Singer HD 6700C User Manual (English)

Amanda McmahonSep 9, 2025

How to troubleshoot bobbin winding difficulties on a Singer HD 6700C Sewing Machine?

D
dnicholsSep 9, 2025
If you're experiencing bobbin winding difficulties with your Singer Sewing Machine, it could be due to the bobbin thread being loosely wound on the bobbin. Rewind the bobbin, ensuring the thread is placed snugly in the bobbin winding tension disc. Another cause could be that the bobbin winding spindle isn't fully engaged, so check that it has been fully engaged before starting to wind. Also, if the bobbin is winding sloppily, hold the thread tail securely at the beginning of the winding process, allow the bobbin to partially fill, then stop to trim the thread tail close to the bobbin.

Brand	Singer
Model	HD 6700C
Category	Sewing Machine
Language	English

Brand

Singer

Model

HD 6700C

INTRODUCTION

Intended Use

Specifies the proper use of the sewing machine and its limitations.

Machine Overview

Identifies and explains the main components and parts of the sewing machine.

Needle Area Overview

Details the components and functions located around the sewing needle.

Top of Machine

Describes the parts and features located on the upper section of the sewing machine.

Overview Accessories

Lists and briefly describes the various accessories included with the sewing machine.

Included Accessories (Not Pictured)

Lists accessories that are part of the package but not visually shown.

Presser Feet

Explains the different types of presser feet and their specific sewing applications.

Optional Accessories

Informs about additional accessories available for purchase to enhance machine functionality.

PREPARATIONS

Unpacking the Machine

Instructions for safely removing the sewing machine from its packaging.

Connect to the Power Supply

Guide on how to properly connect the machine to an electrical power source.

Packing Machine after Sewing

Procedures for safely storing the sewing machine after use.

Free Arm/Removable Accessory Tray

Explains the use and removal of the accessory tray and free arm feature.

Presser Foot Lifter

Details the function and operation of the presser foot lifter mechanism.

Thread Knife

Instructions on how to use the built-in thread knife for cutting threads.

Spool Pin

Information on using the horizontal and vertical spool pins for different thread types.

Wind the Bobbin

Step-by-step guide on how to wind thread onto a bobbin.

Insert the Bobbin

Instructions for correctly inserting the wound bobbin into the bobbin case.

Thread the Machine

Detailed procedure for threading the upper thread through the sewing machine.

Needle Threader

Guide on using the built-in needle threader for quick threading.

Needles

Information about different types of needles and their suitability for various fabrics.

Important Needle Information

Key considerations and tips regarding needle selection and maintenance for optimal sewing.

Selection Guide — Needle Size, Fabric, Thread

A chart matching needle sizes and types to specific fabrics and threads.

Change the Needle

Step-by-step instructions on how to safely replace the sewing machine needle.

Thread Tension

Explains how to adjust thread tension for optimal stitch quality.

Sew without Feed Teeth

Instructions on disengaging the feed teeth for specific sewing tasks like button sewing.

Presser Foot Pressure

Details on adjusting presser foot pressure for different fabric types.

Change the Presser Foot

Step-by-step guide on how to attach and detach presser feet.

OPERATING YOUR MACHINE

Machine Operation Controls

Explains the purpose and function of the primary control buttons on the machine.

Stitch Control Panel

Details on using the panel for selecting, adjusting stitches, and managing settings.

Sequence Controls

Information on using sequence mode for creating and managing stitch patterns.

Sewing Mode

Overview of the main sewing screen and how to adjust stitch settings.

Select a Stitch

Guide on navigating stitch menus and selecting desired stitches.

Sequence Mode

Explains how to enter and navigate the sequence mode for programming stitches.

Create a Sequence

Instructions on programming custom stitch sequences using letters and numbers.

SEWING

Start to Sew – Straight Stitch

Basic guide for initiating sewing with a straight stitch.

Change Needle Position

How to adjust needle position for tasks like topstitching or zipper insertion.

Change Sewing Direction

Procedure for changing the sewing direction of the fabric.

Finish Sewing

Methods for securing seams at the end of a sewing project.

Straight Stretch Stitch

Using a triple elastic stitch for stretch fabrics and high-strain seams.

Multi-Step Zigzag Stitch

Application of the multi-step zigzag for overcasting edges and elastic seams.

Slant Overedge Stitch

Using the slant overedge stitch for seams and overcasting stretch fabrics.

Closed Overlock Stitch

Techniques for using the closed overlock stitch on medium to heavy stretch fabrics.

Blind Hems

How to create invisible hems on various fabrics using blind hem stitches.

Darning and Mending

Techniques for repairing holes and tears using darning and zigzag stitches.

Repair Small Holes

Specific method for darning small holes or tears with automatic stitches.

Jeans Hem

Techniques for sewing durable hems on thick fabrics like jeans.

Button Sewing

Guide on using the special stitch and foot for attaching buttons.

One-Step Buttonhole

Instructions for creating perfectly sized buttonholes automatically.

Sew Zippers

Methods for sewing zippers using the specialized zipper foot.

Sew Easy Foot

Utilizing the Sew Easy Foot for precise straight stitching and topstitching.

Hand-Look Quilt Stitch

Simulating handmade quilting stitches for decorative effects.

MAINTENANCE

Cleaning the Machine

General instructions for cleaning the exterior and internal parts of the machine, including bobbin area.

TROUBLESHOOTING

Thread Loops on Underside of Fabric

Addresses issues with upper thread looping on the fabric underside.

Bobbin Thread Breaking

Troubleshooting steps for frequent bobbin thread breakage.

Bobbin Thread Showing on Top of Fabric

Solutions for when the bobbin thread appears on the top side of the fabric.

Bobbin Winding Difficulties

Troubleshooting steps for problems encountered during bobbin winding.

Fabric Puckers

Solutions for fabric puckering issues that may occur during sewing.

Fabric Is Tunneling Under Stitches

Guidance on preventing fabric tunneling, especially with dense stitches.

Loud Noise When Sewing

Diagnosing and resolving causes of excessive noise during machine operation.

Machine is Not Feeding Fabric

Troubleshooting steps when the fabric is not feeding correctly.

Machine Will Not Run

Solutions for when the sewing machine fails to start or operate.

Needles Breaking

Reasons for needle breakage and how to prevent it.

Needle Threader Not Working

Troubleshooting steps for a malfunctioning built-in needle threader.

Skipping Stitches

Solutions for issues causing skipped stitches during sewing.

Stitches Distorted

Addressing problems leading to distorted or uneven stitches.

Thread Bunching at Beginning

Solutions for thread bunching issues occurring at the start of sewing.

Upper Thread Breaking

Troubleshooting steps for frequent upper thread breakage.

Singer HD 6700C User Manual

Table of Contents

Questions and Answers:

Singer HD 6700C Specifications

Summary

IMPORTANT SAFETY INSTRUCTIONS