This parametric model generator is created via MakerWorld's implementation of OpenSCAD and allows you to customize a cap for many things.  The intended purpose of this generator is to make TPU (or other flexible material) caps that can be used for things such as the following:

• Chair/Table feet - Can be placed over chair legs to act as a protective layer between chairs and hard floors which prevents scraping and loud annoying noises when moving chairs
• End stops for pipes or tubes - Some piping may have sharp or un-appealing edges that can be covered or plugged up with this model
• Caps for dowels or metal extrusions - Similar to pipes, they can have rough ends that can be easily covered using this cap generator
• Caps for holes - Can be used to make caps for things like the P series top frame hole or various screw holes

Features of this generator:
Shape: To adapt to the profile of the capped object

Type: Outer caps to fit the outside of an object, or Inner caps to plug objects such as pipes

Size: To match (x, y)/d and z dimensions of the capped object

Base: Determines the size of the cap end

Tolerance based options: 

• Fillets and chamfers for the base of the caps, along with fillets and chamfers for the walls of square caps
• Wall thickness for adjusting sturdiness of the cap walls (thickness var)
• Tapered amount for more tightness or tapered objects (taper var)
• Slots more tolerance control and ease of adding/removing caps (slots vars)

Tips for choosing the right settings:

• The rougher the object you want the put the cap on/in, the more extra tolerance you want to include in the length/width/diameter dimensions and the less tightness you want to have (if its very rough, set tightness to zero). Vice-versa for smoother objects
• For printing, I use the gyroid type infill for more squishiness in the cap base. Change to a non-3d symmetrical type infill for more rigidity (Ex grid infill)
• For printing, changing the the amount of bottom layers can effect the stiffness of the cap. Less = greater squishiness, More = stiffer
• For printing, I used Bambu Lab's TPU 95A HF, which should work for most applications of the caps

Notes:

Comment any features you may like to see.

If you find a problem with the parametric model designer, let me know (either through comments or dm) and I will try to fix it

I am new to OpenSCAD, so please know that some features/fixes I may not be able to do because of my lack of experience using the software

Some combinations of setting may lead to small parts that could be a potential choking hazard, especially if made from TPU.

Version History:

V2.0 - Current version - Complete code re-write for efficiency and several bug fixes. Square caps are now named rectangle caps and "height" now refers to the cap wall height

V1.1 - Added fillets and chamfers to the caps along with many changes to the code

V1.0 - Initial release