LA504 roll back angle improvement?

[CDN Farm Boy]

You can't ever get both things at the same time, linkage or not. Pick one or the other.

Really? The way I see the linkage moving (visualizing in my head) allows much more movement. I've got to go to the dealer and cycle a few and also draw it out in CAD to confirm.

Perhaps I'm wrong but what's the point of the added complexity of the linkage if not to gain additional travel?

 

[LD1]

You can get more travel. But at a loss of power. That's what he is saying.

With anything hydraulic, given a cylinder size, range of travel and power are near infinite. But are inversely proportional. As travel goes up, power goes down and vice versa.

 

[CDN Farm Boy]

I understand that completely with a non-linkage design. I thought that the point of using a linkage was the added complexity of the design was to not sacrifice either. If I'm wrong, it wouldn't be the first time

 

[LD1]

I would say you are wrong.

The linkage is there to give more range. While each different design might yeild a different result.

Its not a simple equation. It is always difficult to convert a hydraulic force from a cylinder into a rotating motion. If you were to create a force graph for curling, it wouldn't be constant. Rather an arc. Near it's limits it would have the least power. In the middle of the range, it would have the most.

Let me give a simple hypothetical. Let's say your current setup allows for 140 degrees of rotation. Which would translate into a given distance, let's say 70" of physical movement at the cutting edge.

Now you add a linkage and give the bucket 180 degrees rotation. That would translate into more movement, let's say 90".

So now you are asking the same cylinder to move a load farther. The cylinder would have less mechanical advantage. Which means less power.

For every inch the cylinder moves, you are asking the load to move farther.

 

[CDN Farm Boy]

Thank you muchly. That does help me to understand. Not the end of the world, just another factor to consider.