External Needle Positioner For Industrial Sewing Machines With Handwheel Fixed Screwed Spindle Motor External Needle Fixer Kit Features: 1: Pair your industrial sewing machine with a synchronizer to precisely control your sewing operation. 2: Needle stop up or down positioner, synchronizer for brushless motors of industrial sewing machines. 4: Only suitable for industrial sewing machines with handwheel fixed or screwed to the spindle. Not suitable for all machines, adapters may be required. Specifications: Part name: External needle positioner Size: As shown Material: Metal Color: black Positioning sensor installation steps 1. Remove the fixing screws at the end of the machine head pulley shaft. 2. Fix the accessory "connector" to the shaft end with the "connector screw". 3. Install the external sensor and tighten the two set screws to fix the positioning rod in the slot of the sensor. 4. Insert the sensor signal line into the sensor socket of the motor. 5. Start the motor and detect the needle stop position. If there is any deviation, first loosen the two set screws on the sensor, then turn the pulley (do not let the sensor rotate) to foralignthe needle position, and then tighten the two screws. Package Contents 1 x Needle Holder 2 x Wrench 1 Set of Matching Accessories Only the above package contents, other products are not included. Note: Light and different monitors may cause the color of the items in the picture to be slightly different from the actual item. The allowable measurement error is +/- 1-3 cm. _x000D_ _x000D_