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Фрагмент инструкции
Turn Tension Adjustment Knob (1) counterclockwise (B) to decrease thread tension. Adjusting the Bobbin Thread Tension 1. Turn the Tension Adjustment Screw (2) clockwise (A) to increase bobbin tension. 2. Turn the Tension Adjustment screw (2) counterclockwise (B) to decrease bobbin tension. SKU 03914 Page 10 Changing the Thread Take-up Spring Stroke and Pressure Changing the Thread Take-up Spring Stroke and Pressure Loosen Set Screw (2). 2. To increase the stroke, turn the Tension Knob Screw (3) clockwise (A). 3. To decrease the stroke, turn the Tension Knob Screw (3) counterclockwise (B). 4. Loosen Set Screw (2) and pull out the Tension Arm (5). 5. Loosen Set Screw (4) and remove the Tension Knob Screw (3). 6. Turn the Tension Knob Screw (3) clockwise (A) to increase pressure; or turn counterclockwise (B) to decrease pressure. 7. Replace Tension Knob Screw (3), tighten Set Screw (4), and replace the assembly. Setting the Hand Lifter 1. To stop the machine with its Presser Foot up, turn the Hand Lifter (1) up (A). The Presser Foot will go up about 1/4 inch and stop. 2. To set the Presser Foot to its original position, turn the Hand Lifter (1) down (B). Using the Knee Lifter, you can get the standard Presser Foot lift of about 1/2 inch. Setting the Presser Foot Pressure 1. Loosen Nut (2), and turn the Presser Spring Regulator (1) clockwise (A) to increase Presser Foot pressure. 2. To decrease Presser Foot pressure, turn the Presser Spring Regulator (1) counterclockwise. 3. After adjustment, tighten Nut (2). Adjusting the Feed Timing 1. Loosen Set Screws (2) and (3) on the Feed Eccentric Cam (1) and properly position the Eccentric Cam. Retighten the Set Screws. 2. To advance the feed timing in order to prevent uneven material feed, move the Feed Eccentric Cam up (clockwise). SKU 03914 Page 11 3. To delay the feed timing in order to increase stitch tightness, move the Feed Eccentric Cam down (counterclockwise). Adjusting the Height of the Feed Dog The Feed Dog is factory adjusted so that it juts out from the Throat Plate surface 0.8 mm to 0.9 mm. If the Feed Dog juts out too much, puckering may result when sewing lightweight materials. To adjust the height of the Feed Dog: 1. Loosen Screw (2) of Crank (1). 2. Move the Feed Bar up or down to make the adjustment. 3. Tighten Screw (2), being careful not to overtighten. Adjusting Needle-to-hook Timing 1. Turn the Hand Wheel to bring the needle bar down to the lowest point of its stroke. 2. Loosen Set Screw (1). 3. When using a DBX1 needle, align to marker line “A” on the needle bar (2) with the bottom end of the needle bar lower bushing (3), then tighten Set Screw (1). When using a DAX1 needle, align to marker line “B” on the needle bar (2) with the bottom end of the needle bar lower bushing (3), then tighten Set Screw (1). 4. When using a DBX1 needle, loosen three Hook Set Screws, turn the Hand Wheel, and align the marker line “B” on the needle bar (2) with the bottom end of the needle bar lower bushing (3). When using a DAX1 needle, align the marker line “D” on the needle bar (2) with the bottom end of the needle bar lower bushing (3). 5. After making the adjustments in steps 3 and 4, align the Hook Blade point (5) with the center of the needle (4). Provide a clearance of .001” to .004” (0.04 to 0.1 mm) between the needle and the hook. This clearance is less than 1/64” (almost touching). Securely tighten the three Set Screws. If the clearance is too small, the tip of the hook will be abraded. If it is too large, it will lead to skip over. SKU 03914 Page 12 Adjusting the Presser Bar Height Adjusting the Presser Bar Height . Loosen Set Screw (1) and manually adjust the Presser Bar height, and the angle of the Presser Foot. 2. After adjusting, securely tighten the Set Screw (1). Adjusting the Thread Take-up Stroke 1. When sewing heavy weight materials, move the Thread Guide (1) to the left (A) to increase the length of thread pulled out by the Thread Take-up. 2. When sewing lightweight materials, move the Thread Guide (1) to the right (B) to decrease the length of thread pulled out by the Thread Take-up. 3. The normal setting is when the marker line “C” on the Thread Guide (1) is aligned with the center of the screw. Adjusting the Height of the Knee Lifter The standard height of the Presser Foot lifted using the Knee Lifter is 0.39 inch (10 mm). 1. To adjust the Presser Foot lift up to 0.5 inch (13 mm), adjust the Screw (1). 2. When the Presser Foot lift is adjusted over 0.39 inch (10 mm), be sure that the bottom end of the Needle Bar (2) does not hit the Presser Foot (3). This can be manually checked by turning the Hand Wheel. Maintenance 1. Machine adjustments should only be performed by a qualified technician. 2. Check the oil level weekly when the machine is used daily. Add sewing machine oil as required to the high level marking. 3. Clean the machine with a clean, damp cloth. Do not use solvents or thinners. 4. When not in use, cover the machine and store in a ...