What do you guys think is the best gear ratio for the tray pusher considering speed and strength?
Maybe 1:5, you should go on youtube and try getting info from there.
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Definitely 7:1, with red motors. 5:1 can be made to work but it’ll struggle past 9. 7:1 is the way to go.
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we do a very strong gear ratio but im not sure what the gear ratio is ill send a pic
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That’s 21:1. If you have a green motor, it’s the equivalent of 10.5:1 which isn’t bad, but with a red it’s pretty slow.
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we use a red motor and run it at 90% speed
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It hugely depends on your overall geometry. Try our calculator.
When it comes to speed, lower part of the trajectory is limited by the torque needed to raise the cubes, while the upper part needs to slow down to match the speed (kinetic energy) of the cubes vs. the rest of the potential energy needed to raise them.
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We use a 25:1 with dual torque motors. It isn’t that slow and honestly gives us just the right speed where we don’t take absolutely forever but cubes don’t get thrown around.
But we should probably use less torque.
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We use a 15:1 with a single green(200 rpm) motor, so it’s quite fast lol
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why didn’t you just use 7:1 with a 100rpm motor?
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We have a 7:1 with a 100 rpm motor and we found that it wasn’t enough to lift 9 cubes. We are currently prototyping 15:1 but we haven’t completely implemented it yet.
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I promise 7:1 with a 100rpm motor can tilt 9 cubes easy. Mine can tilt 10 no problem. I would look to improve the geometry of your tray, that’s why it can’t tilt 9.
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I feel that a 7:1 100 rpm will start to struggle as you approach the double digits. While it can still tilt 12 cubes or even more (especially with rubber band assistance), the motor begins to burn out after multiple stacks.
However this is not an issue in an actual tournament round since you will not have time to stack more than 3 stacks maximum and I’ve found that my motor burns out after 5 (without banding). Banding could probably bump up the maximum number of stacks to 6 or 7
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Yeah from what I’ve seen a 7:1 will put up a maximum of 12 cubes, and that’s with help from rubber banding.
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7:1 with good tilter geometry is the way to go. It is very fast and if you do it right you can tilt upwards of 12 or more
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1:7 200 can do 10 cubes if your geometry is solid. Making sure your tilter has good mechanical advantage is key.
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sometimes it’s easier/more space efficient to go with a higher gear ratio than perfect geometry tbh.
1:11.6 100 rpm is a good ratio, so is 1:21 200 rpm. if you want more strength 1:15 100 rpm or even 1:21 100 rpm can be a good option.
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Yeah but that’s insanely slow. Plus, compound gear ratios have more room for error, such as slippage, gears snapping, and stuff like that.
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Yeah I wouldn’t use 1:21 cause when you want to stack in the unprotected zone you won’t be able to, and it is a much larger gearbox than 1:7. When we had ours, we had trouble getting it to work well with low strength axles because it was a wide gearbox, and so the gears skipped. It could be much better with 200 rpm though.
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