Rotating force

[meolo2002]

Sorry about writing about it again, but reply does not work.
I want to apply a time radial rotating force to a node.
Every 3 seconds the force turns of 360 degs about the node.
To give an idea the field should have a similar formula:

X=F*sind(360/3*'t)
Y=F*cosd(360/3*'t)
Z=0

i've tried to create a similar field but doesn't work...
any ideas?
Thanks

 

[meolo2002]

i'm a stupid
solved by splitting in two components