After the adjustment, it was decide

After the adjustment, it was decided that from August 15, 2019, the adjustment of white columns on the support porous plates of the same tooling must be handled in accordance with uniform rules to prevent unreasonable white column positions from causing varying degrees of damage to the product plates.The selection rules for the placement of white columns are as follows:1. The placement position must be determined whether there is a device or not. If there is a device or an optional device, the white column shall not be placed.2. White columns shall be added in consideration of the distribution of test points of the tested products. If the test points of the following layer are too concentrated, white columns shall be placed in the corresponding position of the upper layer.3. The position of the white column must ensure that the product board is always parallel to the level of the ground, and the product board cannot be tilted.Notes:1. Different perforated plates may have different errors. Some errors are allowed, but the approximate position should be determined.2. For different versions of the same tool, the upper layer of the device may be changed, and the position of some white columns can be fine-tuned according to the actual situation.3. This document is written for the tooling of Tongfang Micro. The location of white columns is shown in Figure 1.1, and the number of white columns is 15.