Apparatus of manufacturing optical fiber and method of manufacturing optical fiber

A method of manufacturing an optical fiber performed by an apparatus of manufacturing an optical fiber, the apparatus being configured to wind the optical fiber onto a bobbin, the optical fiber being drawn from a drawing furnace configured to heat and soften a glass preform and being coated with a resin;

• on a path line from a capstan configured to take up the optical fiber to the bobbin provided downstream of the capstan, a guide roller configured to guide the optical fiber, a dancer roller unit configured to apply a tension to the optical fiber, and a tension measuring unit configured to measure the tension of the optical fiber being provided and only the dancer roller unit is a roller unit having a drive source;
• the guide roller being rotatably mounted on a fixed shaft attached to a fixed wall;
• the dancer roller unit including a dancer roller around which the optical fiber winds, and a tension adjusting mechanism configured to adjust the tension to be applied to the optical fiber by the dancer roller;
• driving of at least one of a bobbin motor configured to rotate the bobbin and the tension adjusting mechanism being controlled by a tension control device, the tension to be applied to the optical fiber becoming a predetermined tension, the method comprising:
• measuring the tension applied to the optical fiber by the tension measuring unit;
• and
• adjusting a tension to be applied to the optical fiber by controlling driving of at least one of the bobbin motor and the tension adjusting mechanism by the tension control device based on the tension applied to the optical fiber and measured by the tension measuring unit.