Supporting 40lbs Arm with Motor?

[TheKeeg]

Originally Posted by Ether

So when you said in your previous post that "we mounted a sprocket on the end of our winch. There is then a pin that inserts in the teeth/grooves of the sprocket" you did not mean that the sprocket was connected to the winch, but rather to the arm? So the winch can unwind while the arm is locked in place by the pin and sprocket?



Are you saying that the winch acts as as the hard stop? Is the impact load transferred to the gearbox?

No. The sprocket is mounted on the winch. There are two brakes/locks. One on the winch and one on the catapult. The Winch lock with the pin and sprocket engage whenever the winch is not moving so that it cannot back drive. When the catapult is locked in position, the winch can unwind. The load is on the axle, but it is very supported.