# Trouble with connecting curved and straight surfaces **URL:** \ **Category:** SketchUp\ **Tags:** 3dprinting, surface, chamfer, block, surfaces\ **Created:** [October 9, 2017, 9:59pm UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968 "2017-10-09T21:59:19Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![vulturenest](https://avatars.discourse-cdn.com/v4/letter/v/73ab20/32.png) [@vulturenest](https://forums.sketchup.com/u/vulturenest)\ **Post date:** [October 9, 2017, 9:59pm UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968/1 "2017-10-09T21:59:19Z")
I am having a problem with making a large chamfer on a simple block piece. Not sure i can upload the pics I made for this, so have to describe it. It is a rectangular 2x2x6 block, top surface divided into 3 equal 2x2 surfaces. I then raised the two outside squares an extra inch, making the top look notched. I need to add a chamfer on the inside corners with the same radius as the height of the block. So I add a circle on the front of the block, 1 unit in from the inside corner, then used Push/Pull tool to push out the chamfer. All looked good, so I deleted the construction lines and remaining pieces of the circle. But when I deleted the line between the top surface and chamfer, the top surface goes away. So how to I join this curved surface with the top flat surface? Visually it doesn’t bother me since I’ll be printing this via Shapeways, but I’ concerned that the extraneous line/surface break would give an error in the STL file and/or 3D print. Mike Conder ---
**Author:** ![DaveR](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/daver/32/7601_2.png) [@DaveR](https://forums.sketchup.com/u/DaveR)\ **Post date:** [October 9, 2017, 10:02pm UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968/2 "2017-10-09T22:02:25Z")
I expect the solution is simple enough if we could see your SKP file. How about uploading it with the Upload button, 7th from the left in the row of buttons above the message window. ---
**Author:** ![spawn](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/spawn/32/37792_2.png) [@spawn](https://forums.sketchup.com/u/spawn)\ **Post date:** [October 9, 2017, 10:23pm UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968/3 "2017-10-09T22:23:27Z")
As Dave said, the .skp file would be helpful to try to help you. After uploading the .skp file you can use that button again to attach a picture to show us what you need. ---
**Author:** ![vulturenest](https://avatars.discourse-cdn.com/v4/letter/v/73ab20/32.png) [@vulturenest](https://forums.sketchup.com/u/vulturenest)\ **Post date:** [October 9, 2017, 11:04pm UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968/4 "2017-10-09T23:04:04Z")
![Test 2](https://global.discourse-cdn.com/sketchup/original/3X/3/3/33576ad6f5a6339bec13fc358e524d9aeed9bf63.jpg) ![Test 3](https://global.discourse-cdn.com/sketchup/original/3X/f/2/f28185d6ad6083528f134d84b3d2b8b431961baf.jpg) ![Test 4](https://global.discourse-cdn.com/sketchup/original/3X/8/8/88976471c56840198a38f5fa7428e52dc6e61927.jpg) ![Test 1](https://global.discourse-cdn.com/sketchup/original/3X/f/2/f20545cf8bdd099ff39b4436ea811efe1ecf5c0e.jpg)[Steam chest test.skp](https://forums.sketchup.com/uploads/short-url/b8DMOAtXM9G1eBlLeYIgpNT1tvi.skp) (1.2 MB) Ah, those buttons are gray’ed out so I thought they weren’t functional. Hopefully all will be attached … Mike Conder ---
**Author:** ![spawn](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/spawn/32/37792_2.png) [@spawn](https://forums.sketchup.com/u/spawn)\ **Post date:** [October 9, 2017, 11:08pm UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968/5 "2017-10-09T23:08:21Z")
Is this what you want? ![image](https://global.discourse-cdn.com/sketchup/original/3X/a/d/ad19d3b737cc1c90fe4de851649e3969365c66df.png) ---
**Author:** ![vulturenest](https://avatars.discourse-cdn.com/v4/letter/v/73ab20/32.png) [@vulturenest](https://forums.sketchup.com/u/vulturenest)\ **Post date:** [October 9, 2017, 11:17pm UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968/6 "2017-10-09T23:17:50Z")
Exactly! I figure I’m missing something pretty basic … Mike Conder ---
**Author:** ![DaveR](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/daver/32/7601_2.png) [@DaveR](https://forums.sketchup.com/u/DaveR)\ **Post date:** [October 9, 2017, 11:18pm UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968/7 "2017-10-09T23:18:07Z")
Hold CTRL while you click on the edges with the Eraser tool. ---
**Author:** ![spawn](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/spawn/32/37792_2.png) [@spawn](https://forums.sketchup.com/u/spawn)\ **Post date:** [October 9, 2017, 11:19pm UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968/8 "2017-10-09T23:19:29Z")
Through the menu **view \> hidden geometry** and using the option show **endpoints** temporaly you will be able to understand better what’s happening. ![image](https://global.discourse-cdn.com/sketchup/original/3X/f/0/f0ee09bc3921b52a121fff6d42a8e3ea5e30f89e.png) You will see several lines with dots, they’re are edges that are soften and smooth. You could make all of them visible with the eraser tool + control + shift You can soft and smooth them with eraser tool + control ![image](https://global.discourse-cdn.com/sketchup/original/3X/3/3/33e9b01a50bbf1e6f9f21939a4313d699211e38b.png) The lines you see are connecting the edges and with the arcs ![example](https://global.discourse-cdn.com/sketchup/original/3X/6/e/6e44367983a76b785e59c5e290bb0c71117ab70e.gif) What I did to fix it was using the eraser tool holding the control key that works as modifier and lets you soft and smooth those edges. ---
**Author:** ![vulturenest](https://avatars.discourse-cdn.com/v4/letter/v/73ab20/32.png) [@vulturenest](https://forums.sketchup.com/u/vulturenest)\ **Post date:** [October 10, 2017, 6:32am UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968/9 "2017-10-10T06:32:57Z")
Thanks, that worked like a charm! Mike Conder ---
**Author:** ![jonathonlt](https://avatars.discourse-cdn.com/v4/letter/j/3bc359/32.png) [@jonathonlt](https://forums.sketchup.com/u/jonathonlt)\ **Post date:** [October 10, 2017, 2:06pm UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968/10 "2017-10-10T14:06:56Z")
I to ,Ithink you have to sort out the segments of the corner radius ,in entity,edit is possible ,so that you have a symmetry line junction to the straight line ZOOM IN ,Jon, ---
**Author:** ![system](https://global.discourse-cdn.com/sketchup/original/3X/f/2/f2a121500b085ed60806607a82720b092d800bb3.png) [@system](https://forums.sketchup.com/u/system)\ **Post date:** [January 10, 2018, 6:06am UTC](https://forums.sketchup.com/t/trouble-with-connecting-curved-and-straight-surfaces/52968/11 "2018-01-10T06:06:56Z")
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