liam said:
and another note - i believe that the PC is forced rotation aswell is it not? dave from waxit.com.au highlighted the difference as he has a PC - you apply pressure to the hitachi - is only orbits... pressure to the pc and it still rotates... thus more heat. that is my concept of forced rotation.
This is how I understand it.
A PC doesn't have Forced Rotation. But it does rotate more than most of its competitors.
A PC is a Dual Action Random Orbit machine. What that means is that while the main centre spindle is turning, a second off-centre spindle is rotating the backing plate.
A similar movement is performed when the earth rotates around the sun, and the moon rotates around the earth. Thats a dual action rotation, in PC terms.
If you apply enough pressure to a PC it will stop its secondary rotation but will maintain its primary rotation...it will start to jiggle rather than orbit randomly. The pad won't visibly rotate, just jiggle . I've made it do that, but it takes some work.
Due its high torque motor and very long pad throw (best around) its hard to stop its dual random orbit action.
Machines with less power and a shorter pad throw take much less to inhibit the pad rotation.
Compared those machines, a PC will look like it has forced rotation, but it doesn't.
The Makita's Forced Rotation is a mechanism which locks the secondary off-centre spindle so that it can't stop rotating under any pressure. Its half way to rotary without using a circular action making it more powerful than a PC but less dangerous than a rotary (in unskilled hands).
That's my take on it, but I'm frequently wrong.
I hope this helps. :bigups
