I cannot figure out the right gear ratio to lessen the strain on the motors. Below si what we have right now. The lift picks up the mogo but it is difficult as the mogo is heavy. How do i more effectively pick it up and lessen strain in motors.
what cartridges are you using on your lift motors?
100 rpm 1:7 would be an easy way to double your torque if you’re currently using 200 rpm, but with proper build, 200 rpm 1:7 with 2 motors should be fine.
Check that you don’t have any large amounts of friction in places you shouldn’t. You can also add some rubber bands to your lift in order to counter the weight of the lift itself.
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Not sure about cartidges, we just use whatever came with the V5 clawbot kit. I will try 1:7, thank you.
that would be the green 200 rpm ones.
you’re already using 1:7.
12 tooth gear : 84 tooth gear, simplifies to 1:7.
Try using some rubber bands, and check your lift for friction. You can do this by disconnecting the shafts from the motors, so the lift can free move. it should be quite smooth and effortless to move it without the motors.
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You should also look into strengthening your bracing- it appears from the pictures that you are using linear slide rail, which is not a good bracing piece. You should use at least 2-wide c-channel, and try 5-wide or x-bracing if the 2 wide doesn’t work.
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Rubber bands work GREAT!
Am I right?
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Yep!
And not just for your purpose, they also work for shooting at your friends!
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i dunno what ur talking about, it works fine on our bot 
also
I have noticed that our 1 motor 7:1 lift moves slowly down when raised with a mogo at max height even on motorhold
help
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And getting yelled at by your mentor.
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either triangular rubber banding or linear rubber banding?
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Holup, are there bearings on every single shaft? It looks like some of the shafts on your lift do not have bearings, and thus you are spinning a square peg in a square hole. Also, The vertical bar 2/3 the way down the arms, what is that doing? Just adding weight and friction? Because that’s what I think it is doing.
Edit: Also, rubber bands.
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Bro I think I found what you need:
On the topic of rubber band mounts, putting a few of them on your lift will help reduce motor strain tremendously, and make it easier for the motor to hold the weight of a mobile goal in the air.
here’s the way I’d recommend mounting one if you get the chance
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They all have bearings and the lift works if theres nothing on it.
On this note, I would highly recomend these videos:
The Kepler Electronics Guide to the DR4B
The Ultimate Guide to Bar Lifts
They go over lots of vital principles of building lifts including how to use rubber bands most effectively.
This video (by the same person) shows an example of the most effective type of rubber banding. In principle, you make a triangle as @BluePinningAgain described. When the lift is down, the triangle formed between the three vertices should be (pretty close to) a right triangle. When the lift is completely raised, you should try to make them form an isosceles triangle.
On another note, you don’t need a gear on the back of both lift arms. Since the 4-Bar is a parallel linkage, you only need to drive either the top bar or the bottom bar and the whole lift will raise. In theory, having a gear on the back of both bars won’t impact it but It could cause additional friction if any part is slightly misaligned. Since these gears are unnecessary, I would suggest removing them.
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While the gear isn’t necessary I disagree in saying its completely unnecessary. The second gear helps both sides stay in parallel and distribute the weight more evenly.
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