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Sprocket and Chain Generator

screenshot of the scene

Author: s_noonan

Group: Technical

Filesize: 73.7 kB

Date added: 2011-03-13

Rating: 7.2

Downloads: 905

Views: 1118

Comments: 11

Ratings: 7

Times favored: 0

Made with: Algodoo v2.1.0


Scene tag

Instructions are in scene. Realistic chain and sprocket. Works in Phun and Algodoo.

Rev A: Now up to 200 teeth or links, thanks to Kilinich's function.
Last edited at 2016/07/02 21:09:30 by s_noonan
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Nice! The sprocket geometry looks perfect :tup: 10/10
Thanks, I used the ANSI chain sprocket formulas. Resolution is 60 points per tooth when spawning, but Algodoo must lower it before drawing (worse resolution per tooth for larger sprockets). Sprocket Pitch is 0.5, roller diameter is 0.306 (like #41 chain if 1m = 1 inch).
Wow, somebody rated this a 1/10. Wish I new why. Maybe somebody from the ANSI roller chain committee or maybe a user whose computer caught fire trying to calculate a sprocket profile.
Last edited at 2011/03/13 23:09:07 by s_noonan
EPIC!!! +inf/10!
Awesomeness:P 10/10 for the scene and 10/10 for that comment that made me laugh xD
That very low rating was posted by a user named blackhile. He/she is no longer active on Algobox so I'm sure they won't mind that their low rating somehow vaporized. ;)
Just a suggestion for the smoothness of your roller chain. If you observe an actual roller chain, there are not only hinges to connect the outside pieces together, but there is actually a cylinder that rolls where the chain collides with the sprocket. If you do not believe me, look at a bicycle chain and observe how it rolls when you touch it in the middle. Your layer that collides does not actually roll, but the hinges allow it to go around the sprocket. If you add an axle that allows the circle that collides with the sprocket to actually spin, You would have a much more realistic roller chain. That is why they are called roller chains! Because there is a roller in the middle of each segment of the chain, not just hinges that let the pieces bend up or down. Just a suggestion to make that chain look perfect.
Last edited at 2016/01/17 07:48:25 by isodecryptor
Thanks for the suggestion. I agree with everything you said, but I'm not going to add rollers or extra hinges for the following reasons.

1. The chain circles are friction-less, so they function exactly the same as rollers.
2. Adding rollers would not change the outside appearance of the chain.
3. Adding rollers would increase the body count and slow down the simulation.
Is there any way you could explain to me how I could add it to yours and use it for myself to see if I notice any difference? I know having more hinges means more calculations but I am just curious.
Because your chain has what appears to be a lot of jitters and I am uncertain why these forces are clashing with each other. Especially seeing as how it was so well measured.
Q: Is there any way you could explain to me how I could add it to yours?
A: Make a few links at 0.5 pitch and then keep cloning until you get a long chain.

Q: Because your chain has what appears to be a lot of jitter.
A: The sample chain in this scene is 20 meters long. The chain and sprockets should probably be scaled down before using. I didn't notice any jitters, but if you see some then increasing sim.frequency might help.
Last edited at 2016/01/18 01:26:25 by s_noonan