1. Overtravel. When the feed movement exceeds the soft limit set by the software or the hard limit determined by the limit switch, an overtravel alarm will occur, and the alarm content will generally be displayed on the CRT.
2. Overload. Overload failures can be caused when the load of the feed movement is too large, the parameter setting is wrong, the frequent forward and reverse movements and the lubrication state of the feed drive chain is poor. This fault can be diagnosed by the machine itself, and an overload, overtemperature or overcurrent alarm is displayed on the CRT display. At the same time, on the feed servo module, the indicator light or digital tube is used to display the alarm information such as overload and overcurrent of the drive unit.
For example, when the machine tool is actually repaired, one of the axes of the machine tool cannot move, and the drive module 611UE will have an alarm of "608".
The following is the connection diagram of power module, power module, drive module and motor, so that we have a preliminary understanding of Siemens CNC system.
For 608 alarms, check the service manual to see that the output of the speed controller is at the limit (current limit or moment) for a long time.
In fact, most of the cases are overload or overheating alarms, first you can enter the system through "shift+system", "maintenance information", "drive information", "actual value of current after smoothing".
In normal processing, the actual value of the current is generally between 3% and 7%, and if it is greater than this value, there will be an overheating alarm treatment
1) The mechanical part can move, see if the current rises very quickly when the mechanical action is made, if so, it depends on whether the mechanical part is stuck there or insufficient lubrication and so on.
2) The mechanical part cannot be moved, and it is processed in two steps:
A disconnect the motor from the mechanical part, jog the motor to see if there is an alarm, if there is no alarm, the mechanical part is stuck.
b Disconnect the motor from the mechanical part, if there is an alarm, it is a problem with the servo module or the motor.
The way to distinguish between the motor and the servo module is to connect the power line of the X-axis motor and the X-axis signal feedback line to the top of the Y-axis servo module, and the Y to the X. Jog to see if the problem has been transferred, and if the problem has been transferred, it is the problem of the motor. If there is no transfer, there is a problem with the servo module.