i recently bought and assembled the k8200 (my first ever 3d printer). Everything i did was according to the manual except the y axis placement. If i want to control the axis via repetier host the z axis is vibrating, but if use the home function it works normally. to search for the error, i resolderd the z axis and i exchanged the stepper motor driver. here is a link to the video: https://1drv.ms/v/s!Aky0xdCf6DbEqBtjYcTtlGhKeX9g
now i dont know furtherů