Determining robotic surgical assembly coupling status

A robotic surgical assembly configured to be coupled to a robotic arm of a robotic surgical system and a surgical instrument, the robotic surgical assembly comprising:

• a carriage;
• a carriage housing releasably connectable to the carriage;
• a motor housing configured to house a motor pack for driving the surgical instrument, wherein the motor housing is releasable connectable to the carriage housing;
• an interface module configured to releasably secure the robotic surgical assembly to the surgical instrument;
• a series of interconnections defined by mating portions of the carriage, the carriage housing, the motor housing, and the interface module;
• and
• a control circuit configured to detect a fully engaged configuration of the mating portions based on the interconnections.

A surgical robot, comprising

• a robotic arm;
• and
• a carriage assembly configured to be coupled to the robotic arm and a surgical instrument, the carriage assembly comprising:
• a carriage comprising a first interface;
• a housing configured to receive a motor pack for driving the surgical instrument, the housing comprising:
• a second interface configured to engage the first interface to removably secure the housing to the carriage;
• and
• a third interface configured to engage a fourth interface of the surgical instrument to removably secure the surgical instrument to the carriage assembly;
• and
• a control circuit configured to:
• receive a first input indicative of a first full engagement status of the first interface with the second interface;
• and
• receive a second input indicative of a second full engagement status of the third interface with the fourth interface, wherein the second input is different than the first input;
• and wherein:
• the first interface comprises a first electrical contact;
• the second interface comprises a second electrical contact configured to contact the first electrical contact in the first full engagement status;
• the third interface comprises a third electrical contact;
• and
• the fourth interface comprises a fourth electrical contact configured to contact the third electrical contact in the second full engagement status.

A surgical robot, comprising

• a robotic arm;
• and
• a robotic surgical assembly configured to be coupled to the robotic arm and a surgical instrument, the robotic surgical assembly comprising:
• a carriage;
• a carriage housing releasably connectable to the carriage;
• a motor housing configured to house a motor pack for driving the surgical instrument, wherein the motor housing is releasable connectable to the carriage housing;
• an interface module configured to releasably secure the robotic surgical assembly to the surgical instrument;
• interconnections defined by interfacing portions of the carriage, the carriage housing, the motor housing, and the interface module;
• and
• a control circuit configured to detect a fully engaged configuration of the interfacing portions based on the interconnections.