Just wait until you see what I’m about to post about 30 minutes…
3 Likes
Look outstanding Glen! I bet a run of these would be a mega hit.
Does PC have higher density than wood and therefore create generally longer spin times? Is the weight similar to wood with same dimensions or did you have to make any modifications to your original dimensions to accommodate the PC material?
Seems like this highly polished PC would create a bit less friction against the string as compared to wood which I’d think would also increase spin times. Has this affected the response at all though?
5 Likes
The density is significantly higher than wood, that’s why I make these PC models undersized, otherwise they would be way too heavy, something like 100g.
This Button is 85% the size of a regular Button at 48mm diameter. Every aspect is 85% of a Button except for the response holes.
Interestingly, I polished the response area of this one, unlike the PC KNacks I made and it responds even more reliably and smoothly. I have no idea why.
The spin time is comparable to a full sized Button.
4 Likes
Thanks for the details! Makes perfect sense now!
2 Likes
It just occurred to me that maybe you could experiment with a full size PC model that has a “cup” and thin walls to get the weight down. Not sure if PC is strong enough for this though? Is this something you’ve considered?
4 Likes
I considered it, and there are a lot of problems with that.
4 Likes
The next experiment is to make a Knick-KNack that is 88% rather than 80% the size of a KNack. This will bring the diameter to about 50mm instead of 46. The original size is good, I just want to experiment with a larger one to see how it feels.
I also would love to make a yoyo out of this stuff, which is basically the most advanced, semi-crystalline thermoplastic available. Its very tough and very resilient under all kinds of tests. Just look at that price!
It probably won’t happen. BUT, if I can find it in a rod diameter, of 1/4", I may use it for the axles in a new UHMWPE Survivalist model. It has a melting point of over 250 degrees Celsius, so no fear of the axle melting.
11 Likes
Do you flame polish those?
2 Likes
No. I don’t think you can flame polish polycarbonate.
1 Like
Ah okay, does Vapor Polishing work?
1 Like
Yes, if I can get my hands on whatever super nasty chemical works on polycarbonate.
2 Likes
Seems they use Methylene Chloride/Dichlormethane to do this. Don’t know if that stuff is readily available somewhere. And you are right it’s pretty nasty stuff. The good thing is it does not seem flammable in normal Air.
1 Like
It’s pretty rare for me to make unresponsives these days because is rather difficult to do using only a wood lathe. But I have rethought my methods and tooling and now making them is easier as well as more efficient and reliable. This one plays like a dream and is virtually vibe free (for those who care about that kinda thing).
I was looking for a new slightly undersized yoyo that is on the heftier side (67-68g). I ended up trying to make what I was after, and it turned out really nice. The only complaint is that it feels a lot floater than I was going for, but oh well, its a bit of a side effect of making yoyos from POM.
24 Likes
That looks fantastic. I have to say, in my opinion you overestimate the vibe in your POM yoyos. I completely understand why, as you don’t want to have a buyer crying that their handmade yoyo isn’t 100% vibe free. However, at least the cherry red Spinworthy I have is a fantastic player, and has become my go to plastic.
4 Likes
Thanks, mate! I’m glad you like it!
I hope to make a few more POM yoyos, maybe even experiment with putting steel rings in them. Any idea where I can get myself some of those @yyfben2.deactivated?
5 Likes
Hey @Glenacius_K,
I bought some for my 3D printed Yoyos. They are “Dream catcher” rings to weave a pattern into. They work very well u get different material and sizes. I am located in Europe FYI.
4 Likes
Thanks mate. I’ll check it out!
4 Likes
Currently I’m negotiating with a representative of FPM who contacted me about producing my yoyos.
I told them that I make mine by hand but that I’d love to try out the guts hardware they use in the Dove.
There going to send me some samples to test out! I’m really looking forward to seeing what I can make with them.
I also asked for some steel rings from the Raytracer, that I hope to experiment with. Hopefully they will give me a sample of those too!
17 Likes
So excited to see what you can do! Oldest brother glued my Harbinger for me so I been rocking that today.
Edit: Thought this was the “Show some wooden yoyo” Not plastic. 
6 Likes