Homing problems

Im having an issue when I now hit the home button the extruder goes home and starts to violently shake and make noise.. Like its off track , I press start and all is good from there. but I never had this happen before , now it happens every time I press home. definatly should not be happing , and Im sure it will cause other problems down the road,
what should I do ? any idea's ? Thanks John

 

Have you checked all your end stop connections, both on the switches and on the ramps board?

 

Ill check that when I get home Thanks Galaxius