SINGER HD6700 Common Problems and Troubleshooting

The SINGER Heavy Duty 6700C sewing machine is designed to handle heavy-duty sewing projects while offering a wide range of creative possibilities. In this article, we will explore common problems that users might encounter with the SINGER HD6700 model and provide troubleshooting solutions to help you resolve them.

SINGER HD6700 Overview

The SINGER® Heavy Duty 6700C gives you the best of both worlds in heavy duty sewing and endless creative possibilities! With a heavy duty metal frame, powerful motor, and loads of easy-to-use features, the SINGER® Heavy Duty 6700C is a true workhorse.

From denim to canvas, the Heavy Duty 6700C is designed with your heavy duty projects in mind. Thanks to the machine’s powerful motor, you’ll have the needle piercing power and extra high sewing speed to take on your heavy duty sewing projects with ease.

In addition to strength, speed, and enhanced power, enjoy incredible creative capabilities…

Product Specification

BrandColorMaterialProduct DimensionsItem WeightPower SourceIs Electric
SINGERGrayMetal13.5″D x 20″W x 9.5″H16.62 PoundsAcYes

Product Details and Features

  • HEAVY DUTY SEWING WITH ENDLESS CREATIVITY MADE EASY: The SINGER Heavy Duty 6700C gives you the best of both worlds…
  • ENHANCED POWER: Thanks to the machine’s powerful motor, you’ll have the needle piercing power and extra high sewing speed…
  • PROFESSIONAL SPEED: A true workhorse sewing up to 1,100 Stitches per minute.

Causes of Common Problems with the SINGER HD6700

This section will address possible problems and solutions related to the SINGER HD6700 sewing machine. We will provide insights into troubleshooting common issues that users might encounter with this sewing machine model.

Common Problems with the SINGER HD6700 and Troubleshooting

  • Bobbin Thread Tangling Under Fabric

    Problem: While sewing, the bobbin thread gets tangled under the fabric, leading to uneven stitches and frustration.

    Cause: Incorrect threading of the bobbin or upper thread tension may be too loose.


    • Re-thread both the bobbin and upper threads following the machine’s threading guide.
    • Check and adjust the upper thread tension to ensure it’s properly balanced.
    • Make sure the bobbin is wound evenly and inserted correctly.
  • Needle Breakage During Sewing

    Problem: Needles frequently break while sewing, causing frustration and interruption of your projects.

    Cause: Use of incorrect needle size or type, or hitting pins or hard objects while sewing.


    • Ensure you’re using the correct needle size and type for the fabric you’re sewing.
    • Avoid sewing over pins or hard objects that could damage the needle.
    • Regularly replace the needle to prevent dullness.
  • Uneven Stitching and Skipped Stitches

    Problem: Stitches appear uneven or skipped, resulting in an unsightly finish.

    Cause: Incorrect threading, improper bobbin insertion, or dull needle.


    • Check and re-thread both the upper and bobbin threads according to the machine’s threading guide.
    • Ensure the bobbin is inserted correctly and the thread is properly wound.
    • Replace the needle if it’s dull or bent.
  • Thread Tension Issues

    Problem: Inconsistent thread tension leads to loops on the top or bottom of the fabric.

    Cause: Incorrect threading, improper tension settings, or lint buildup in the tension discs.


    • Check the machine’s threading guide and re-thread the machine.
    • Adjust the tension settings based on the fabric and thread you’re using.
    • Clean the tension discs from any lint or debris that might affect tension.
  • Noise and Vibration During Operation

    Problem: The machine produces excessive noise and vibration while sewing.

    Cause: Loose parts, improper machine setup, or lack of proper lubrication.


    • Check all parts and screws to ensure they’re properly tightened.
    • Make sure the machine is placed on a stable surface and properly balanced.
    • If applicable, follow the machine’s maintenance guidelines for proper lubrication.
  • Thread Bunching Under the Fabric

    Problem: Thread bunches up and forms loops under the fabric, causing messy stitches.

    Cause: Incorrect threading, improperly wound bobbin, or damaged needle.


    • Re-thread the machine following the threading guide.
    • Ensure the bobbin is wound correctly and inserted properly.
    • Replace the needle if it’s damaged or bent.
  • Machine Jams or Stops Mid-Sewing

    Problem: The sewing machine frequently jams or stops abruptly during sewing.

    Cause: Accumulated lint in the bobbin area, incorrect threading, or tension issues.


    • Regularly clean the bobbin area from lint and debris.
    • Double-check the machine’s threading and ensure it’s correct.
    • Adjust the thread tension to prevent excessive strain on the machine.
  • Uneven Feed and Fabric Movement

    Problem: The fabric doesn’t move smoothly or evenly, causing uneven stitches.

    Cause: Incorrect presser foot pressure, feed dogs not engaging, or uneven fabric layers.


    • Adjust the presser foot pressure according to the fabric thickness.
    • Check if the feed dogs are raised and properly engaged.
    • Ensure that the fabric layers are aligned and even to prevent uneven movement.
  • Needle Threader Malfunction

    Problem: The automatic needle threader fails to work properly, causing frustration.

    Cause: Misaligned needle, improper use of the threader, or dirt obstructing the mechanism.


    • Make sure the needle is properly aligned and centered.
    • Follow the machine’s instructions to use the needle threader correctly.
    • Clean the threader mechanism from any dirt or debris that might be hindering its operation.
  • Stitch Length and Width Inconsistency

    Problem: Stitches have inconsistent length or width, affecting the overall sewing quality.

    Cause: Incorrect stitch settings, malfunctioning selector, or mechanical issues.


    • Double-check and adjust the stitch settings to the desired length and width.
    • Ensure that the stitch selector is functioning correctly and set to the desired stitch type.
    • If the problem persists, consult the machine’s manual for possible mechanical issues.
  • Thread Keeps Breaking

    Problem: The thread consistently breaks while sewing, causing frustration and interruptions.

    Cause: Incorrect thread tension, rough needle eye, or thread caught in the machine.


    • Adjust the thread tension to ensure it’s balanced for the fabric and thread type.
    • Check the needle eye for any rough edges that might be damaging the thread.
    • Inspect the machine for any areas where the thread might be getting caught and resolve the issue.
  • Machine Skips Stitches

    Problem: The machine skips stitches during sewing, resulting in incomplete seams.

    Cause: Dull or damaged needle, incorrect needle size, or improper threading.


    • Replace the needle with a new one to ensure it’s sharp and undamaged.
    • Use the correct needle size and type for the fabric you’re sewing.
    • Check and re-thread the machine according to the threading guide.
  • Bobbin Winding Problems

    Problem: Bobbin winding is uneven, loose, or doesn’t wind properly.

    Cause: Incorrect threading of the bobbin winding mechanism or debris in the bobbin area.


    • Follow the machine’s instructions to thread the bobbin winding mechanism correctly.
    • Clean the bobbin area from lint, thread, or debris that might hinder proper winding.
    • Ensure the bobbin is placed securely and properly on the winding spindle.
  • Inconsistent Thread Tension While Quilting

    Problem: Thread tension varies when quilting, causing uneven stitches in quilted projects.

    Cause: Uneven fabric layers, improper presser foot choice, or insufficient tension adjustments.


    • Ensure the fabric layers in your quilting project are evenly aligned and secured.
    • Choose a quilting presser foot suitable for the fabric and technique you’re using.
    • Experiment with tension settings and test on scrap fabric to achieve balanced quilting stitches.
  • Unresponsive Touch Buttons

    Problem: The touch buttons on the machine’s control panel become unresponsive.

    Cause: Dirt or moisture affecting the touch panel, or a technical glitch.


    • Gently clean the touch panel with a soft, dry cloth to remove any dirt or moisture.
    • If the problem persists, try restarting the machine and see if the buttons become responsive.
    • If the issue continues, consult the machine’s manual for further troubleshooting or contact customer support.
  • Thread Fraying or Breaking

    Problem: The thread consistently frays or breaks during sewing, leading to messy stitches.

    Cause: Incorrect needle size for the thread, burrs on the needle, or tension issues.


    • Use the appropriate needle size that matches the thread thickness.
    • Inspect the needle for any burrs or damage, and replace it if necessary.
    • Adjust the thread tension to prevent excessive strain on the thread.
  • Automatic Thread Cutter Malfunction

    Problem: The automatic thread cutter feature doesn’t work as expected, leaving thread tails.

    Cause: Thread caught in the cutter mechanism, misalignment, or technical glitch.


    • Ensure there are no thread tangles or obstructions near the thread cutter.
    • Check for any misalignment in the cutter mechanism and adjust if needed.
    • If the problem persists, try restarting the machine and testing the feature again.
  • Uneven Feed Dog Movement

    Problem: The feed dogs move unevenly, causing fabric to gather or not advance properly.

    Cause: Dirt or debris obstructing the feed dog mechanism or improper lubrication.


    • Clean the feed dog area from any lint, thread, or debris that might hinder movement.
    • If applicable, follow the machine’s maintenance guidelines to lubricate the feed dog mechanism.
    • Ensure the feed dogs are properly engaged and move smoothly.
  • Thread Keeps Slipping Out of the Needle

    Problem: The thread frequently slips out of the needle eye, causing sewing interruptions.

    Cause: Insufficient threading, worn-out needle, or incorrect needle insertion.


    • Double-check and ensure the thread is correctly threaded through the needle eye.
    • Replace the needle with a new one if it’s worn or damaged.
    • Make sure the needle is inserted correctly with the flat side facing the back of the machine.
  • Thread Jams in the Bobbin Area

    Problem: Thread frequently jams or gets tangled in the bobbin area, disrupting sewing.

    Cause: Improperly wound bobbin, incorrect threading, or damaged bobbin case.


    • Ensure the bobbin is wound evenly and inserted correctly into the bobbin case.
    • Check and re-thread the machine, following the threading guide carefully.
    • Inspect the bobbin case for any damage or rough edges that might be causing thread jams.
  • Stitch Quality Variation

    Problem: The quality of stitches varies, with some appearing loose or too tight.

    Cause: Incorrect thread tension, needle size, or bobbin threading.


    • Adjust the thread tension to achieve balanced stitches for your fabric.
    • Use the appropriate needle size and type for the fabric you’re sewing.
    • Ensure the bobbin is properly threaded and inserted in the bobbin case.
  • Machine Freezing or Locking Up

    Problem: The sewing machine freezes or locks up during operation, hindering sewing progress.

    Cause: Technical glitch, thread entanglement, or motor overload.


    • If the machine freezes, turn it off, wait a moment, and then turn it back on.
    • Inspect the machine for any tangled thread that might be causing jamming.
    • Avoid sewing through excessively thick layers that could overload the motor.
  • Needle Hits the Presser Foot

    Problem: The needle hits the presser foot while sewing, causing damage to both.

    Cause: Incorrect needle positioning, bent needle, or improper presser foot installation.


    • Ensure the needle is properly inserted with the flat side facing the back.
    • Replace the needle if it’s bent or damaged.
    • Double-check that the presser foot is securely attached and aligned.
  • Uneven Fabric Gathering

    Problem: The fabric gathers unevenly while sewing, affecting the final seam appearance.

    Cause: Uneven fabric feeding, incorrect presser foot pressure, or tension issues.


    • Ensure the fabric is guided evenly and doesn’t bunch up while sewing.
    • Adjust the presser foot pressure to match the fabric thickness.
    • Check and adjust thread tension to prevent fabric distortion.
  • Uneven Stitch Length on Seams

    Problem: The stitch length varies along seams, leading to an irregular appearance.

    Cause: Inconsistent feed rate, fabric slipping, or uneven pressure on the presser foot.


    • Practice consistent feeding speed to achieve even stitches.
    • Use a walking foot or engage the machine’s fabric feeding mechanism if available.
    • Ensure the fabric is properly aligned and supported to prevent slipping.

SINGER HD6700 Sewing Machine User Reviews

In this section, we’ll take a look at user reviews for the SINGER HD6700 sewing machine. These reviews provide valuable insights into the experiences of individuals who have used this sewing machine model. The information is sourced from reviews available on Walmart website.

Positive Reviews from SINGER HD6700 Users

Many users were satisfied with the following aspects associated with their SINGER HD6700 sewing machine:

  • Powerful and efficient sewing for heavy-duty projects.
  • Easy-to-understand user manual for beginners.
  • Consistent stitch quality, even on various fabric types.
  • Impressive range of pre-programmed stitches for creative projects.
  • Smooth and reliable operation, even at high sewing speeds.
  • Ability to handle thick fabrics like denim and leather without issues.

These positive experiences highlight the machine’s versatility, ease of use, and ability to tackle a variety of sewing tasks.

Negative User Reviews of the SINGER HD6700

While the majority of users had positive experiences, some users encountered the following issues with the SINGER HD6700 sewing machine:

  • Difficulty in getting proper tension settings for certain stitches.
  • Machine freezing or locking up during operation.
  • Experiencing issues with the bobbin mechanism.
  • Problems with the zig-zag function not working consistently.
  • Issues with the machine breaking down after a short period of use.
  • Unsatisfactory customer service experiences when seeking technical support.

These negative experiences emphasize the importance of thorough research and testing before making a purchase decision.

Overall, the majority of users were satisfied with the SINGER HD6700 sewing machine. Reviews reflected a 5.0 out of 5 stars rating on Walmart’s website, indicating a high level of customer satisfaction. Positive feedback highlighted the machine’s power, versatility, and ease of use, making it suitable for both beginners and experienced sewers.

It’s important to consider both positive and negative feedback when making a purchasing decision, as individual experiences can vary based on personal preferences and usage scenarios.

SINGER HD6700 Sewing Machine Manual

The operating instructions for the SINGER HD6700 sewing machine can be found on the manufacturer’s website. Please visit the official website to access the manual and detailed instructions for using your machine.

Frequently Asked Questions about the SINGER HD6700

Q: How can I adjust the thread tension on my SINGER HD6700?

A: To adjust the thread tension, refer to your machine’s manual for specific instructions. Generally, you can use the tension dial to increase or decrease the tension based on the fabric you’re sewing. Experiment with test stitches to achieve the desired tension for your project.

Q: Why does my SINGER HD6700 keep jamming?

A: Jamming can be caused by various factors, such as incorrect threading, using the wrong needle or thread, or a buildup of lint in the bobbin area. Clear any tangled threads and ensure proper threading and bobbin placement. Use the correct needle and thread for your fabric.


For any issues or problems with your SINGER HD6700 sewing machine, it’s recommended to refer to the machine’s manual for guidance. If the issue persists or you’re unsure about troubleshooting steps, you can reach out to the manufacturer’s customer service or a certified service center for professional assistance. Proper maintenance and following the manual’s instructions will help ensure optimal performance of your machine.

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