Surgical instrument with motor disengagement in response to excess torque

A surgical instrument comprising:

• a main body configured to receive a plurality of end effectors;
• an end effector releasably attached to the main body and characterized by one or more parameters specific to the end effector;
• a motor assembly comprising a motor with a shaft;
• a firing member coupled to the shaft and the end effector such that a rotational movement of the shaft is configured to cause a longitudinal movement of the firing member to actuate the end effector during a firing stroke;
• and
• a control circuit configured to, before driving the firing member to actuate the end effector by the motor assembly,
• identify the end effector based on a signal received from the end effector;
• in response to the end effector being identified,
• obtain the one or more parameters specific to the end effector, the one or more parameters comprising at least one of:
• a desired firing speed of the firing member,
• a desired retraction speed of the firing member,
• a desired stroke in which the firing member is to travel,
• a maximum torque to be applied to the firing member by the motor assembly of the surgical instrument, or
• a maximum articulation angle if the end effector is an articulating end effector;
• and
• set a firing speed of the firing member based at least in part on a parameter of the obtained one or more parameters of the end effector to operate the identified end effector in a desired manner
• wherein the control circuit is configured to set the maximum articulation angle based at least in part on a parameter of the one or more parameters of the end effector.