Robot controller and robotic system

A robot controller comprising:

• a memory configured to store a first value representing a position of a movable member detected by a position detector when a tool including the movable member and the position detector that detects the position of the movable member is detached from a robot or when the movable member moves to a predetermined position;
• and
• a processor configured to
• determine whether or not to allow the tool to be detached in accordance with a first difference between the first value stored in the memory and a second value representing a current position of the movable member detected by the position detector, and control the tool based on the first difference between the first value and the second value, or
• determine whether or not to allow the tool to be detached in accordance with a second difference between the first value stored in the memory and a third value which represents the position of the movable member and is obtained when the movable member is at the predetermined position, and control the tool based on the second difference between the first value and the third value.

A robotic system comprising:

• at least one tool;
• a robot including an attaching/detaching device configured to enable the at least one tool to be attached thereto/detached therefrom;
• and
• a controller configured to control the robot,
• wherein the at least one tool includes:
• a movable member;
• and
• a position detector configured to detect a position of the movable member, and
• wherein the controller includes:
• a memory configured to store a first value representing the position of the movable member of any one of the at least one tool detected by the position detector of the tool when the tool is detached from the robot or when the movable member of the tool moves to a predetermined position;
• and
• a processor configured to execute a predetermined process in accordance with a difference between the first value stored in the memory and a second value representing the position of the movable member of any one of the at least one tool detected by the position detector of the tool when the tool is attached to the robot or when the movable member of the tool moves to the predetermined position after the tool is attached to the robot.