Delta NM902 Sewing Machine Manual

The Delta NM902 is a versatile household sewing machine featuring multiple stitch patterns, adjustable stitch length and width, built-in needle threader, free arm capability, automatic bobbin winding, reverse sewing function, variable speed control, LED lighting, and drop feed for darning and quilting. Powered by 110-120V AC, 60Hz. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Threading the Machine 7. Basic Sewing Operations 8. Maintenance & Cleaning 9. Accessories 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Sewing head with free arm, built-in stitch patterns, bobbin winding system, LED work light, foot pedal control, accessory compartment.

FeatureDescription
Stitch SelectionMultiple built-in stitch patterns including straight, zigzag, and decorative
Stitch Length ControlAdjustable from 0-4mm
Stitch Width ControlAdjustable from 0-5mm
Built-in Needle ThreaderAutomatic needle threading assistance
Free ArmConvertible for sewing cuffs and sleeves
Reverse SewingButton for reinforcing stitches
Variable Speed ControlFoot pedal with speed adjustment
LED Work LightBright illumination of sewing area
Drop FeedFor darning, quilting, and free-motion sewing
Automatic Bobbin WindingBuilt-in bobbin winding system

Installation

Unpack and inspect contents. Place on stable, level surface.

  1. Remove all packaging materials and protective covers.
  2. Attach foot pedal to machine and plug into power outlet.
  3. Install needle according to markings (flat side toward back).
  4. Wind and install bobbin following threading diagram.
  5. Thread upper thread through guides and needle.

WARNING! Keep fingers away from needle area during operation. Always unplug when not in use.

First-Time Setup

Prepare machine for initial use with proper threading and settings.

  1. Power on machine: Plug into AC outlet, turn power switch on.
  2. Thread machine: Follow numbered guides from spool to needle.
  3. Wind bobbin: Place empty bobbin on winder, thread through tension disc.
  4. Install bobbin: Drop into bobbin case with thread pulling counterclockwise.
  5. Select stitch: Choose appropriate stitch pattern for your project.
  6. Test sew: Use scrap fabric to check tension and stitch quality.

CAUTION! Always use proper needle for fabric type. Replace bent or dull needles immediately.

Specifications

Controls and Settings

Main control panel includes stitch selection dial, stitch length and width controls, reverse button, and power switch.

Stitch Selection: Turn dial to choose from straight, zigzag, stretch, and decorative stitches.

Stitch Length Control: Adjust for shorter or longer stitches (0-4mm).

Stitch Width Control: Adjust zigzag and decorative stitch width (0-5mm).

Reverse Sewing Button: Hold down to sew in reverse for reinforcement.

Power/Light Switch: Turns machine and work light on/off.

Threading the Machine

Proper threading is essential for good stitch quality.

  1. Raise presser foot and needle to highest position.
  2. Place thread spool on spool pin.
  3. Follow numbered threading guides from spool to needle.
  4. Use built-in needle threader for easy needle threading.
  5. Pull thread toward back and under presser foot.
  6. For bobbin: Wind bobbin evenly, insert with thread pulling counterclockwise.

Tip: Always thread with presser foot raised to open tension discs.

Basic Sewing Operations

Fundamental sewing techniques for various projects.

  1. Straight Stitch: Select straight stitch pattern, adjust length as needed.
  2. Zigzag Stitch: Choose zigzag, adjust width for seam finishing or appliqué.
  3. Buttonhole: Use automatic one-step buttonhole function.
  4. Reverse Stitching: Hold reverse button to secure seam ends.
  5. Free Arm Sewing: Remove accessory tray for sewing sleeves and cuffs.
  6. Drop Feed: Lower feed dogs for darning and free-motion quilting.
  7. Changing Presser Feet: Lift lever to release, align new foot and lower lever.

WARNING! Never pull fabric while sewing - let feed dogs move fabric evenly.

Maintenance & Cleaning

Regular maintenance ensures optimal performance and longevity.

  1. Unplug machine before cleaning or maintenance.
  2. Remove needle plate and clean lint from bobbin area regularly.
  3. Oil moving parts as indicated in lubrication diagram (use sewing machine oil only).
  4. Wipe exterior with soft, dry cloth.
  5. Replace needle after 8-10 hours of sewing or if damaged.
  6. Check belt tension periodically.

CAUTION! Use only sewing machine oil. Never use household oils.

Accessories

Standard accessories included with Delta NM902 sewing machine.

Regulatory Information

UL Listed: Complies with UL standard 745. FCC Part 15: Class B digital device. Copyright © 2025 Delta Sewing Machines. All rights reserved. For technical support, visit www.deltasewing.com or contact 1-800-555-1234. Made for household use only.

Troubleshooting

SymptomPossible CauseCorrective Action
Thread breakingIncorrect threading/tensionRe-thread completely; adjust tension; check for burrs on needle.
Skip stitchesWrong needle/damaged needleReplace needle; ensure correct needle for fabric type.
Uneven stitchesPoor quality thread/tensionUse quality thread; clean machine; adjust upper tension.
Machine won't runPower/pedal issuesCheck power connection; ensure pedal plug is secure.
Bobbin thread bunchingIncorrect bobbin threadingRemove and re-thread bobbin; check bobbin case.
Needle breaksWrong needle/bent needleReplace needle; ensure needle is inserted correctly.
Fabric not feedingFeed dogs lowered/dirtyRaise feed dogs; clean feed dog area.

Service: 1-800-555-1234; www.deltasewing.com

Delta NM902 Sewing Machine Manual © - All Rights Reserved 2025