Re: Yaskawa servo motors

daveland@... wrote:

> From: daveland@...
>
> Thanks for the help
>
> The Motor has three black wires and one red. I will
> check continuity to the 4 brushes when I get home.
>
> The tach and encoder are both labeled , So I think I
> know how to hook them up.
>
> I just want to get the motor
> running and see if it is ok. It was sitting outside
> for a year or two mounted on the robot and got kind of
> rusty. It is in an explosion proof case ( totaly enclosed)
> and the brushes and bearings look good.
>
> It seems hard to turn by hand, but
> it moves with a pliers but feels tight. I think it just
> needs a bit of run-in after sitting.

Unless it has a reduction gearbox, that sounds bad. It should
turn freely by hand, with a drag of maybe 1-2 Oz-In. That
sounds like the bearings have rusted.

Jon