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To thread a Merrow M-3DW-2, first, raise the presser foot and turn the handwheel to position the needle at its highest point. Then, follow the threading guide on the machine, starting with the upper thread and ensuring it goes through the tension discs, guides, and needle. Next, thread the lower looper and upper looper, making sure to properly route the threads through their respective paths. Finally, pull the threads to ensure they are secure and make a test stitch to verify proper threading.

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3mo ago

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What is cone thread?

Cone thread is thread typically used on an overlock "serger" machine. It is thread wound on a cardboard or plastic cone, and is much bigger than a standard thread spool.


How do you calculate minor diameter?

The minor diameter of a screw thread is calculated by subtracting twice the thread depth from the major diameter. For external threads, the formula is: Minor Diameter = Major Diameter - 2 × Thread Depth. For internal threads, the formula is: Minor Diameter = Major Diameter - 2 × (Thread Height). Thread depth can often be derived from the thread profile or standard tables for specific thread types.


How many yards of thread in a shirt?

0.0025 yards of thread in an adult shirt approx


How can we measure the length of curved line by using thread and divider?

To measure the length of a curved line using a thread and divider, first, place the thread along the curve, ensuring it follows the curvature closely without any slack. Once the thread is laid out along the entire length of the curve, mark the point where it meets the starting point. Then, remove the thread and use a ruler to measure the length of the section of the thread that corresponds to the curve. Alternatively, you can use the divider to mark intervals along the thread and then measure those intervals to get a more accurate length.


What is the proper thread notation for a 40 mm screw with 14mm thread 1.5 mm pitch?

The proper thread notation for a 40 mm screw with a 14 mm thread and a 1.5 mm pitch would be M14x1.5. In this notation, "M" indicates a metric thread, "14" represents the nominal diameter of the screw in millimeters, and "1.5" signifies the pitch of the thread in millimeters. This notation is commonly used in engineering and manufacturing to specify the thread details of screws and bolts.