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Could someone point me in the right direction to get started on projects like this? Specifically I have an old Emerson CRT that the volume/power knob is missing on and it's impossible to find an OEM replacement. I've been dreaming about getting into 3D printing to print my own, but I don't know where to even begin considering I would need the exact dimensions of the D shaft and then to model something. Appreciate any help, thank you in advance <3
The first time I took on modelling a replacement part, I took as many measurements with a caliper as I could, fired up Fusion 360 and just went for it with no prior experience. It is actually really intuitive and all you need to do is visualize how simple shapes like circles and squares can be used to construct the object. Basically, don't be scared of starting out and try to break down the object into simple and approachable parts.
My first object was a kind of transmission cog, so a very cylindrical object, much like yours. All you really should need is the diameters of different "circles" comprising the model and the cylinder heights.
Or do the lazy thing, and just keep borrowing other knobs.
if everyone is confessing: Back in my first year in Uni, I and buddy stole a cpu and monitor from storage, not from computer lab, just from storage which was scheduled to get replaced. It was a HP business desktop set from 2009. Fairly spec'd
Buddy wanted a second monitor and I wanted to host some fun sfw websites on lan. Some years later, it now works as my home server with some cheap upgrades.
Oh I also nicked stuff from e-waste dumps: psu's, routers, switchs, electronic trinkets from the labs(I asked lab attendants and they said they don't care)
My uni didn't allow us to use the labs in our free time, and I learned a lot!
I though you needed consent to put sometimes knob in you pocket ...
There was this one time when I needed to replace a specific part of a dog bike trailer. I contacted the company: the creator of the trailer, who happened to live in my neighbourhood came to my place to give me a piece from the prototype he still had in his workshop. Shop local!
Or you just do the most practical thing and order a $2 replacement from Amazon/Aliexpress
How much time it takes for a regular cad user to draw such a knob?
Like 5 minutes.
It is basically 2 rings and a plate with some text on.