The file 'Spring-loaded NEMA 17 Steppers / Belt Tensioner 3D Printer Model' is (scad,stl) file type, size is 55.0KB.
This is an improvement to precisely set and keep a given belt tension by pulling the stepper motor downwards with a spring.
Some people were asking for it in the original design, mainly to reduce the risk of over-tightening the belt.
So here it is: obviously you'll need an appropriate spring and a fews more nuts & washers.
Additionally, it might even compensate belt length variations during print if the stepper is kept slightly loose
Update: I've added a 4-screw version, probably required if you do not have the wooden plates but 4 cylindrical independent spacers.
stepper_tensioner_spring.scad | 5.3KB | |
stepper_tensioner_spring.stl | 308.6KB | |
stepper_tensioner_spring_4screws.stl | 378.8KB |