Need help with drivetrain gearing and gear positioning

VEX Robotics Competition Discussion V5RC > Push Back (25/26)
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I am trying to create a cad of my robot for this year. I am planning to do a 6m 55w drive at 450 rpm or something close. I am using 3 wide c-channels because I want to save space when mounting motors side by side. I don’t know how to mount the gear so that they will mesh. I want to use the smallest gears possible. How should I do this?

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First off, why are you using 3 wide? I know you said it saves space but at the cost of you having a heavier drivetrain, and motors overheating quicker. Also wouldn’t a 66 watt 450 rpm be better than a 55 watt due to the 5.5 watt motors having more friction. Also what wheel size are you planning to use?

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I agree with you saying it should be 450 on 66 watts because you have to do special gearing to get the 5.5 to have the same speed/tourqe of the regular 11 watt motors

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I think that 3 wide is completely viable. yes fine there may be a weight of a fly that is added, but if you are building vertical motors or have some weird gear ratio, it is fine.

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I was planning to use 3 wide because I want vertical motors. It saves space while still giving my code an easy way to work due to how I have programmed it. I should use 66w rather then 55w but i would have more motors to work with doing 55w. I’m doing double ltc intakes. I feel that it would be better then one because you can have 12 blocks rather then 6. How should I do a 36 to 48 or something close? Because of the weird gear positioning I might have to drill holes but I would really prefer not to.

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I’d say to try and offset your gears in a diagonal way to make room to make sure they all connect

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That is unfortunately hard to do because I am using 3 wide. 3 wide doesn’t have the row offset like the 2 wide has. I just need a gear ratio that gets close to 450 rpm and I think i’m going to do 6m rather then 5m.

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Catalogue of Drive Gearings

This should be useful

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Thanks, but I have already used that

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If you’re doing 55w, since the 5.5w motor only spins at 200rpm (no cartridges), if you want the gears to be as small as possible, you must do a compound gearing.

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I have already decided to not use 5.5s on the drive and only do it for the intake. That lets me have 6 11w for the drive and 4 5.5w for the intake. I have already settled on a design and I’m almost done cadding the drive. Just have to finish copying the right side to the left and then brace it and connect the sides

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