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DE: Screwdriver is moving in and out continuously
If one of the screwdrivers is moving in and immediately out, there can be a problem with sensor or machine limitations
If the screwdriver is reacting like this, there can be a problem with a sensor for "screwdriver out".
What also must be checked is the angle of the complete arm. It can happen that it is hitting a machine part and cannot go out completely to activate the sensor.