Violin Tips - How to Prevent Bow Drifting on the Violin
Violin bow drifting happens for a number of reasons. It most commonly happens when you don't have a level instrument, which causes gravity to bring your bow out of place.
It is also very common that students are not working on keeping their bow straight. It is important to work on the bow plane as a beginner, which can be worked on by watching yourself play in a mirror.