Measuring device and program

A non-transitory computer readable media which non-transitorily stores a program causing a computer to function as a measuring device for measuring, with respect to a measuring instrument for measuring a length of a cutting tool attached to a machine tool, a distance from a reference position of the machine tool to a tool detection position of the measuring instrument,

• the program causing the computer to function as:
• a movement control unit configured to control movement of a standard tool having a known length attached to the machine tool;
• a detection unit configured to detect a detection signal indicating the tool detection position, output by pressing down of the measuring instrument;
• and
• an identification unit configured to identify the tool detection position of the measuring instrument based on a position of a tip of the standard tool at a timing when the detection signal is detected,
• the detection unit being configured to detect the detection signal indicating that the tip of the standard tool exists within a tool detectable range including the tool detection position,
• the movement control unit being configured to move the standard tool in a direction away from the measuring instrument to change a state in which the detection signal is detected by the detection unit to a state in which the detection signal is not detected by the detection unit, and then move the standard tool toward the measuring instrument to change to a state in which the detection signal is detected again by the detection unit, and
• the identification unit being configured to identify the tool detection position based on a position of the standard tool at a timing when the detection signal is detected again, wherein
• the detection unit is configured to detect a timing of switching to a state in which the detection signal is not detected by the detection unit in the movement of the standard tool in the direction away from the measuring instrument,
• the identification unit is configured to identify, as a first detection limit position, a position of the tip of the standard tool at the timing of switching, and
• the movement control unit, when the standard tool is moved toward the measuring instrument, is configured to restrict the tip of the standard tool from moving beyond the first detection limit position and by a first predetermined distance or more.