Sometimes when using it, I feel that the accuracy of the cast iron platform has decreased compared to before. What's going on? In fact, due to the excessive load on the cast iron platform, it may tilt and overturn, resulting in a decrease in accuracy. How should we solve it?
In order to increase the rigidity of the flat plate, prevent it from overturning due to displacement, and prevent harmful deformation caused by excessive load, auxiliary support points are set up to help ensure the accuracy of the flat plate's use. The deflection caused by self weight does not affect the accuracy of the flat plate, so the support point is set closer to the edge, which basically reduces the risk of flat plate overturning. Some flat plates use four point support. During manufacturing (scraping or grinding) or use, these flat plates are inevitably supported on these three points at one time (these three points support harder) and then on another three points (the other three points support harder), causing the force points of the flat plate to be in an unstable state. However, the flat plate is not a rigid body, which can cause slight deformation of the working surface, resulting in unpredictable changes in the flatness value of the flat plate and exceeding the tolerance.