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General| Stitch Options | Straight Stitch |
|---|---|
| Stitch Width | 0 mm |
| Needle Positions | 1 |
| Presser Feet | Walking Foot |
| Bobbin | Large Capacity |
Key operational metrics like speed, stitch length, and needle gauge.
Details of essential parts like needle type, hook, and feed mechanism.
Information on oiling system, bed size, motor, and pulley diameter.
Lists essential parts for machine setup, including hinge, motor, treadle, and belts.
Instructions for filling the main oil reservoir to the correct level for proper lubrication.
Details on lubricating the hook mechanism and checking oil gauges for proper function.
Explanation of the oil adjuster mechanism and how to stop oiling temporarily.
Step-by-step guide on how to correctly insert a needle into the needle bar.
Guidance on choosing thread types and twist for optimal sewing performance.
Instructions on how to correctly insert and remove bobbins from the bobbin case.
Detailed steps for winding thread onto a bobbin, including tension adjustments.
Step-by-step instructions for guiding the thread through the machine's various components.
How to adjust the tension of the needle thread using the serrated nut.
Method for adjusting the bobbin thread tension via the tension screw.
Instructions on adjusting the presser foot pressure using a screw.
How to adjust stitch length using a button and handwheel, referencing a pulley chart.
How to perform tacking and reverse stitching using a lever.
Steps for inserting a new timing belt into the machine's pulley system.
Instructions for removing the timing belt, including loosening screws and parts.
How to adjust the feed dog's maximum height relative to the needle plate.
Setting the feeder position for correct clearance with the needle plate.
How to align the needle with the feeder's hole for proper sewing.
Adjusting needle bar height when at its highest point relative to the needle plate.
Alternative method for adjusting needle bar height at its lowest point relative to the hook.
Verifying the timing between the hook and needle based on specific measurements.
Procedure to adjust the timing for the LSW-27BLK model using drive gears.
How to adjust the hook timing for the LTW-27BK model using set screws.
Adjusting the hook saddle clearance for correct operation.
Setting the correct clearance between the bobbin case opener and its holder.
How to adjust the vertical position of the presser foot.
Adjusting needle feed for synchronization with other feed mechanisms.
Steps for changing the needle gauge, including part removal and timing.
Highlights specific features of these two-needle machines, like bobbin capacity and loop prevention.
Explanation of the mechanism that stops or operates individual needle bars.
Details the components and process for stopping and operating needle bars.
How guides and brackets prevent the needle bar from rotating during operation.
How the needle bar is disengaged from its drive mechanism using a lever.
Explains how shifting the lever controls the needle bar change over frame.
Adjusting the vertical position of needle bars for precise engagement.
How the needle bar engages/disengages from its drive mechanism via a lever.
Explains how shifting the lever controls the needle bar change over frame.
Details on specially designed rotating hooks for angular seams and bobbin capacity.
How the machine prevents lower thread looping, especially on acute angles.
How to adjust the tension of the rear thread controller spring.
Steps for adjusting the tension of the front thread controller spring.
Methods for adjusting the tension of both rear and front take-up springs.
Procedure to set the correct height of needle clamps.
Adjusting needle position to hook points for correct timing.
Adjusting the timing of the lower steel ball for smooth needle bar motion.
Detailed steps for assembling the pedal mechanism for knife control.
How to operate and stop the knife using the treadle pedal.
Steps for removing and replacing the knife, including setting clearance.
Adjusting the knife's lateral position to align with the needle plate groove.
Adjusting the vertical position of the knife change over mechanism.
How to time the knife with the needle for proper cutting action.
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