Goal of the screwdriving task is either the application of a defined holding strength pre-load force) or the execution of certain adjustment- or dismantling processes.
Application of a defined pre-load force
The most important application case in the screwdriving assembly is the determination of a defined pre-load force. The pre-load force has to be determined in such a way, that on one hand the intended function is still a given and on the other hand, the allowable load of the screw-connection.
The most common problems are settling conditions of a joint and other assembly related fluctuations of the achieved pre-load force.