Noise Problem

Hi all
I'am tunning a Rutex R2020 I've just recieved , I placed it on the
first slot on the motherboard (for x axis) the other two slots have
the two R2020 for y and z axis . The y and z axis were working
perfectly during the past month of testing .

The problem is that once I plug the encoder to the x axis drive the
three axis stops moving and if move they move with a very big error
(non stable ), if I un-plug the x axis encoder the two other axis ( y
& z) restarts moving perfectly.

I'am using quality type shielded encoder cables
I replaced the encoder and the encoder cable with the ones on the y
drive but the same problem.

I think there is a very big noise problem since it affects the y and z
axis .



Any help, Ideas ?