Indicator mechanism for an actuator controlled surgical instrument

An instrument comprising:

• a shaft extending between a proximal end portion and a distal end portion;
• an end effector coupled to the distal end portion of the shaft;
• a control mechanism coupled to a proximal end portion of the shaft and configured to transmit force to control the end effector, wherein the control mechanism comprises:
• a base,
• a housing coupled to the base,
• an aperture defined in the base,
• a rotatable driver disk coupled to the base, wherein the rotatable driver disk is configured to be driven by a motorized actuation force,
• a visual indicator coupled to the rotatable driver disk, the visual indicator being covered by the housing and visible through the aperture, and
• a detent mechanism configured to hold the rotatable driver disk in differing rotational positions, the detent mechanism comprising:
• one or more first detent features on an elastically deflectable member coupled to the rotatable driver disk, and
• one or more second detent features on the base and configured to engage the one or more first detent features, wherein engagement of the one or more first detent features with the one or more second detent features holds the rotatable driver disk in respective rotational positions of the differing rotational positions.