Clear knobs with LED back lights for the flake body?
Could you pour a block of epoxy, then cut it like you do for the other knobs?
With the right tools it's easy to mix tiny batches. I didn't even buy pumps.If I could figure out the LED’s I might do that.
I have been pondering just pouring some epoxy. I have some either 1/2” or 3/4” copper pipe caps that are the right size and shape. I was originally thinking the same type of recess in the top of the knob with either metal flake or the color change pearl, I also have some gold pearl. The thing is I’m pretty sure the flake or pearl is going to float in the epoxy so I’d have to do it in 2 parts and it’s hard to mix West Systems in small amounts like that. I may mix up more and try several things at once. I’ve also been meaning to stop by Woodcraft and / or Rockler and see if they have any pen blanks that seem interesting. I just haven’t been that direction with any time for a few days.
What are you using for the inserts? Aluminum tubing?I’ve been quiet but working in some shop time. I was working on knobs for the two basses. In the pictures the top set is turned from body off cuts, so cherry and myrtle. I did those first partially to get back into the turning swing but also in case the others didn’t work out. They’re currently unfinished. There’s one accident represented there. Must have been a flaw in the wood. Fortunately the pieces flew down so the face shield didn’t even get bumped. Still, “exciting.”
The other darker knobs are what was sold as an imitation horn pen blank at Rockler. They’re inlaid with a piece of myrtle on the top. That material is pretty brittle and chippy. I’ve made knobs out of a few acrylic pen blanks and this stuff is a lot worse. I had a few issues threading them on the mandrel, then one got a huge chunk out of it while turning. Another split while threading it on the mandrel. I was able to glue that one back together. It survived turning and sanding then split again when I tried to press in the potentiometer shaft insert so I just split it open the rest of the way and saved the insert. Out of 6 blanks of imitation horn I got three good knobs and one of those is smaller than the others so I guess it’s going to be Jazz Bass style VVT. They do look really nice in person though.
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I’m still thinking about knobs for the metal flake body. I had one idea but it didn’t work out. I also just made some blanks for something more like novelty knobs. We’ll see how it all turns out. I have another idea but it would require pouring some resin and I’m not set up for that.
I started on Grandpa's old Sears dual tube lathe. Only slightly better.There's what looks to be an old (or wait, do I mean "classic?") Sears monotube lathe lurking in the paint pictures on the 42nd page of the thread. Which might or might not be the lathe in question here, @TerribleTim68
Not one of my favorite lathes, they like to go out of whack with the degrees of freedom the single tube base offers the parts. But better 'n no lathe.
I started on Grandpa's old Sears dual tube lathe. Only slightly better.
I'm hoping for more info specifically on how he is holding the knobs, I'd love to see the mandrel he is chucking them in. I have several pen turning mandrels, but they are way too small. I think I also have a bottle stopper mandrel somewhere, which could be too big.
But I've got this Tele build that may require some custom knobs and I'm always looking for a better way to hold those tiny parts on the lathe.
Even with official mold release I'd be concerned that there's not enough draft and they might be hard to release. They are pretty inflexible and the suction is significant.
Paste wax is one possible approach to a mold release that's often in-stock in a shop.
Got anything like a plastic pill bottle on the way to recycling you could just turn off if it sticks?