DT C9-5490-9W-D3 Computerized direct drive memory programming top differential feed lockstitch sewing machine (large touch screen)

The DT C9-5490-9W-D3 is a high-performance direct drive computer memory programming top differential feed lockstitch sewing machine equipped with a large touch screen. It is designed for precise hemming, topstitching, and differential feeding on a wide range of fabrics, especially where curve hemming and multi-section differential control are required.

Using the same servo stepper motor to control the amount of fabric in each section, the machine can automatically memorize the number of stitches and differential amount, or allow manual programming to store up to 20 patterns. A single hem arc can be set up to 9 sections, with time- and section-based adjustments. The differential amount can be automatically adjusted or manually switched to meet all hem processing requirements.

This machine is ideal for garment factories producing shirts, trousers, skirts, dresses, and other garments requiring consistent, pucker-free hems and precise differential feeding.

Applications

The DT C9-5490-9W-D3 is widely used in garment manufacturing for processes that demand precise feed control and consistent stitch quality. Typical applications include:

• Curved and arc hemming – shirts, blouses, dresses, skirts, and trousers

• Differential feeding – stretch fabrics, knits, and lightweight materials prone to puckering

• Topstitching and decorative seams – visible stitching requiring even feed and neat appearance

• Multi-variety production – quick style changes without mechanical readjustment

• Large-scale production – one-click operation and memory programming reduce setup time

• Thin to medium-thick fabrics – cotton, silk, synthetics, blends, and light denim

• Garment components – cuffs, collars, plackets, and hem edges

The top differential feed system makes it especially suitable for fabrics that are difficult to feed evenly with a standard lockstitch machine.

Key Features

1. Top Differential Feed + Feed Dog Dual Feed System

Unlike a regular lockstitch machine that only uses feed dogs under the needle plate to push the fabric, the DT C9-5490-9W-D3 adds an independent differential drive at the presser foot. This creates a dual feed system: upper feed + feed dog.

Benefits include:

• Prevents fabric slippage between layers

• Reduces puckering on lightweight and stretch fabrics

• Ensures even feeding on curves and arcs

• Improves stitch consistency on difficult materials

2. Computer Memory Programming – 20 Patterns

The machine can automatically memorize the number of stitches and differential amount for each section. It also allows manual programming to store up to 20 patterns.

• Recall stored patterns instantly

• Reduce setup time for repeat orders

• Ensure consistent results across batches

• Suitable for large-scale, multi-variety production

3. Up to 9 Sections per Hem Arc

A single hem arc can be set up to 9 sections, with time- and section-based adjustments. This allows precise control over different parts of a curved hem, ensuring smooth feeding and consistent stitch density from start to finish.

• Time-based adjustment

• Section-based adjustment

• Automatic or manual differential amount switching

• Meets all hem processing requirements

4. Large Touch Screen Display

The large touch screen displays current stitch length, speed, sewing progress, and other key parameters. It provides:

• Clear visibility of machine status

• One-click operation

• No need to readjust when switching styles

• Easy programming and pattern selection

• Suitable for large-scale, multi-variety production

5. Direct Drive Servo Stepper Motor

The direct drive servo stepper motor system provides:

• Precise control of fabric amount per section

• Low noise and low vibration

• Energy efficiency

• Fast response and accurate needle positioning

• Stable operation at high speeds

6. Oil-Free Sewing Head

The machine features an oil-free sewing head, which means:

• No frequent oiling required

• No oil leakage staining the fabric

• Cleaner operation, especially for light-colored materials

• Reduced maintenance and cleaning time

This is particularly important for garment factories producing white or light-colored fabrics.

Common Questions

1. What is the difference between an"upper differential feed"and a regular lockstitch machine?

A regular lockstitch machine only has feed dogs under the needle plate that push the fabric from below.

The DT C9-5490-9W-D3 adds an independent differential drive at the presser foot, creating a dual feed system: upper feed + feed dog.

This means the fabric is controlled from both above and below, which:

• Prevents layer slippage

• Reduces puckering and stretching

• Provides smoother feeding on curves

• Improves stitch quality on stretch and lightweight fabrics

• Allows precise differential adjustment for different sections

2. What can a large touchscreen do?

The large touchscreen displays current stitch length, speed, sewing progress, and other important information.

It also enables one-click operation: when switching styles, there is no need to readjust mechanical settings. The operator can simply select the stored pattern and start sewing. This makes the machine highly suitable for large-scale, multi-variety production, where quick changeovers and consistent quality are essential.

Additional touchscreen functions include:

• Pattern selection and editing

• Differential amount adjustment

• Section programming for hem arcs

• Real-time monitoring of sewing status

3. Does the machine need to be oiled frequently? Will it leak oil and stain the fabric?

No. The machine features an oil-free sewing head.

This design eliminates the need for frequent oiling of the sewing head area and prevents oil leakage that could stain the fabric. It is especially beneficial for:

• Light-colored and white fabrics

• High-quality garments where cleanliness is critical

• Reducing maintenance time and cleaning costs

4. How does the memory programming work?

The machine uses the same servo stepper motor to control the amount of fabric in each section. It can automatically memorize:

• The number of stitches

• The differential amount for each section

Alternatively, operators can manually program and store up to 20 patterns. A single hem arc can be divided into up to 9 sections, with time- and section-based adjustments. The differential amount can be automatically adjusted or manually switched, allowing the machine to meet virtually all hem processing requirements.

This makes it easy to reproduce complex hemming operations consistently, even with different operators or production batches.

DT C9-5490-9W-D3 Specifications at a Glance

• direct drive lockstitch sewing machine

• top differential feed lockstitch machine

• upper differential feed sewing machine

• computer memory programming sewing machine

• large touch screen sewing machine

• oil-free sewing head lockstitch

• DT C9-5490-9W-D3

• differential feed hemming machine

• industrial lockstitch machine for curve hemming