Knot Anymore! Jugglebot's (Practically) Knot-Free Design! - PDJ #16

Discover the latest innovation in Jugglebot's design - a knot-free string system that makes adjustments a breeze! In this video, we'll explore the challenges of using knots in the string design and introduce a simple yet effective solution: the bolt-based string attachment.
🔧 Say goodbye to the hassle of tying precise knots in Jugglebot's strings and struggling with adjustments.
🛠️ Dive into the new design that utilizes a single bolt to secure the string ends, making adjustments quick and painless.
🤖 Learn about the benefits of this knot-free approach, including improved accuracy, ease of assembly, and time savings.
*** Link to Cord Lock Mechanism ***
www.printables.com/model/2998...
00:00 - Intro
00:41 - Component Design Requirements
01:34 - Existing Designs
02:55 - New Design!
04:54 - Some Knots Remain...
06:37 - Concerns with the Design
07:51 - Closing Remarks

[@harrisonlow]

Hey everyone! I'm excited about Jugglebot's new (mostly) knot-free design, and I'd love to hear your thoughts. Have you ever had to deal with tricky knots in your projects? Share your experiences and any creative solutions you've come up with in the comments below! Let's start a conversation and learn from each other. 👇😊

[@23lkjdfjsdlfj]

Maybe something like a clip bolt lever could clamp down on the string, instead of having the string kink up and shear off due to the screw thread. F.e. some pedal bike's have the front tire bolted on loosely and then tightened with a lever. You wouldn't need the bolt because your 3D model could include the clamp mechanism. The only part you'd need would be the special lever.
Clamp mechanism: string goes through a hole that has a very thin side. The lever simply pushes down on the thin side - which crushes and tensions the string. Google shows they sell just the aluminum clamp part without the bolt - which seems perfect.
It's more weight, but maybe a tiny clamp could be found. A tiny 3D printed one might just work for you too?

[@RandomAmbles]

This would be ideal for tensegrity structures, I think.

[@wolpumba4099]

Amazing. I love the clear presentation.

[@whall22]

Very cool! Jugglebots really coming along. Did you have any references to the sharp corners decreasing the strength of the cable comment? I work a lot with cable robotics as well and feel like thats something I should know about! Cheers.

[@harrisonlow]

Thanks!
I didn't have any specific references for that comment in mind, as I've just come to learn it from years of climbing / rope "adventurous activities" experience. Googling "rope strength over edge" seems to get pretty solid results if you haven't already tried that.
Tbh I don't think it'd be *that* big of a concern for this project since the strings are already so strong, and I'd guess you'd be in a similar position with your robots. Have you ever had cables break?

[@BenL42]

The tensionless hitch has near zero impact on line strength. Most people would describe a tensionless hitch as simply wrapping the line around the spar (or screw) multiple times ;-) So your screw wrap design is near certainly stronger than any knot. Now, so long as it doesn't slip... ;-)

[@harrisonlow]

Good to know! Re. line strength, I'm more worried about the pinching/kinking that will undoubtedly occur when the bolt is tightened. I'm not terribly worried about this though, as the strings are super strong