Throwing Problems/Motors

[Jibri Wright]

Originally Posted by stretch851

Yes our pivot is three foot off the ground. our arm is curved so that it's height/length(frame to pivot, dy) is about two feet. Oh what does the 1:1 ratio do? We figured a 1:1 ratio was good.

The ratio isn't strong enough. Changing the pivot pulley will give you a larger gear reduction. You probably don't even need to change it that much because the gear ratio of the gearbox will be multiplied by the gear ratio of the pulley.

[Chris Fultz]

do you have a sketch or picture of you set up? You can probably get some specific help if you can show the set up, the weight of you mechanism, how much it travels (angular movement) and how fast you need it to move.

[stretch851]

Sorry I just figured out how to attach the file. We know that the hex shaft will turn 120 degrees before releasing the ball and that our plate attachement+throw arms weigh 5 lbs. We were expecting 24 m/s to obtain a 7 ft sweet spot.