phase delay in PID controlled vi

Hello,

I have a question regarding PID controllers.

I use a PID controller in Labview (Windows, no access to real-time) within a timed-loop to have as much deterministic execution as possible (loop period 3 ms). 

I am trying to impose a current to a voice coil motor in order to control its motion in a sinusoidal fashion. 

As you can see in the figure (ignore the green curve), the actual position of the motor (red curve) is phase shifted with respect to the desired sinusoid position (white curve). 

What can I do to correct for that? 

Thanks in advance,

Nikos