Surgical instrument comprising an orientation detection system

1. A surgical instrument assembly, comprising:

a handle;

a shaft, wherein said shaft defines a longitudinal axis, and wherein said shaft is rotatable relative to said handle about said longitudinal axis between a first orientation and a second orientation that is different than said first orientation;

an articulation joint;

an end effector rotatably attached to said shaft about said articulation joint, wherein the end effector comprises a first jaw and a second jaw movable relative to said first jaw;

an actuation driver positioned within said shaft, wherein said actuation driver is configured to move said second jaw relative to said first jaw from an open position to a closed position;

a motor configured to actuate said actuation driver;

an orientation detection system configured to determine the rotated orientation of said shaft relative to said handle; and

a control circuit configured to adjust the actuation of said motor based on the determined rotated orientation of said shaft relative to said handle, wherein said control circuit is configured to actuate said motor such that said actuation driver applies a first force to said second jaw when said shaft is in said first orientation, wherein said control circuit is configured to actuate said motor such that said actuation driver applies a second force to said second jaw when said shaft is in said second orientation, and wherein said first force and said second force are different.

2. A surgical instrument assembly, comprising:

a handle;

a shaft, wherein said shaft defines a longitudinal axis, and wherein said shaft is rotatable relative to said handle about said longitudinal axis;

an articulation joint;

an end effector rotatably attached to said shaft about said articulation joint, wherein said end effector is rotatable relative to said shaft between a first orientation and a second orientation, and wherein said end effector comprises a first jaw and second jaw movable relative to said first jaw;

an actuation driver positioned within said shaft, wherein said actuation driver is configured to move said second jaw relative to said first jaw;

a motor configured to actuate said actuation driver;

an orientation detection system configured to determine the rotated orientation of said end effector relative to said handle; and

a control circuit configured to adjust the actuation of said motor based on the determined rotated orientation of said end effector relative to said handle, wherein said control circuit is configured to apply a first force to said second jaw when said end effector is in said first orientation, and wherein said control circuit is configured to apply a second force to said second jaw when said end effector is in said second orientation, and wherein said first force and said second force are different.

3. A surgical instrument system, comprising:

a housing interface comprising a motor;

a shaft assembly attachable to said housing interface, wherein said shaft assembly comprises:

a shaft defining a longitudinal axis, wherein said shaft is rotatable about said longitudinal axis between a first orientation and a second orientation that is different than said first orientation;

an end effector attached to said shaft, wherein said end effector comprises a first jaw and a second jaw movable relative to said first jaw;

an actuation driver positioned within said shaft, wherein said actuation driver is configured to move said second jaw relative to said first jaw;

a rotation orientation detection system configured to determine the rotated orientation of said shaft relative to said housing interface; and

a control circuit comprising a motor control program configured to run said motor, wherein said control circuit is configured to adjust said motor control program based on the determined rotated orientation of said shaft relative to said housing interface, wherein said control circuit is configured to apply a first force to said second jaw when said shaft is in said first orientation, wherein said control circuit is configured to apply a second force to said second jaw when said shaft is in said second orientation, and wherein said first force and said second force are different.

4. The surgical instrument system of claim 3 , wherein the control circuit is configured to adjust a rate of actuation of said actuation driver.

5. The surgical instrument system of claim 3 , wherein the control circuit is configured to adjust a stroke length of said actuation driver.

6. A surgical instrument system configured for use on a patient, wherein said surgical instrument system comprises:

a surgical instrument, comprising:

a shaft; and

an end effector attached to said shaft; and

a control circuit configured to:

determine the orientation of the patient; and

adjust a motor control program of said surgical instrument based on the determined orientation of the patient.

7. A surgical instrument system, comprising:

a handle comprising a motor and a trigger configured to actuate said motor;

a shaft extending from said handle, wherein said shaft comprises:

a rotatable shaft;

an end effector attached to said shaft; and

an actuation driver;

a rotation orientation detection system configured to determine the rotation orientation of said handle relative to gravity; and

a control circuit configured to adjust a force required for a user of said surgical instrument system to actuate said trigger based on the determined rotation orientation of said handle.

8. The surgical instrument system of claim 7 , wherein said control circuit is configured to reduce the force required to actuate said trigger when said handle is determined to be inverted relative to gravity.

9. The surgical instrument system of claim 7 , wherein said control circuit is configured to increase the force required to actuate said trigger when said handle is determined to be inverted relative to gravity.