# Inside ledge

**URL:** <https://discourse.shapr3d.com/t/inside-ledge/30645>\
**Category:** Modeling Questions\
**Created:** [March 5, 2024, 2:34pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645 "2024-03-05T14:34:54Z")\
**Posts on this page:** 16\
**Page:** 1

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**Author:** ![bbloomquest](https://avatars.discourse-cdn.com/v4/letter/b/838e76/32.png) [@bbloomquest](https://discourse.shapr3d.com/u/bbloomquest)\
**Post date:** [March 5, 2024, 2:34pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/1 "2024-03-05T14:34:55Z")

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I am working to learn Shapr now and I make LED lit channel letter signs. What I will print are actual letters that are variable in height and 3.5" thick. I use the shell tool to carve out the inside and create a letter can. In the bottom flat surface of the letter can, I place LED lights. The top open face of the letter will have colored acrylic faces.  
These faces need to sit inside the top of the letter can and not fall through to the bottom. The acrylic face is 4.83mm thick. My issue is trying to make an inside lip or ledge that is around the inside of the letter can that would be 4.83mm down from the top lip and 2mm thick.  
I think this would be done with the “Offset Edge” tool and then extruded, but I am unable to accomplish this. If anyone can either help me or direct me to someone that tutors and can help me learn this part of my design I would appreciate that greatly.  
_Here is a pic of a letter with the ledge (it is the right part of a D):_

 ![image](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/3/5/3519d9214ca72b803d0f05a340c7727413e8994e.jpeg)

_Here is a finished letter showing the red acrylic sitting on the ledge:_

 ![letter with red acrylic face](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/3/e/3edd21de850ffc176a191af7aa7db4586d223f6f.jpeg)

Thanks,  
Bruce  
Image Quest LED

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**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [March 5, 2024, 4:00pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/2 "2024-03-05T16:00:32Z")

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On the inside top edge make a construction plane perpendicular to the edge (anywhere). Draw the profile of the channel anywhere on the plane and use the sweep tool. Select all edges along the way and watch the magic.

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**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [March 5, 2024, 4:09pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/3 "2024-03-05T16:09:56Z")

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You can cut channels or add edges using that method.

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**Author:** ![bbloomquest](https://avatars.discourse-cdn.com/v4/letter/b/838e76/32.png) [@bbloomquest](https://discourse.shapr3d.com/u/bbloomquest)\
**Post date:** [March 5, 2024, 5:42pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/4 "2024-03-05T17:42:55Z")

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Thanks, I will give this a try.

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**Author:** ![bbloomquest](https://avatars.discourse-cdn.com/v4/letter/b/838e76/32.png) [@bbloomquest](https://discourse.shapr3d.com/u/bbloomquest)\
**Post date:** [March 5, 2024, 7:20pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/5 "2024-03-05T19:20:16Z")

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I am very appreciative of your response - thanks.  
I will probably need to hire someone to either show me how to do this or make a video making the ledge in a letter. I was able to make a construction plane and move it down the 4.83mm needed to be the top of the ledge.  
Then I created 2 offsets on the inside of the letter O - one on the inside letter wall and one 2mm out trying to make the thickness of the ledge. Not even sure if this is right. I can’t get past this point.  
Do you know of anyone who I could hire to tutor me on this? I have watched so many training videos, some ok and some bad and none of them gives me what I need to accomplish this ledge.

 ![image.png](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/7/a/7a3b4491d5efb5c39807ce88e93f17c55de6302d.jpeg)

thanks again

[I360 LOGO - lip const plane.shapr](https://discourse.shapr3d.com/uploads/short-url/iwcIGZNabZSj0JTaRDNww27Bx94.shapr) (266 KB)

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**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [March 5, 2024, 7:32pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/6 "2024-03-05T19:32:27Z")

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Give me a few minutes to make a vid. If someone else doesn’t beat me to it.

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**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [March 5, 2024, 7:50pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/7 "2024-03-05T19:50:13Z")

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https://www.loom.com/embed/d9b1d86ccc6c4c0ea8b7b8c22ade9d47?sid=bb5fcc27-f24f-49a6-988a-da1626574c3c

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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:** [March 5, 2024, 8:42pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/8 "2024-03-05T20:42:01Z")

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> [@bbloomquest](#):
>
> Do you know of anyone who I could hire to tutor me on this?

Is that what you trying to achieve?

[](https://www.youtube.com/watch?v=Gz2HChTmJ84)

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**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [March 6, 2024, 6:36am UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/9 "2024-03-06T06:36:14Z")

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Here’s a way to use Offset.

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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:** [March 6, 2024, 8:09am UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/10 "2024-03-06T08:09:23Z")

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Have to agree in this case your approach is better 🙂

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<div class="post-metadata">

**Author:** ![bbloomquest](https://avatars.discourse-cdn.com/v4/letter/b/838e76/32.png) [@bbloomquest](https://discourse.shapr3d.com/u/bbloomquest)\
**Post date:** [March 6, 2024, 1:01pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/11 "2024-03-06T13:01:13Z")

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Thanks more than you know. This is perfect. I just couldn’t figure it out and this worked great. Shapr3d is a great program and it’s support and connections are wonderful.  
Thanks to you and all who have helped.  
Bruce

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<div class="post-metadata">

**Author:** ![bbloomquest](https://avatars.discourse-cdn.com/v4/letter/b/838e76/32.png) [@bbloomquest](https://discourse.shapr3d.com/u/bbloomquest)\
**Post date:** [March 6, 2024, 8:37pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/12 "2024-03-06T20:37:14Z")

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Thanks Alex  
this was more helpful than you can imagine!  
Very appreciative of your help and time.

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<div class="post-metadata">

**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [March 7, 2024, 5:31am UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/13 "2024-03-07T05:31:28Z")

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A triangular profile would be preferable for 3D printing as no supports would be needed. Mike’s method would be more suitable for machining. Method of manufacture needs to be taken into account. I print, so I always try eliminate/ reduce overhangs that need support.

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<div class="post-metadata">

**Author:** ![TigerMike](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/tigermike/32/32650_2.png) [@TigerMike](https://discourse.shapr3d.com/u/TigerMike)\
**Post date:** [March 7, 2024, 5:59am UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/14 "2024-03-07T05:59:54Z")

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I add a chamfer on the underside of the ledge for 3D printing. I do this sort of thing often.

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<div class="post-metadata">

**Author:** ![bbloomquest](https://avatars.discourse-cdn.com/v4/letter/b/838e76/32.png) [@bbloomquest](https://discourse.shapr3d.com/u/bbloomquest)\
**Post date:** [March 7, 2024, 10:30am UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/15 "2024-03-07T10:30:00Z")

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I printed it last night with a triangle ledge and it’s perfect.  
Thanks

 ![PXL_20240307_003728324.jpg](https://us1.discourse-cdn.com/flex002/uploads/shapr3d/original/3X/0/b/0b973fd482377f038fd1ed85ab96571b9f2608c5.jpeg)

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<div class="post-metadata">

**Author:** ![Oregonerd](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.shapr3d.com/oregonerd/32/8012_2.png) [@Oregonerd](https://discourse.shapr3d.com/u/Oregonerd)\
**Post date:** [March 7, 2024, 2:46pm UTC](https://discourse.shapr3d.com/t/inside-ledge/30645/16 "2024-03-07T14:46:17Z")

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Great job! 👍 We’d love to see the finished product in “Share your creations”.