heeelllooo ronti and welcome
as t t says somthing running out of true
dont know to much about band saws
but things to check
unplug[although it wont work with the pannel open]open the panel to gain accses to the wheels check the blade for correct tighness check wheels are not sloppy and running true [rotate gently by hand in direction of rotation]and just look in general that every thing looks ok
check the motor housing and gearing if easily accsesable are ok[not loose]