Having troubles building hook intake. Weve tried multiple gearings and sprockets. The only one that has worked alright is 200rpm with 6 tooth but it isnt fast enough for us. Any time we put a ring on the hook with any other gearing it just stops or slows down heavily. Any help
Judging from the information you have provided, it sounds like you have a friction issue somewhere in your system.
My recommendations:
- Put bearings on all axles
- Check your axles and structure to make sure that nothing is bent
- Try to prevent metal-on-metal contact, such as shaft collars grinding against structure
- Make sure your motors aren’t overheating
- If everything else fails, switch to ball bearings (if you have them)
(In the future, please send an image of your problem so that the forum can help you better.)
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Add some pictures we’ve tried fixing some friction and adding flex wheels at the end. We ran multiple different motors and this build is running a green motor geared to 300rpm
add a link to both chains, it could be that its just over tensioned, and 1 link can make a huge differenece
Both arent fully tensioned they are loose already
From the bottom photo I can see that you have done some kind weird chain work to power your hooks. Have you have a 600 rpm motor just power it directly at the bottom with a 12 tooth gear, and add a 12 tooth gear at the top. Also in the first photo I can see that you’re using 3 wide c-channels and the corners may be stopping the ring so change to 2 wide. You probably don’t need a tensioner if you use bigger sprockets, and also mech looks a bit too long, too far above the goal tip. You only want it just above the tip of the goal .
I think a way bigger problem than friction is the speed of your hook. The reason why 6 tooth sprocket worked is because the hook had a sharp turn causing the ring to flip on the goal. Also the 6 tooth may have worked since it may have been running faster. For example, if the other sprocket on the chain, e.g the bottom one, was a 12 tooth sprocket and it was being powered at 200 rpm, the 6 tooth sprocket would be running at 400 rpm, hence why it worked. To make a faster hook mech, I would recommend a 600rpm motor, (blue cartridge), powering the bottom sprocket and trial different sprockets for both ends. Also experiment with the angle of your hook mech as that may change how the ring gets pushed on the goal. If that doesn’t work, there may be something wrong with your hooks or your goal clamp, so experiment with those. And if you skill have no result, there are a lot of videos on YouTube of hook mech robots so look closely at those.
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We have worked out the kinks. But thanks we will work some of these into our design
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