I got notification about question on how to make knurling on curved surface, but couldn't find the comment anymore. In this video we will make knurling on curved surface in Designspark Mechanical, as part of basic tutorial of 3D Modeling for 3d printing. Anyway, there's some limitation with how the cutting shape orientation through the sweep path, if you have any suggestion please don't hesitate to put in comment.

0:00 Opening
Part I. Make Diagonal Knurling
00:19 Make solid object with curved surface / vase
01:30 Define the path : knurling start point - end point
02:25 Define the path : make the sweeping path / line
03:03 Make the cutting shape
03:57 Cutting the first knurling
04:40 Copy the knurling to radial pattern

Part II. Make Diamond Shaped Knurling
06:44 Make solid object with curved surface / vase
07:03 Define the paths : knurling start point - end points
08:00 Make the cutting shape
08:35 Define the paths : make the sweeping paths / lines
09:30 Make cutting solid : Right side knurling
10:22 Make cutting solid : Left side knurling
11:20 Combining the cutting solids
11:55 Copy the cutting solid to radial pattern
13:25 Cut main solid object with the cutting solid pattern
14:11 Cleaning unused solids

14:44 Closing

Link to download DSM : https://www.rs-online.com/designspark...

Link to download FreeCAD : https://www.freecadweb.org/downloads.php

To export the design to STL or OBJ file, you can use the "Export Options" menu on the top right (in Design menu tab), and select STL as the format.

Yes, there are many mistakes in my grammar and limited (technical and non technical) vocabularies, please don't hesitate to correct me. And anyway, if you have any suggestion about what to design, please let me know in the comment. Thank you for watching, and have a great day :)