BUT! some tips!
If you have problem with:
Layers,the first layer are good but the rest will move from the first layer and be like two diffrent positions!
Problems with motor heat!
problems with motors sound, it sounds and dosent move.
My tip!
Look up your accelration, it can be to high. repetier / slic3r have defoult acceleration on 3000 as are to much. try 1000-2000, if the motor try to go up in high speed to fast the belt will ripp over and the layer moves ( and layer one are always slower).
also if your motors are to heat try to turn the driver down. you do that by scruw on the ramps motor drivers. the little smal screw.
and the belt can't be to stretched. that will get problem with the motor gear teeth.