Janome DMX300 Deluxe Sewing Machine Manual

The Janome DMX300 Deluxe is a computerized sewing machine with 300 built-in stitches, automatic needle threader, built-in needle plate, 9mm stitch width, top-loading bobbin system, adjustable presser foot pressure, speed control slider, start/stop button, reverse stitch button, automatic thread cutter, and LCD screen. Powered by standard household electrical outlet. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation & Setup 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Stitch Selection 7. Advanced Functions 8. Maintenance & Cleaning 9. Accessories Included 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Computerized control panel, LCD display, automatic needle threader, top-loading bobbin system, built-in needle plate, accessory storage compartment.

Feature	Description
Built-in stitches	300 stitch patterns including utility, decorative, and quilting stitches
Automatic needle threader	Easy threading with push-button operation
Top-loading bobbin	Jam-resistant bobbin system with clear cover
LCD screen	Displays stitch selection, stitch length, and width settings
Start/stop button	Sew without foot control
Automatic thread cutter	One-touch thread cutting
Speed control slider	Adjustable sewing speed
Needle up/down	Programmable needle position
Memory function	Store favorite stitch combinations
Presser foot pressure	Adjustable for different fabric types

Installation & Setup

Unpack and inspect contents. Place on stable sewing table.

Remove packaging materials and protective covers from machine.
Connect foot control pedal to machine and plug into power outlet.
Install needle: Loosen needle clamp screw, insert needle with flat side to back, tighten screw.
Wind bobbin: Place thread on spool pin, follow threading guide, wind bobbin.
Insert bobbin: Place bobbin in bobbin case with thread rotating counterclockwise.

WARNING! Keep fingers away from needle area during operation. Always turn off power when threading or changing needles.

First-Time Operation

Power on machine; follow basic threading procedure.

Thread upper thread: Follow numbered threading path on machine.
Use automatic needle threader: Push lever down and hook thread through needle.
Pull up bobbin thread: Hold upper thread, turn handwheel toward you.
Select basic straight stitch for initial testing.
Test sew on scrap fabric to ensure proper tension.

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

Specifications

Stitches: 300 built-in stitches
Stitch Width: Up to 9mm
Stitch Length: Up to 5mm
Bobbin: Top-loading, jam-resistant
Needle System: HAx1 SP
Presser Feet: 9 included, snap-on style
Display: LCD screen with stitch information
Power Source: Standard household electrical outlet
Warranty: 25-year limited warranty

Controls and Settings

Access functions via control panel buttons and LCD display.

Main Controls: Power switch, stitch selection buttons, length/width adjustment, reverse stitch, needle up/down, start/stop, thread cutter.

Stitch Settings: Length (0-5mm), Width (0-9mm), mirror image, memory save/recall. Utility Settings: Auto-lock stitch, automatic reinforcement, speed control, presser foot pressure adjustment. Display: Shows selected stitch, settings, and error messages.

Stitch Selection

Choose from 300 built-in stitches using category buttons.

Press stitch category button (utility, decorative, quilting, etc.)
Use arrow keys to browse stitch patterns
Select stitch with OK/enter button
Adjust length and width as needed
Use mirror function for symmetrical designs
Save favorite combinations to memory

Tip: Test new stitches on scrap fabric before sewing project.

Advanced Functions

Memory Function: Save up to 30 stitch combinations for quick access. Automatic Thread Cutter: Cuts both top and bobbin threads with single button. Needle Position: Program needle to stop in up or down position. Speed Control: Adjust maximum sewing speed with slider. Automatic Reinforcement: Program automatic backtacking at stitch beginning/end.

Maintenance & Cleaning

Regular maintenance ensures optimal performance.

Clean bobbin area regularly with brush provided
Oil machine as directed in maintenance section
Replace needle after 8-10 hours of sewing
Clean feed dogs with soft brush
Cover machine when not in use

CAUTION! Always unplug machine before cleaning or maintenance.

Accessories Included

Standard accessories provided with DMX300 Deluxe:

9 Snap-on presser feet
Assorted needles
Bobbin (class 15 style)
Seam ripper/lint brush
Screwdriver
Spool holders
Instruction manual
Power cord and foot control
Hard cover

Regulatory Information

UL listed for household use. Complies with FCC regulations for digital devices. Copyright © 2025 Janome America, Inc. For technical support, contact Janome customer service at 1-800-631-0183 or visit www.janome.com. Serial number located on machine base.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Machine not running	Power connection	Check power cord connection; ensure foot control is plugged in.
Thread breaking	Tension/thread quality	Check threading path; adjust tension; use quality thread.
Skipped stitches	Needle/blunt needle	Replace needle; ensure correct needle type for fabric.
Bobbin thread bunching	Bobbin threading	Re-thread bobbin ensuring correct direction; check bobbin case.
Uneven stitches	Tension settings	Adjust upper and lower tension; clean tension discs.
Error messages on display	Machine error	Consult error code in manual; turn machine off/on.

Reset: Turn machine off and on to reset computer functions.

Service: 1-800-631-0183; www.janome.com