How to make a screw knob for M6 or larger

[Lenbok]

I need a screw knob for a M6 screw, and thought there may be a suitable component in here (I've never used NopSCADlib before). My attempt to just modify the tests/screw_knob.scad demo to take M6 weren't really adequate, as the finger knob radius did not increase. Is there a recommended way to adjust additional parameters such as the knob radius and depth?

[nophead]

Simply making knob_r = knob_stem_r + knob_wall produces this:

Is that what you need or do you want extra parameters?

[Lenbok]

That's not too bad, I ended up increasing knob_waves (the ideal size of a knob wave is essentially determined by human finger size), and I also increased the thickness and decreased the stem height for my purpose (since I was essentially replicating an existing knob and I wanted to match those dimensions). I think the last two might be useful to parameterize.

[nophead]

Most objects in the library are fully parametric. This one is an old piece of code I migrated and not up to the same standard. I will rewrite it to take a parameter list, like the other objects with a function construct the list with sensible default values that can be overridden to taste..

[Lenbok]

OK, so it was just my bad luck that the first item I try from the library happened to not be parameterized! FYI, here's what I ended up printing (along with the original I'm needing to replicate), in case you wanted to adjust the look and feel at the same time :-):

[nophead]

Now fully customisable via d46913ce4f64656889fd29dccc0709d84d4d9c49.

[Lenbok]

Wow, that's great!

[nophead]

The original use was for some M3 bed levelling screws and then I re-used it for fastening a removable cover with M4 screws, I never anticipated using it to replace broken knobs.