DT 928PF-D Computerized direct drive feed-off-the arm machine

DT 928PF-D Direct Drive Computerized Feed-off-the-arm Machine – Features & FAQ

The DT 928PF-D is a direct-drive computerized feed-off-the-arm machine (cylinder bed interlock machine) designed for high-efficiency sewing of cuffs, trouser legs, and tubular garments. It features a cantilevered cylinder arm structure that allows closed tubular fabric sections to be slipped directly onto the arm, making it ideal for knitwear and circular sewing applications.

The model designation provides key information:

• PF = Needle Feed

• D = Direct-Drive servo motor

• DT = Series designation

This machine integrates electronic control, energy-efficient direct drive, and stable needle feed technology, making it common equipment for modern knitwear processing lines.

Applications

The DT 928PF-D is widely used in knitwear and garment manufacturing for tubular and circular sewing processes. Typical applications include:

• Knit cuffs – sleeve cuffs, ribbed cuffs, and athletic cuffs

• Trouser legs / hems – bottom hems on knit pants, joggers, and leggings

• Sportswear hems – armholes, necklines, waistbands, and bottom bands

• Children's wear tubular sections – small tubular parts requiring circular sewing

• Underwear and loungewear – elasticated edges and circular hems

• Any process requiring circular sewing on closed tubular materials

Because of its cylinder arm design, the machine can handle closed tubular garments that regular flat-bed interlock machines cannot process efficiently.

Key Features

1. GIC High Hardness Coating on Key Parts

Key parts are treated with a GIC high hardness coating process, which significantly extends the machine's service life. This coating provides:

• Enhanced wear resistance on critical moving components

• Reduced friction and heat buildup

• Longer intervals between part replacements

• Consistent stitch quality over extended production runs

2. Steel Structure Table & Stand with Wheels

The machine is mounted on a steel structure stand and table with wheels, offering multiple benefits:

• Convenient for moving the machine within the factory

• Performing steadily with reduced vibration

• Low noise during operation

• Robust and durable support for long-term use

This mobile design is especially useful for factories that need to reconfigure production lines frequently.

3. Automation Features

The DT 928PF-D is equipped with advanced automation to reduce operator workload and improve efficiency:

• Auto presser foot lifter – automatic lifting of the presser foot for faster material handling

• Auto pneumatic puller lifter – pneumatic lifting of the puller for smooth fabric feeding

• Needle cooler – reduces needle temperature to prevent skipped stitches and thread breakage

• Auto thread trimmer – automatic thread cutting at the end of each sewing cycle

• Inhalation of thread – thread suction system keeps the work area clean and prevents thread tangling

These automation features minimize manual operations and improve overall production speed.

4. Puller Options: Built-in and Crawler-Type

The machine allows selection between built-in pullers and crawler-type pullers, both synchronized to the machine for smooth line movement:

• Built-in pullers: Compact and integrated, suitable for standard operations

• Crawler-type pullers: Provide excellent grip on both thin and thick materials, offering more applicability across different fabric types

The crawler-type puller is particularly effective for difficult fabrics, ensuring even feeding and consistent stitch formation.

5. Automatic Refueling / Lubrication System

The DT 928PF-D features an automatic lubrication system designed for reliable, low-maintenance operation:

1. Spatter lubricating in machine base – keeps internal components lubricated during operation

2. Auto lubricating of the upper shaft – ensures smooth rotation and reduces wear on the main drive

This automatic system reduces the need for manual oiling and helps maintain optimal machine performance.

Common Questions

1. What type of machine is the DT 928PF-D?

The DT 928PF-D is a direct-drive computerized feed-off-the-arm machine (cylinder bed interlock machine). It features a cantilevered cylinder arm structure suitable for sewing cuffs, trouser legs, and tubular garments.

Key designations:

• PF stands for Needle Feed – the needle itself helps feed the fabric, improving stitch consistency and reducing fabric shifting.

• D stands for Direct-Drive servo motor – the motor is directly connected to the machine's upper shaft without a belt drive.

• DT is the series designation.

It integrates electronic control, energy-efficient direct drive, and stable needle feed, making it common equipment for knitwear processing and other circular sewing operations.

2. What are the benefits of Direct Drive technology?

D stands for Direct-Drive servo motor, meaning the motor connects directly to the machine's upper shaft—no belt drive is used.

Benefits of direct drive technology include:

• Energy saving: 30–50% less power consumption than traditional clutch motors

• Quiet operation: No belt friction noise, resulting in a quieter working environment

• Fast response: Precise start/stop control and more accurate needle positioning

• Less maintenance: No belt wear issues, eliminating regular belt replacement

• Lower temperature rise: Better stability during long continuous runs

• High starting torque: No hesitation when starting on thick materials

Direct drive technology significantly improves both productivity and operator comfort.

3. What are the advantages of the cylinder arm structure?

This machine features a long, slender cylinder arm design (approximately 70–100mm in diameter), allowing tubular garments to be slipped directly onto the arm for sewing.

Closed tubular materials that regular flat-bed interlock machines cannot handle are easily managed on the DT 928PF-D, including:

• Knit cuffs

• Trouser legs and hems

• Sportswear hems

• Children's wear tubular sections

• Any process requiring circular sewing

The cylinder arm structure enables continuous circular stitching without the need for repositioning or seam opening, resulting in higher productivity and cleaner finished edges.

DT 928PF-D Specifications at a Glance

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