Why not use unistrut. Gives u many options for supports and attachments and with 2 people u should be able to lift and move it around

old rope looked like an old blue water incarnation.

Just so you are aware, the position you are hiring for is probably better described as a Controls Engineer, not software. (You can't engineer software anyway, but I digress).

just an algorithm comment. this iterative process is awesome to see.

As a former mechanical engineer, this was pretty funny to watch. The mistakes were great, but I'm glad you show the struggle and testing efforts required to make a rigid, useful machine like this.

lol called it, granted a little late ;) But was surprised it lasted as well as it did.

That diameter screw is probably only rated for ~10kN or so. I would expect a system capable of repeatedly break climbing gear would need 25mm diameter ballscrew, minimum. My thought is, 35mm+ would be even better. With the addition, as others have noted, of proper thrust bearings for tension forces in the screw.

Dude!!!!! So proud of you! Talking to you a few years back about all your plans and what you were going to turn HowNot2Highline into something big! Now this!!!! 🎉🎉

I feel like that would’ve been stronger and more disassembles if you had made it out of unistrut

1:41 I think that's actually a Wooden Testing Facility, simply because the abbreviation is more appropriate.

I was just wondering what load cell you were using for this project?

Wooden Testing Machine? Nah. Wooden Testing Facility? WTF? Yeah!

Hey Ryan, that's a neat idea to build it in "CAD" as it were. One thing you may consider as a platform for future tests and as a strong yet inexpensive frame would be a "shop press" Which has a steel welded or bolted frame with a range of mounting options. I think a cheap 12 ton is about $150. This way you aren't dealing with wood screws in shear. For future "wood and screw" construction definitely consider using engineered lumber (from a re-store or similar salvage lot for cheap) in conjunction with SDS screws which are rated for loads in shear. Exciting to see how you are iterating to get to what might end up being a modular and portable design.

can't wait to see more about this! it's super interesting

I love the community approach you are taking here. Maybe this will never be profitable but a wonderful gift for manufactures.

Is that a sheet bend with an overhand finish?

WHAT on Earth is a "metric foot" ?

WTF is a metric foot. That would be a nice world if there were 10 feet in a decafoot.

5:20 what's this angle along with the serious expressions... I feel like I'm tied up and owe you guys money or something and you're getting ready to throw me off a pier. Lol

I am a commercial fisherman and I do a lot of splicing with poly and nylon 3 strand alway curious about the strength of the species and just the rope in general can I send you some stuff to break ? How long should a 3 strand splice be does it have to be ratio to diameter specific or can I save time and make it shorter?!?! So many questions about gear failure!!!!!

8:03 a bolt, or the steel bar at the other side of the wood frame (btw, the bolt needs a hole in the wood, so less wood = less strength) The fixed parts that are subject to pulling tension (upper base and lower support) should be "outside" the main columns (as if they were to compress them). If it were strictly necessary to fix that wooden frame laterally to the bars, making a small recess in the main vertical bars (look at "lap joint" or " T halving/cross halving" in woodwork) where the horizontal wood fits, would withstand greater tension . It isn't necessary to half recess the horizontal bar, just a few mm (without that joint work, all the force falls on the screws, and it is easy to break them with lateral force (shear))

Ryan I can see a lot of potential here for a colab with machinist youtube! Not An Engineer (@NoEngineerHere) might be an interesting person to reach out to

That sounds like a RAD idea! A traveling box of destruction! Doing a series of live shows would be fun, and interesting! I wish we could get an .ma file or similar. I like to model and test lots of assets, but haven't really done much modeling of "rigid body dynamics" so to speak. Mostly particle and light stuff... But I can probably work around the weird incongruity of the behavior of rigid body objects and it's dynamics with friction. Coulomb's friction law more specifically. But overbuilding to a medium degree would probably negate needing to use such proprietary software. I'm just a snob for mechanical efficiency! Lol! And I think being diligent with alignment and "plumb-ness" will be CLUTCH in making this not only efficient, but also long-lasting, accurate, and repeatable! And for folks wondering how much something like this would cost to personally build........ I'm guessing a shitload! The structure to hold all of this shit will be cheap, comparatively! Lol! I worked for a small manufacturer that built a mechanically identical machine dealing with slightly higher forces, and each of the 4 ball screw rods they used were 10 feet long, about 1 inch in diameter.... And had a $15,000 price tag..... EACH! We also had issue with using dual motors.(In your case a single.) But individual motors driving each rod was a game changer, and was actually cheaper than 2 of the larger motors and the pulley linkage system to bring it all together. Our logistics manager guy shit his britches when the job's current tci went from like 5 grand to over $50,000 with a single order! I got re-invigorated to start clawing at rocks again by this channel, and a run-in with Bobby a while back. And now I am buying gear as I can afford it because I truly love the direction HN2 is going! I used my top rope solo set-up... Exactly 3 times in 2024! I went climbing 5 times! I care much more about the channel being sweet ass action, than the number of times I can go flail around on a ledge. Thanks for doing the damn thang homies!

Try do design in a way that all pieces are being pulled towards one another instead of away. This way, you won't have to struggle with screws pulling out or through the wood and will be able to use the wood to is maximal strength

You need some thrust bearings at the top of your ball screws to take the load. Currently the bottom bearing blocks take the load which is not what they are designed for.

Statement: You should have used chain instead of a belt, no slip and you can have pretty terrible tolerances and get good strength out of your system.

Oddly enough I just finished a brake test machine out of wood. It’s not for climbing grade forces… it only goes up to 4Kn or so. But it’s just 2 2x4s with 4x4 end caps, a scale on one end, and a pair of 3 ring pulleys on the other end. Stand on the rope to use your weight to pull down, and hope the paracord holding the pulleys in place keeps them from flying out at your leg.

I guess the ball screws have hardened shafts, those couplings are probs struggling to get a grip against such a smooth surface.

I'm wondering if at a certain kn the ball screws will just ride in place due to the pulling force of the test compared to the friction the screws need to move the load.

Could you test a fisherman's knot as a climbing knot? I've noticed some Arborists and Tree Saddle hunters using it instead of a figure 8 on a bite. I'm very curious.

The safety has yet to evolve from procedure to protective guards, and that’s okay for now. Just don’t let anyone else near it and you’ll be fine

“Safety is on the list, it’s just not first on the list.” A quote for the ages 👍

I’m waiting for all the useful improvement comments from smart engineer type folks. Let the crowd sourcing begin!

Kill Tony rock climber model unit

Drill:Screw mechanical advantage.

wood

That slipping pulley needs either: - A flat on the shaft and a grub screw - A Woodruff key - and a chain drive when the belt strips its teeth. Looks like fun!

"some settling may occur" I love it

can you use a chain instead of belt?

Want a machine? slacksnap.com/ Software engineer? Please apply at forms.gle/iKX4uZBUYwo2F9YV7

No data, just breaking things 💪🏼

Well the reason is when its not under load it can Shake out......can .....unlikely.....but still can

Would this not be 2 sample sizes of 1? A sample size of 2 would be the same test twice, no?

Dynabrake

Holy stink, Ryan's out here with the whole store dangling from his person. Lol

Girth Hitch Master Point sounds like the latest Bad Dragon release

Is there a video comparing the strength if its installed in a dusty / improperly cleaned out hole??

Ok I've used figure 8's on rescue and was taught to always put a safety knot on the tail.so try that on your videos

Here's a crazy idea, maybe put the amount of pressure in pounds? For all of us who live in the greatest country on earth?

I thought it would be longer. This makes a lot of my concerns about using one go away.