| 摘要 |
A pointer measuring instrument capable of indicating ''zero'' on an indication panel by a pointer even if a play (backlash) is present in gears. The measuring instrument comprises a pointer reference position setting means (7a, 7b) for determining the reference position of the pointer (2). A control means (6) rotates the pointer (2) in the direction toward the reference position when a power supply to a stepper motor (6) is turned on, and performs a first drive for stopping the rotation of the pointer (2) when it receives a pointer reference position arrival signal from the pointer reference position setting means (7a). Then, the control means performs a second drive for moving the pointer (2) by a first angle from the reference position in the reverse direction away from the reference position, and performs a third drive for rotating the gear (3S) of a reduction mechanism (3) on the stepping motor (2) side by a second angle. |
