VMIVME-7696-660 What is the reason why Siemens servo controller has no display and alarm failure? Mechanical causes.
VMIVME-7696-660 Check the servo motor and the driver position detection element, control module or electrical connection and other aspects of the problem, to eliminate the server maintenance problem: through the exchange method to judge. First, the power amplifier of X axis and Z axis were exchanged, and the alarm of large X axis follow-up error still appeared, indicating that there was no problem with the power amplifier of X axis. The power line of the two-axis servo motor is exchanged. In order to ensure the integrity of the closed loop of each axis, the feedback line of the two-axis pulse encoder is also exchanged. In fact, this operation is equivalent to the exchange of two motors,
but it is inconvenient to move the motor. As a result, the X axis can be operated manually, and no alarm appears, and when the Z axis is operated manually, the same fault situation as the previous X axis appears, that is, not only the Z axis does not move, VMIVME-7696-660 but the alarm of “411 follow-up error large Z axis” appears. This is sufficient to indicate that the server maintenance fault is on the servo motor side. In the static measurement of the X-axis motor, it was found that in the socket connected to the power line on the motor, one phase of the three-phase power supply failed to connect to the motor, resulting in a lack of phase of the X-axis motor, and the servo motor could not move, resulting in the above fault. Straighten the bent pin, power on the motor after the motor connection is restored to normal, run the X axis and Z axis again, then all the normal server maintenance overload fault: usually when the moving load is too large, frequent positive and reverse movement, poor lubrication of the transmission chain or wedge iron, VMIVME-7696-660 guide rail, motor power line grounding and other reasons, will cause the servo motor current is large. Motor temperature is too high or motor overload alarm. During the operation of CNC machine tool, the fault of servo drive control unit, drive component and motor itself will also cause overload alarm.
Server maintenance overrange fault: VMIVME-7696-660 the movement exceeds the soft limit or hard limit switch position set by the server software, an overrange alarm will occur, and the alarm capacity will generally be displayed on the servo driver display of the CNC machine tool. If the alarm shows hard overdrive, follow the server service manual and electrical schematic diagram.