Tilting lift

So my lift is skewing to the side even though I have cross bracing and other supports. I’ve been trying to fix this for some time with no luck.image image

If u want more pictures, pls request. Also the numbers on the motors correspond to their port and have no other significance

are the arms straight when all the way down?

you could try bracing the back of your arm and then (I dont know if this will help b/c i have never tried it) cut of as much metal off the top of the towers as possible and connect the gears with standoffs. after that you could add more bracing to the arm. The problem might be these standoffs though. try adding more maybe.
31 PM
I don’t have a complex tray so I haven’t tried doing any of this.

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Stand offs don’t really have the structural integrity that would make them reliable to hold heavy weights. You may want to attach a c channel to the gear and attach the arm that way or worst case, add more standoffs and rubber bands to the side of the lift not powered by the motor.

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No they are not

20 char

you should definitley band this lift, that will at least help the problem a little bit, and if you add 2 tiny bars beneath the 2 bar to make it a 4 bar you’ll be able to add more bracing. bracing the top and bottom of the lift can also help.

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honestly, it just looks like a spacing issue to me
can you post a picture of the robot from behind so I can see the other side?

image

like @kmaster said, standoffs are not a great choice for attaching things that will experience high torque

I would also recommend trying to support the HS shaft your big gears are mounted on in more than just two places. This would help a lot with stability. Try to have the axle go all the way across the back of the bot and support it with vertical posts on both sides of where the arms are attached

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I dont know how affective this would be but you could also also brace the arm with a vertical x-brace from top to down. That could fix the problem along with banding (which you should do anyways).

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so you have a 12 tooth driving one of your gears and the other side is just kinda hanging there. you might want to add a 12 tooth to the other side as well. think of lifts like equations, whatever you do to one side you will probably want to do it to the other side as well.

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that would probably just add friction and actually make the problem a little worse.

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Eh maybe. The problem is his lift is axles and gears are at an angle. Although I didn’t see the way his motor is. I personally run a powered axle though the entire back of my lift.

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I just built arms on my bot and we did the same. otherwise, the arm not supported by the motor would sag too much, even with bracing

The towers should be on the outside of the arms, not the inside. Is there a reas0n they cant be on the outside?

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Try moving the motor to the other side of the 12T pinion and run the axle under both 60T gears. This may help equal out each side.

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The motor isn’t on the outside because the arm would hit the motor. I didn’t have the range of motion I wanted

Maybe bracing it like this would help?
31 PM

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