How to interpret gamepad-rumblers?

I'm experimenting with the rumblers on my gamepad and when I 'read' the gamepad (with JInput),

it finds 5 rumblers.

So I expected the gamepad to have two rumblers on each开发者_如何学编程 side and one in the middle.

However, that seems not to be true, because :

The rumbling always comes from one side, and;

If I let 3 or 5 rumblers rumble simultaneously, then the rumble is only a little bit stronger

than just one rumbler rumbling, not the expected 3 or 5 times stronger.

So I don't know what to think of this. Can someone explain how to interpret these

five rumblers (from a developer-perspective) ?

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Assuming you actually are activating all five rumblers, the explanation for not experiencing a five time increase seems to be that the first rumbler contributes significantly more to the rumbling of the pad than the remaining. This is to be expected unless the rumblers are positioned at completely unrelated (i.e. disjoint) positions inside the gamepad.

As for the positioning, as you (indirectly) say they, all seem to be positioned in one side of the game pad. Opening the game pad or acquiring a schematic will tell you where they are.

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On my gamepad (Logitech wireless wingman) there seem to be 2, one is a fine rumble, and one a stronger rumble, the way I handle it is to just rumble everything at a %age of what I want my max to be.