# Chamfer and "no blend" error

**URL:** <https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453>\
**Category:** Modeling Questions\
**Created:** [June 19, 2025, 3:17pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453 "2025-06-19T15:17:21Z")\
**Posts on this page:** 20\
**Page:** 1

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**Author:** ![msibleyj](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/msibleyj/32/29845_2.png) [@msibleyj](https://discourse.shapr3d.com/u/msibleyj)\
**Post date:** [June 19, 2025, 3:17pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/1 "2025-06-19T15:17:21Z")

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I have this model I’ve created for 3D printing, which printed just fine (Image 1). Before printing I chamfered most of the edges to make them smooth. But when I tried to taper the end by moving the edge shown in Image 2 (red arrow) the whole side does not taper because of a segment depicted by the orange and red arrows on Image 3 between the blue and purple areas. Furthermore, when I try to chamfer the edge above the red arrow in Image 3 between the blue and green areas, I get an error message (“adjoining edge not blended”) unless I first chamfer the bottom portion of the edge (below the red arrow on Image 3 between the purple and green areas). It appears that the sections on the back (blue and purple) are not continuous, somehow and it keeps the edge between the purple and greens area from tapering. Included is the Shapr3D file. Any ideas for how to join the blue and purple segments, or whatever needs to be changed, so I can have a continuous taper, would be greatly appreciated.

Mark

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/2/2/22b562a10582508139aac296c194659645798b48.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/d/2/d2bbd0273e836e6d9ddf39fa6b85ecc317fd65ee.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/7/c/7cdcd5ebb02caa13efbe018d5b6dbb9d6b64489f.png)  
[Ironing Board Hanger Hook 08 (1).shapr](https://discourse.shapr3d.com/uploads/short-url/7WQ0PCgMUGOQ4mLvkKMK5Y8srLy.shapr) (1.7 MB)

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**Author:** ![jean-philippe2](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/jean-philippe2/32/27353_2.png) [@jean-philippe2](https://discourse.shapr3d.com/u/jean-philippe2)\
**Post date:** [June 19, 2025, 4:05pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/2 "2025-06-19T16:05:24Z")

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Hi,  
Select the edge and delete it.

 ![Capture d’écran 2025-06-19 à 18.02.34](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/d/8/d802d198816d3a6a6768674bce0dc7383df4bcb2.jpeg)

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**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [June 19, 2025, 7:33pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/3 "2025-06-19T19:33:38Z")

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I wouldn’t use move tool this way in that case. But if you really want you can use spline instead of arc and line in your sketch. That will give you smooth transition after moving the edge.

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/d/c/dc3dfd10e93aa88530455724a6c12e347dbb1719.jpeg)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/8/4/84570e68e9d82b4cd63d24b3583c92fa75d295a0.png)

As a result no problems with filets

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/5/5/55d62892130ca54af5130b9823666489a9ae94e4.jpeg)

[Ironing Board Hanger Hook.step](https://discourse.shapr3d.com/uploads/short-url/mtqkw9bxPaDCKHfw462dotM9kdJ.step) (72.0 KB)

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<div class="post-metadata">

**Author:** ![msibleyj](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/msibleyj/32/29845_2.png) [@msibleyj](https://discourse.shapr3d.com/u/msibleyj)\
**Post date:** [June 19, 2025, 9:11pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/4 "2025-06-19T21:11:33Z")

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Hi, thanks for responding so quickly! I tried several times to select and delete the edge, but nothing happens with I hit DELETE. I tried it on my iPad and PC. If I select the face (purple) I can delete it and the whole side (blue) is continuous, but lacking in the straight edge at the bottom.

Mark

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<div class="post-metadata">

**Author:** ![msibleyj](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/msibleyj/32/29845_2.png) [@msibleyj](https://discourse.shapr3d.com/u/msibleyj)\
**Post date:** [June 19, 2025, 10:17pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/5 "2025-06-19T22:17:27Z")

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I’m trying my hand with the spline tool but it’s a challenge getting a completely smooth outline that doesn’t create edges when I extrude it. My hat’s off to your skill with the tool! I’m trying to replicate it. Which spline setting did you use?

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<div class="post-metadata">

**Author:** ![Xdrakosha](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/xdrakosha/32/24881_2.png) [@Xdrakosha](https://discourse.shapr3d.com/u/Xdrakosha)\
**Post date:** [June 19, 2025, 10:25pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/6 "2025-06-19T22:25:31Z")

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> [@msibleyj](#):
>
> Which spline setting did you use?

Most of the time, I use a control spline. I always try to use as few points as possible. It’s not that hard — just takes a bit of practice 🙂

Practice some simple staff first, like this example I did for someone here

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/3/8/38f2d923ac07d7f7ac944875b11e1f0224feb468.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/5/9/59aeb1989b4460096111acc40accda5ccd1bc8b4.png)

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<div class="post-metadata">

**Author:** ![jean-philippe2](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/jean-philippe2/32/27353_2.png) [@jean-philippe2](https://discourse.shapr3d.com/u/jean-philippe2)\
**Post date:** [June 20, 2025, 7:32am UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/7 "2025-06-20T07:32:39Z")

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Hi,  
You can also use Tool \> Replace Face  
see video

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<div class="post-metadata">

**Author:** ![jean-philippe2](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/jean-philippe2/32/27353_2.png) [@jean-philippe2](https://discourse.shapr3d.com/u/jean-philippe2)\
**Post date:** [June 20, 2025, 8:03am UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/8 "2025-06-20T08:03:28Z")

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Hi,  
But I think the cleanest thing would be to redo the sketch.

 ![Capture d’écran 2025-06-20 à 10.01.24](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/d/4/d4b04ed588e73a8759cfdb58f034dc126c44c713.jpeg)

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<div class="post-metadata">

**Author:** ![BKE](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/bke/32/31690_2.png) [@BKE](https://discourse.shapr3d.com/u/BKE)\
**Post date:** [June 20, 2025, 1:14pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/9 "2025-06-20T13:14:40Z")

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(Absolutely _not_ quoting or replying to Alex 🙂

Some few points.

 ![Screenshot 2025-06-20 at 15.11.52](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/1/8/183cd9871b8714027999775cf21a1970327d2827.jpeg)

Uppdate: I will make a short demo later tonight.

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<div class="post-metadata">

**Author:** ![msibleyj](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/msibleyj/32/29845_2.png) [@msibleyj](https://discourse.shapr3d.com/u/msibleyj)\
**Post date:** [June 20, 2025, 1:50pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/10 "2025-06-20T13:50:05Z")

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OK, you just blew my mind!!

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<div class="post-metadata">

**Author:** ![msibleyj](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/msibleyj/32/29845_2.png) [@msibleyj](https://discourse.shapr3d.com/u/msibleyj)\
**Post date:** [June 20, 2025, 1:53pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/11 "2025-06-20T13:53:16Z")

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BKE, what?!! That is amazing! I don’t even know where to start. Any chance you could make a video of you doing this? Or point me to a good YouTube?

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<div class="post-metadata">

**Author:** ![msibleyj](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/msibleyj/32/29845_2.png) [@msibleyj](https://discourse.shapr3d.com/u/msibleyj)\
**Post date:** [June 20, 2025, 1:57pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/12 "2025-06-20T13:57:44Z")

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Xdrakosha, that is a work of art!

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<div class="post-metadata">

**Author:** ![msibleyj](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/msibleyj/32/29845_2.png) [@msibleyj](https://discourse.shapr3d.com/u/msibleyj)\
**Post date:** [June 20, 2025, 3:56pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/13 "2025-06-20T15:56:28Z")

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OK, I managed to recreate the design using Jean-Philippe2’s suggestion of the circles and lines. With a little modification to extend the base and add the cleat, it turned out pretty well. Will print to see how it works. **Thanks SO MUCH for all the suggestions!** ❤

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/d/2/d26aef4904877daf3435ecb005e4fe2643276d2d.png)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/0/9/097620749530fb9e7a3f0221325be5cf12246459.png)  
[New Hook 02.shapr](https://discourse.shapr3d.com/uploads/short-url/86teag7eInK7KIP36D2nNskzE8D.shapr) (162.4 KB)

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<div class="post-metadata">

**Author:** ![BKE](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/bke/32/31690_2.png) [@BKE](https://discourse.shapr3d.com/u/BKE)\
**Post date:** [June 20, 2025, 8:50pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/14 "2025-06-20T20:50:07Z")

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This is one way to work with bézier (splines) curves, IMHO  
Update; of course Kyun Kim SCALEMODEL is correct, this is a (B-)spline (Control) nothing else!

Encountered bézier curves first time 1986 with a prerelease of illustrator 1.0. Worked intensively years after with bézier both in Illustrator and designing fonts in Fontographer. (OT; fonts where a mess back then, encrypted with key disks! This until John Warnock released all ADOBE fonts in SF MacWorld [I was there - chaos].)

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<div class="post-metadata">

**Author:** ![msibleyj](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/msibleyj/32/29845_2.png) [@msibleyj](https://discourse.shapr3d.com/u/msibleyj)\
**Post date:** [June 20, 2025, 9:18pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/15 "2025-06-20T21:18:28Z")

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BKE, Holy Cow! I must say that when the video first started, I was thinking Where’s he going with this? And then, the hand of a master began to become apparent. I’m thankful that you took the time to make the video. I’m taken with this tool and will be trying to learn enough to make good use of it. And, thanks for the historical notes; fascinating!

Mark

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**Author:** ![SCALEMODEL](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@SCALEMODEL](https://discourse.shapr3d.com/u/SCALEMODEL)\
**Post date:** [June 20, 2025, 10:09pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/16 "2025-06-20T22:09:08Z")

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So are you saying Control Splines are Bezier Curves?

I call it B-Splines (oh B not for Bezier) or Nurbs.

Got into that here because of export issues.

> [@SVG Export results in a bunch of straight lines](https://discourse.shapr3d.com/t/svg-export-results-in-a-bunch-of-straight-lines/38431/15):
>
> That Control Spline issue looks like what the Original Poster was encountering. I kinda know why, Control Splines are NURBS Curve. Fit Spline is more like Bezier Curve. AI and Affinity Designer don’t have built in NURBS Curve so it looks like it’s converting it to segmented curves with high resolution. So as far as I know only software that can convert Control Spline Correctly is RHINO to PDF. If others have better conversion method, please post.

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<div class="post-metadata">

**Author:** ![BKE](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/bke/32/31690_2.png) [@BKE](https://discourse.shapr3d.com/u/BKE)\
**Post date:** [June 20, 2025, 10:54pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/17 "2025-06-20T22:54:43Z")

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Well, splines, bézier curves, NURBs, B-Splines, etc is kind of a messy nomenclature. All diffs somewhat.

> **[Bézier curve](https://en.wikipedia.org/wiki/B%C3%A9zier_curve)**
>
> A Bézier curve (/ˈbɛz.i.eɪ/ BEH-zee-ay, .mw-parser-output .IPA-label-small{font-size:85%}.mw-parser-output .references .IPA-label-small,.mw-parser-output .infobox .IPA-label-small,.mw-parser-output .navbox .IPA-label-small{font-size:100%}French pronunciation: \[bezje\]) is a parametric curve used in computer graphics and related fields. A set of discrete "control points" defines a smooth, continuous curve by means of a formula. Usually the curve is intended to approximate a real-world shape t In ve...

> **[Difference between Spline, B-Spline and Bezier Curves - GeeksforGeeks](https://www.geeksforgeeks.org/engineering-mathematics/difference-between-spline-b-spline-and-bezier-curves/)**
>
> Your All-in-One Learning Portal: GeeksforGeeks is a comprehensive educational platform that empowers learners across domains-spanning computer science and programming, school education, upskilling, commerce, software tools, competitive exams, and...

I personally adopt to whatever, most of the basic ‘feel’ is to be easily assimilated 🙂

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<div class="post-metadata">

**Author:** ![SCALEMODEL](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@SCALEMODEL](https://discourse.shapr3d.com/u/SCALEMODEL)\
**Post date:** [June 20, 2025, 11:00pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/18 "2025-06-20T23:00:37Z")

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> [@BKE](#):
>
> I personally adopt to whatever, most of the basic ‘feel’ is to be easily assimilated 🙂

Sure thats what I thought, I mostly work in Fit Curve now that I realize. Control Spline can’t be transfered over to Illustrator or Affinity Designer, my point is if it is Bezier it should transfer correctly, or just limitation in Shapr3d?

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<div class="post-metadata">

**Author:** ![BKE](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/bke/32/31690_2.png) [@BKE](https://discourse.shapr3d.com/u/BKE)\
**Post date:** [June 20, 2025, 11:35pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/19 "2025-06-20T23:35:32Z")

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Spline fit example

Harder to get get curves interleaved (in ‘tangent’). More granulate basic unforgiving Bézier though.  
(One user tip; set (to) many ctrl-point, and then reduce, better thatn other way around.)

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<div class="post-metadata">

**Author:** ![SCALEMODEL](https://avatars.discourse-cdn.com/v4/letter/s/77aa72/32.png) [@SCALEMODEL](https://discourse.shapr3d.com/u/SCALEMODEL)\
**Post date:** [June 20, 2025, 11:44pm UTC](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453/20 "2025-06-20T23:44:18Z")

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It’s only harder in Shapr3d, because the way FIT curve works in CAD tool vs Graphic Design tool, but still it is more related to Bezier Curve.

What I’m curious is, take your C you created with Control Spline export it and open it in Illustrator or any graphical vector program, it converts into segmented lines, Fit Spline does not.

[Next page](https://discourse.shapr3d.com/t/chamfer-and-no-blend-error/38453.md?page=2)