Realted Blueprint

hey I m using VR Template. I have needle rotation on one machine, now i had created a button, in that without adding any input action when i pressed or overlap on the button through VR hands the needle should rotate. how to do that. I had tried but its not working.
here i m attaching the blueprint which i had tried.In this I had created Custom event for needle rotation timeline and lerp vector), and also an interact interface has been created. now i m in button BP in which the interact system used.