Press Z- or Z+for a long time(about 3~4s),the Z axis will always go down/up;Press the short time is noraml

1.Possible cause analysis of failure:Reaction delay,see if the Z axis parameters are correct.
2.Solution:In the manufacturer’s settings,check the Z axis parameters,mainly the maximum speed,take-off speed,accleration,and emergency stop acceleration is not adjusted.Reset these parameters.