OLS Keycaps
Description
PDFThe Open Low-Profile Spherical keycap profile.
CadQuery sources and more variations at https://github.com/DeltaWhy/ols
Update 2024-09-01: Added correct files for choc-lg and mx versions. Added a remix with additional MX keycaps.
Variations
Each folder contains STL and STEP files of each key. The ones with -cut are intended and pre-oriented for FDM printing, and the ones without are suitable for resin.
MX
Keycaps with MX-compatible stems. Designed for low-profile switches (e.g. Gateron KS-27, Gateron KS-33, NuPhy, Kailh Choc v2) but should work with full-sized switches as well.
Choc Large
Keycaps with Choc stems but MX spacing.
Choc Small
Keycaps with Choc stems for Choc spacing. You'll have gaps if you use them on an MX-spaced board.
Printing
For FDM printing, these caps work best oriented at 90 degrees to the build plate. This gives them a strong stem (particularly for Choc stems, any other orientation is very fragile) and a good finger surface even without sanding. You should probably use the -cut versions of the files which are pre-oriented. These cut off a bit of the rear edge to give a small flat surface for build plate adhesion.
My settings:
| Setting | Value | Note |
|---|---|---|
| Layer height | 0.12mm | Smaller layer heights don't improve the quality very much. |
| First layer height | 0.2mm | |
| Perimeters/Shells | 3 or more | |
| Infill | 20% | Doesn't matter, since they are so thin almost the whole print will be perimeters. |
| Supports | On build plate only | |
| Support Z gap | 0.12mm | |
| Support interface | 100% | |
| Seams | Aligned | |
| Raft | Depends | I had good results with R3 and R4 keycaps using a raft, but the R2 caps kept failing. Printing the -cut version directly on the build plate worked better for those. Glue stick helps. |
| Avoid crossing perimeters | On | |
| Z-hop | 0.24mm | Only when printing a batch - for a single keycap you don't need it. |
| Z-hop starting at | 1mm |
For resin, you'll most likely want to use an "ABS-like" resin to ensure the stems are strong.
License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Acknowledgements
This work was inspired by LDSA and OPK but is not directly based on either. Special thanks to the folks from fingerpunch Discord, who got me into the low-profile rabbit hole in the first place, and have given lots of helpful feedback along the way.
Tags
Model origin
The author marked this model as their own original creation.
