The Singer Heavy Duty 6700C is a high-performance sewing machine designed for demanding projects. It features a powerful motor, 70 built-in stitches, an automatic needle threader, a top drop-in bobbin, a one-step buttonhole, adjustable presser foot pressure, and a heavy-duty metal frame. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.
Key components: Heavy-duty metal frame, LED work light, automatic needle threader, top drop-in bobbin system, built-in stitch patterns, and accessory storage.
| Feature | Description |
|---|---|
| Built-in Stitches | 70 stitches including basic, decorative, stretch, and buttonholes |
| Automatic Needle Threader | Easily threads the needle with a lever |
| Top Drop-in Bobbin | Clear view bobbin system for easy monitoring |
| One-Step Buttonhole | Automatically creates a buttonhole of precise size |
| Powerful Motor | Heavy-duty motor for sewing through multiple layers |
| Adjustable Presser Foot Pressure | For handling different fabric thicknesses |
| Stitch Length/Width Dial | Adjustable for custom stitch settings |
| Reverse Stitch Lever | For reinforcing seams |
| Free Arm | For sewing cuffs and tubular items |
| Accessory Storage | Built-in compartment for feet, needles, and tools |
Unpack and inspect contents. Place on a stable, flat surface.
WARNING! Keep fingers away from the needle area during operation. Always turn the handwheel towards you.
Power on the machine; the LED light will illuminate.
CAUTION! Always unplug the machine before changing needles, cleaning, or performing any maintenance.
Access functions via dials and levers on the front and side of the machine.
Main Controls: Power Switch/ Light, Stitch Selection Dial, Stitch Length Dial (0-4 mm), Stitch Width Dial (0-6 mm), Reverse Stitch Lever, Bobbin Winder Spindle/Stop.
Basic Settings:
Thread Tension: Adjust dial for balanced stitches (usually 4-5 for medium weight fabrics).
Presser Foot Pressure: Adjust lever for thick or thin fabrics.
Needle Position: Use handwheel to raise/lower needle. The machine stops with needle up by default.
Supports a wide variety of sewing techniques for garments, crafts, and home décor.
Tip: Always match the needle type and thread to your fabric for best results.
Regular maintenance ensures optimal performance and longevity.
WARNING! Never use compressed air to clean the machine as it can force lint deeper into the mechanism.
FCC Compliance: This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that it does not cause harmful interference. Copyright © Singer Manufacturing Company. All trademarks are the property of their respective owners. For support, visit www.singer.com or contact Singer Customer Service at 1-800-4-SINGER.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Machine does not run | Not plugged in / Power switch off | Check power cord connection and ensure power switch is ON. |
| Thread bunching underneath (bird nesting) | Incorrect threading / Bobbin inserted wrong | Re-thread the upper thread and bobbin, ensuring correct direction and path. |
| Skipped stitches | Dull/bent needle / Wrong needle for fabric | Replace needle with a new, correct type (e.g., ballpoint for knits). |
| Needle breaks | Wrong needle size / Pulling fabric / Bent needle | Use correct needle size, do not pull fabric, let feed dogs move it. Insert needle properly. |
| Uneven or loose stitches | Incorrect tension | Re-thread completely. Adjust tension dial gradually. Check for lint in tension discs. |
| Fabric not feeding | Presser foot pressure too low / Feed dogs lowered | Increase presser foot pressure. Check that feed dogs are in the raised position. |
| Unusual noise | Lint or thread jam / Lack of oil | Unplug, clean bobbin area thoroughly. Oil machine if needed. |
Reset: Unplug machine for 60 seconds to reset electronic components if experiencing erratic behavior.
Service: For persistent issues, contact authorized Singer service center. 1-800-4-SINGER; www.singer.com