This is a fully customizable keycap generator for mechanical keyboards with Cherry MX style switches (Cherry, Gateron, Kailh, Outemu etc.) in OEM profile, which is the most common keycap profile. To customize you will need Fusion 360 which is free software with the education or individual designer license.

There are 6 parameters representing row 0-5. Just set a value of 1 for whichever row you would like to make a keycap for, and make sure to set a value of 0 for all of the other ones. This will automatically modify the angle, concave and height of the keycap for that row. That easy!

Instructions:

1. Register, download, and install Fusion 360 (https://www.autodesk.com/products/fusion-360/students-teachers-educators)
2. Open the .f3d file in Fusion 360
3. In the Design environment click MODIFY -> Change Parameters
4. Adjust the U_Width (1 for normal keys, for a standard shift key etc.)
5. Edit the Sketch Text sketch - Right click on the example text and click Edit Text and change to your liking. Adjust the box around the text if needed so it is centered
6. Set a value of 1 to the Row parameter you would like to make the keycap for and set 0 for all of the other rows
7. Change any other parameters you want including, Concave, MXHoleTolerance (increase for FDM printers) etc. If you don't want the stem split or ribs, right click on Split Group or Rib Web and select Suppress features
8. Right click on the main component (Key Generator Super SA) and click Save As STL, and export to your desired location
9. Slice in your desired slicer, send to 3D printer and enjoy your new key! If it doesn't fit, try increasing or decreasing the MXHoleTolerance parameter slightly.

Play around with the parameters for different shapes! If you break the model, just hit undo until its back to normal.

Update 8/6/2020 - Modified concave sketches to fix bug of model breaking when changing U width