servo motor and its driver are acting strange

[JAZZCNC]

Also If I turn off my controller as I start my motors at first all my Driver displays show the value if 00000 but, after few minutes the numbers on my Driver's Digital Display start to climb and/or Increase and all of a sudden at least one of the motors creates a sudden very Loud Sound and shake.

Like M_C says start with basics but also check Signal and encoder wire routing so not up against high voltage cables.

The creeping numbers will 99% be electrical noise on the input signals if the drives are setup to show position. But it's not recommended to enable the Drives without control being on, infact it shouldn't be possible in safe system.
The state of the incoming Signal is unknown without the control being in-charge and Your lucky the motors didn't take off because any straw voltage or pick-up of electrical noise could have sent false signals sending the motors shooting off.

Do you have power Line filters on the Drives as this will help with electrical noise.?
Is the frame Earthed.?

Also as I've mentioned before the way you are sharing one Motor Output for two drives isn't good and could be sending things off track.!

[jhonansaro]

Hi there

Thanks a lot for your replies, and advice.
As you mentioned, I have done some silly mistakes and 2 of my encoder cables were misplaced.
and after I correct that mistake all is fine now.

regards
jhonansaro