What are the repair cases for THK linear guides?
The close part of the THK linear guides, in addition to the improper operation of our operators,
causes inevitable malfunctions, but it does not rule out that external factors or human factors will
cause some faults. What is the type of THK rail maintenance? Explain the THK linear guide fault repair
(1) Maintenance motor overheat alarm:
Fault phenomenon: x-axis motor overheat alarm
Analysis and processing: Motor overheat alarm, there are many reasons, in addition to the
servo unit itself, the cutting parameters may be unreasonable, it may also be a problem in the
transmission chain. The cause of the machine failure is that the gap between the linear guide insert
and the guide rail is too small and the adjustment is too tight. Loosen the inserting strip anti-loose
screw, adjust the insertion bolt to make the moving parts move flexibly, ensure that the 0.03mm plug
gauge can not be inserted, and then lock the anti-loose screw to eliminate the fault.
(2) The maintenance of mechanical vibration faults in travel terminals is obvious:
Fault phenomenon: When the machining center is running, when the x-axis displacement of
the worktable approaches the mobile terminal, obvious mechanical vibration failure occurs. When the
fault occurs, the system does not alarm.
Analysis and processing: The system does not alarm when the fault occurs, but the fault is
obvious. Therefore, the fault location should be determined by the exchange method on one side of
the x-axis servo motor and the screw drive chain. In order to distinguish the motor fault, the flexible
coupling between the motor and the ball screw can be disassembled and the motor can be checked
separately. The test results show that there is no vibration when the motor is running, and the fault
location is obviously in the mechanical transmission part. Remove the elastic coupling and use the
wrench to turn the ball screw to check the handle. Through the hand inspection, it is found that the
sensing resistance increases significantly when the x-axis displacement of the table is close to the
travel terminal. The workbench inspection was removed and it was found that the ball screw was not
parallel to the guide rail, causing vibration during mechanical rotation. Carefully repaired, adjusted,
reinstalled, and trouble-shooted.
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