SolidWorks Basic Motion.

Hello,

I have recently started working on SolidWorks Animation/Basic Motion and have been working on it for the past week. When applying 'Gravity' in Basic Motion module, I need the gravity to be activated/unsupressed after a certain time interval; like I would for a motor. SolidWorks does not allow me to define the time interval for gravity here. Can someone please guide me as to how I can achieve the above said results with SolidWorks Basic Motion?

Thanks.

SolidworksMotion Studies