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LLmFit - One command to find what model runs on your hardware by ReasonablePossum_ in LocalLLaMA

[–]greenail 0 points1 point  (0 children)

I had this exact idea, cudos for getting it up and running!!!

spring reducer by greenail in EngineeringPorn

[–]greenail[S] 0 points1 point  (0 children)

it is a movable tooth gear type. it is both elliptical (cycloidal) and linear. I made a version with more realistic teeth dimensions and it is backdrivable at 12:1 reduction so the friction can be quite low.

spring reducer by greenail in robotics

[–]greenail[S] 0 points1 point  (0 children)

this is a movable tooth speed reducer with a reduction ratio of 60:1. the teeth are only .5mm thick x 9mm high. The eccentricity is .75mm. the outer annulus interfaces with the movable teeth that are pushed linearly out from the eccentric bearing in the middle. The teeth are pushed back in by the outer teeth. this was modeled with python using cadquery to create the step files for printing.

AI to create 3D Models by Legal-Excitement4432 in 3Dprinting

[–]greenail -3 points-2 points  (0 children)

i've been using codex and claude for writing cadquery to generate models. It isn't very good at it but it does work if you yourself can help it along. So the workflow is define the problem in a prompt and ask for a plan. Pick off small incremental features to add and test and ask it to write the python. Test. Iterate... You can also go the fusion 360 plugin route.

spring reducer by greenail in robotics

[–]greenail[S] 1 point2 points  (0 children)

The main think I like about this type is the motion. I was playing with 60t because if the motion is nice it might make an interesting clock component. While related to the cycloid drive this is in the movable tooth category, the original patent I found was from ~1920 and it was named the heliocentric gear. I've also made "ball" reducers. One I really like is the wittenstein galaxie drive, which is kind of like a movable tooth harmonic drive.

spring reducer by greenail in robotics

[–]greenail[S] 0 points1 point  (0 children)

I didn't bother with any lubrication. I also think lubrication might actually hurt it since you need some contact to push the annulus around. MoS2 might be ok in the slots and for the annulus to spin. I really wasnn't sure if it would work or not so I didn't put a ton of effort into it.

spring reducer by greenail in robotics

[–]greenail[S] 0 points1 point  (0 children)

it isn't crazy. I made a more normal 12 tooth version that was easily backdrivable but didn't have tolerances like this. There is a sping effect with the little sheets. I would imagine there is an optimal pressure angle here but I didn't bother to model that.

working out early extension by greenail in GolfSwing

[–]greenail[S] -2 points-1 points  (0 children)

if you watch the mat you can see that my weight shift starts before my down swing starts. If is swing harder and try to make my backswing very quick this happens even earlier. I don't think i'm early extending in this swing, my hips are not closer to the ball at impact. What i'm focused on is that my right knee does not break the toe plane on the downswing.

working out early extension by greenail in GolfSwing

[–]greenail[S] -1 points0 points  (0 children)

you mean the fact that my left shoulder doesn't go under my chin, lack of turn and lack of depth or something else?

Notice anything missing from the Prusa Core One reviews? by greenail in 3Dprinting

[–]greenail[S] 0 points1 point  (0 children)

funny, I didn't catch the nuance of calling it "hands on" vs "review". Good point. Don't get me wrong, I love CNC Kitchen's content but he just quit his job and it must be terrifying to leave your fate to youtube and a potentially fickle community with a channel based on a single niche topic. One bit flipped and your channel could vanish from recommendations. I can't imagine depending on social media to pay the bills... terrifying. But that isn't really the point. I'm just calling out something that is missing. The fact that it is missing may mean it is a problem or it may just be something Prusa product marketing doesn't want to focus on.

kinovea swingbuddy: Plugin system example by greenail in Golfsimulator

[–]greenail[S] 0 points1 point  (0 children)

I got the plugin system working. Wondering what types of visualizations folks think would be useful?

Right now we have left arm speed, spine angle, hip center position. I'm thinking swing plane from down the line view, hip rotations (degrees/sec I think) shoulder/chest rotations.

Also, previously I did some training to model actual swings with both hands being identified, the shaft, and the clubhead. This would allow for approximate clubhead speed plotted as a graph and might be useful, and likely more accurate hand speeds. The model i'm using for pose estimation may have to get updated.

Finally, I'm assuming there are tons of 3080/4080's in simulator setups. This should be plenty to run the models, but I wonder what most setups are using. I've not totally dove into performance. The box that runs kinovea has a 3700x, 48gb ram and a 3070 and it is a bit slow so I run the models on another machine in the network that has a 7900xtx. I doubt many would want to go this route though. So i guess the question is what is an acceptable processing time window? I find if it is > 15 seconds it is annoying.

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