-by-one.
Attachments
- Simple Features.SLDPRT.zip142.2 KB
- Simple Sketches.SLDPRT.zip56.9 KB
Like • Show 3 Likes3
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- Gareth Wyatt @ J. Mather on May 22, 2017 2:17 AM
  Mark Correct
  Correct Answer
  that is a great idea, great for saving time.
  Like • Show 2 Likes2
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Problems snapping and extruding

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