Transmission for a motor-powered device with selectable outputs

A surgical instrument comprising a transmission comprising:

• a motor input;
• a first output of the surgical instrument that is drivable by the motor input;
• a second output of the surgical instrument that is drivable by the motor input;
• and
• a planetary gearbox operably connecting the motor input with the first output and the second output and comprising:
• a first stage ring gear engaged with the first output;
• a second stage ring gear engaged with the second output;
• and
• a lock selectively engageable with at least one of the first stage ring gear or the second stage ring gear, the lock having (i) an unlocked position allowing the at least one of the first stage ring gear or the second stage ring gear to power at least one of the first output or the second output and (ii) a locked position that stops rotation of the at least one of the first stage ring gear or the second stage ring gear to lock at least one of the first output or the second output.

A method of operating a motor-powered device comprising:

• controlling a lock such that the lock is engaged with a first stage ring gear and disengaged with a second stage ring gear;
• powering a first output engaged with the first stage ring gear;
• locking a second output engaged with the second stage ring gear;
• controlling the lock such that the lock is engaged with the second stage ring gear and disengaged with the first stage ring gear;
• powering the second output;
• and
• locking the first output.