What should I do if there is a cracking sound when pressing the board to be tested?

What should I do if there is a cracking sound when pressing the board to be tested?

What should I do if there is a cracking sound when pressing the board to be tested?

The press needs to be adjusted to enter the buffer, and the press needs to be buffered to a soft press when the end of the press reaches the plate to be tested. Pressing the board to be tested quickly and hard will cause the board to be tested to vibrate and rebound, crushing the board to be tested.