According to the crown block control method and
system and the crown block, a tilt angle sensor is arranged on a grabbing
assembly, and a plurality of rollers of a lifting
assembly are driven by independent driving motors respectively, so that when a transverse moving mechanism enables the lifting
assembly to stretch out, the tilt angle of the grabbing assembly can be detected through the tilt angle sensor; therefore, the
position error of the grabbing assembly can be determined according to the inclination angle, extension position compensation is carried out through the transverse moving mechanism, the horizontal position of the grabbing assembly can be more accurate, meanwhile, the grabbing assembly can be adjusted to be in the horizontal state through the multiple winding drums, and the working efficiency is improved. Therefore, the grabbing assembly can be in
butt joint with the front-
open type wafer conveying box on the
machine table more accurately, or it can be guaranteed that the front-
open type wafer conveying box grabbed by the grabbing assembly is kept in a horizontal state, the front-
open type wafer conveying box can be in
butt joint with the
machine table better, and the material taking and placing accuracy is improved.