Global PA 304-P 4 Needle Lockstitch Sewing Machine Manual

The Global PA 304-P is a high-performance 4-needle lockstitch sewing machine designed for heavy-duty industrial applications. Featuring automatic lubrication, needle positioning, thread trimming, and programmable stitch patterns, this machine offers precision stitching for various materials including leather, canvas, and heavy fabrics. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Threading and Needle Setup 7. Operation Guide 8. Maintenance Schedule 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 4-needle lockstitch mechanism, automatic lubrication system, thread trimmer, needle positioning, programmable stitch patterns, and digital control panel.

Feature	Description
Stitching Type	4-needle lockstitch with automatic thread trimmer
Stitch Length	Adjustable from 1-6mm
Speed	Up to 3000 stitches per minute
Needle System	DPx17 needles (4 pieces)
Lubrication	Automatic oil circulation system
Motor	Servo motor with clutch
Presser Foot	Adjustable pressure with quick release
Control Panel	Digital display with programmable settings
Bobbin	Rotating hook with automatic bobbin winding
Safety Features	Emergency stop, overload protection

Installation

Unpack and inspect contents. Place on stable industrial table.

Position machine: Ensure stable, level surface with adequate workspace.
Connect power: Use proper industrial power outlet (220V/380V as specified).
Install motor: Mount servo motor according to diagram, connect drive belt.
Connect air supply: For automatic thread trimmer (if applicable).
Ground machine: Connect grounding wire to prevent electrical hazards.

WARNING! Machine is heavy; use proper lifting equipment. Ensure all connections are secure before operation.

First-Time Setup

Power on machine; initialize control system.

Thread machine: Follow threading diagram for all 4 needles and bobbin.
Set needle positions: Use control panel to program initial needle positions.
Adjust stitch length: Set to recommended starting point (3mm).
Test run: Run machine without material to check operation.
Calibrate sensors: Ensure thread break and needle position sensors work properly.

CAUTION! Keep hands clear of moving parts during setup and testing.

Specifications

Model: Global PA 304-P
Stitch Type: 4-needle lockstitch
Max Speed: 3000 SPM
Stitch Length: 1-6mm adjustable
Needle Size: DPx17 (4 pieces)
Throat Space: 300mm
Lift Height: 12mm
Motor: Servo motor 550W
Power Supply: 220V/380V, 50/60Hz
Machine Weight: 85kg
Dimensions: 800x450x350mm

Controls and Settings

Access settings via digital control panel. Main Controls: POWER, START/STOP, REVERSE, THREAD TRIMMER, NEEDLE POSITION.

Control Panel: Digital display showing stitch count, speed, and error codes. Programmable buttons for stitch patterns, needle positions, and automation settings.

Stitch Settings: Length (1-6mm), width adjustment, pattern selection. Needle Control: Individual needle selection, positioning (up/down). Automation: Automatic thread trimming, back-tack stitching, programmable sequences. Safety: Emergency stop, overload reset, maintenance alerts.

Threading and Needle Setup

Proper threading is essential for optimal performance.

Install needles: Insert DPx17 needles with flat side facing back, tighten securely.
Thread upper threads: Follow numbered guides for all 4 threads simultaneously.
Wind bobbin: Use built-in bobbin winder, ensure even winding.
Insert bobbin: Place in rotating hook, pull thread through tension spring.
Pull up bobbin thread: Hold upper thread, rotate handwheel to bring up bobbin thread.
Adjust tensions: Test on scrap material, adjust upper and lower tensions as needed.

Tip: Always use same thread type and quality for all 4 needles.

Operation Guide

Daily operation procedures for consistent performance.

Power on: Switch on main power, initialize control system.
Select program: Choose pre-programmed stitch pattern or create custom.
Position material: Place under presser foot, lower foot using lever.
Start sewing: Press foot pedal or START button, guide material smoothly.
Automatic functions: Thread trimmer activates at end of seam automatically.
Needle positioning: Needles stop in up position for easy material removal.
Back-tack: Use reverse function for securing seam ends.
Monitor performance: Watch for consistent stitch formation and tension.

WARNING! Never operate with guards removed. Keep fingers away from needle area during operation.

Maintenance Schedule

Regular maintenance ensures long machine life and consistent performance.

Frequency	Maintenance Task
Daily	Clean lint and dust, check oil level, inspect needles
Weekly	Lubricate hook race, check belt tension, clean feed dogs
Monthly	Inspect electrical connections, check motor brushes, calibrate sensors
Quarterly	Replace needles, inspect drive mechanism, check alignment
Annually	Complete overhaul by qualified technician

Care & Cleaning

Disconnect power before cleaning. Use compressed air and lint brushes only.

Daily cleaning: Remove lint from hook area, feed dogs, and tension discs.
Oil maintenance: Check oil level daily, top up with recommended oil only.
Surface cleaning: Wipe exterior with dry cloth; no liquids or solvents.
Needle plate: Remove periodically for thorough cleaning underneath.

CAUTION! Use only recommended lubricants. Never use water or cleaning solvents on electrical components.

Regulatory Information

CE Certified: Complies with European machinery safety standards. ISO 9001:2015 Quality Management System. Copyright © 2024 Global Industrial Sewing Equipment Co. For technical support, visit www.globalsewing.com or contact +1-800-555-1234. All safety guards must remain installed during operation.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Thread breaking	Incorrect tension, burred needle	Check tensions, replace needles, ensure proper threading
Skip stitches	Wrong needle size, bent needle	Replace all needles, check needle alignment
Uneven stitches	Feed dog issues, tension problems	Clean feed dogs, adjust presser foot pressure
Machine jams	Thread buildup, timing issues	Clean hook area, check machine timing
No power	Power connection, fuse	Check power cord, replace fuse if necessary
Oil leaks	Seal damage, overfilling	Check seals, drain excess oil, replace seals if needed

Reset: Power off/on to reset electronic controls. For persistent issues, contact technical support.

Service: +1-800-555-1234; www.globalsewing.com