Why do bows jump when played?

ruby

Can anyone explain to me why certain bows jump in an undesirable way when played? It probably has something to do with the camber. Are there any fixes for this?
Thanks much

ARod

The player's lack of skill.

fiby

I've got two fixes to offer:

-hair tension too high

-irregularieties in camber and/or straightness

chin

Bad camber, bends in the bow, and yes, too much tension. Also you might want to try a heavier bow. If you need to tighten the bow to where there is more space between the hair and the stick than the thickness of the stick in order to play without the stick grinding into the string, the bow probably has weak wood that will probably not respond the way you want to anyway if the camber is already correct.