Rubber bands & Standoffs

  1. 2 months ago

    91364T

    Oct 11 Woodland Hills, CA 91364T

    We are a learning team and we started using rubber bands on our 4 bar lift to help with the weight and positioning. However, it seems as if our standoffs or screws are bending. Is there a way to do the rubberbanding to prevent this or any other better method. We currently just have standoffs with the 4 sided pieces connected to keep the rubber bands from falling off.

  2. Crazycrabman

    Oct 11 Los Angeles California 6526 D
    Edited 2 months ago by Crazycrabman

    Depending on how much space you have you could reinforce the standoff with a short one-by making a triangle with the c-channel. You could also stick the rubberbands through the holes in the c-channel and add something to the end to keep it from coming out. The simplest solution, though, would be to have multiple spots to mount the rubberbands, rather than putting them all on one standoff.

    Also, I would consider switching to surgical tubing, as it keeps it's stretch much longer and is generally much easier to work with. We use it on our catapult and we've never had to replace it in the months we have been using it. It is also much harder to snap compared to rubber bands.

  3. sazrocks

    Oct 11 Arizona 2114V

    How many rubber bands are you using that your standoffs are bending?

  4. @91364T ; We are a learning team and we started using rubber bands on our 4 bar lift to help with the weight and positioning. However, it seems as if our standoffs or screws are bending. Is there a way to do the rubberbanding to prevent this or any other better method. We currently just have standoffs with the 4 sided pieces connected to keep the rubber bands from falling off.

    If you could post some pictures of the problem, it would be much easier to help you. Thanks!

  5. 91364T

    Oct 11 Woodland Hills, CA 91364T

    @Anomaly If you could post some pictures of the problem, it would be much easier to help you. Thanks!

    I currently do not have access to the robot but will do tomorrow.

  6. 91364T

    Oct 11 Woodland Hills, CA 91364T

    @sazrocks How many rubber bands are you using that your standoffs are bending?

    I am currently using 2 standoffs with 3 rubber bands on them.

  7. callen

    Oct 11 Braintree, MA, USA

    Keep the rubber bands as close to the c-channel / half-c channel / whatever lengths the standoffs extend from. The further out the rubber bands are on the standoffs, the more torque they cause.

  8. I think the best way to do it is to have a black bearing mounted on the arm with two screws on the outsides with the large white spacers. I hope you can figure out what I'm saying because I don't have a picture right now

  9. Blatherskite

    Oct 12 Austin TX 2158R

    You could try putting a lock nut on the screw or standoff that is holding the rubber bands. this has helped me a lot with tension issues like this in the past and helps keep things tight. -image-

 

or Sign Up to reply!