Set Type: Professional set High-concerned chemical: None Material: Metal Model Number: External positioner Origin: Mainland China Features: 1: Pair your industrial sewing machine with a synchronizer to precisely control your sewing operation. 2: 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 Part name: External positioner 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 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 position, and then tighten the two screws. Package Contents: 1 x Holder 2 x Wrench 1 Set of Matching Accessories 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. Color: As Shown Material: Metal+Plastic Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.