What could be the possible cause of abnormal noise or unstable feeling in the fixed plate?

The abnormal noise or unstable feeling of the fixed plate is usually caused by loose mechanical connections or support failure. The most common reason is that fasteners such as anchor bolts and adjustment shims loosen due to long-term vibration, resulting in impact and friction sounds between the platform and the foundation. In addition, cracking of internal reinforcement ribs or loosening of T-shaped groove inserts can also produce abnormal noise under stress.

The core issue is often the imbalance of the supporting system or the deformation of the foundation. Uneven support points, virtual contact of shims, or local ground settlement can cause uneven force distribution on the platform, resulting in a "seesaw" effect. Long term overload work, especially excessive local concentrated loads, may also cause slight plastic deformation of the platform itself or supporting structures, which can damage the initial stability.

Solution requires system troubleshooting: First, check and re tighten all anchor components, and calibrate the height of each support point with a level. If the problem persists, it is necessary to check whether the ground foundation is cracked. After excluding external factors, abnormal noise and instability are likely to point to internal damage (such as cracks) to the platform body. At this time, the machine must be stopped and professional personnel must be contacted for non-destructive testing. It is strictly prohibited to use it with defects.