text: <s>[INST] Powerflex 755 with PM motor - Effects if moise in encoder feedback readings Hi everyone For a PowerFlex 755 with PM motor with incremental encoder. If we have noise and/or encoder inaccuracies that affect encoder feedback over time will this jeopardize motor commutation over time? On the first start after a power cycle, we do the PM Offset test and the relationship between that angle and encoder feedback is good, so we have proper motor commutation. But eventually if the encoder feedback is not accurate for any reason over time, will we loose that relationship between the commutation angle and the encoder feedback? Will we lose proper commutation of the motor over time? Can this cause Overvoltage faults? What other effects cuald affect having this issue with the feedback? Thanks in advance [/INST] Hi, Check your encoder cabling route, it must be far away enough from AC power cable. Check with OSC on your encoder square wave output , to ensure encoder can send correct output signal. Terence \\n </s>