NC Servo Feeder RNC-B RNC-H (0.4-4.5MM 0.6-6.0MM)

The SUNRUI RNC-B and RNC-H series are heavy-duty NC servo feeders designed for precision coil feeding in demanding stamping applications. The RNC-B series handles material thicknesses from 0.4mm to 4.5mm, while the RNC-H series processes thicker coils from 0.6mm to 6.0mm, both supporting coil widths up to 600mm with a maximum feeding speed of 20 m/min.

Precision You Can Measure

Powered by a Yaskawa servo motor and controlled by a Mitsubishi PLC, the RNC series delivers repeatable feeding accuracy of ±0.15mm with programmable feed lengths up to 9999.99mm. The high-resolution encoder provides closed-loop feedback for precise position control, ensuring consistent part quality and minimizing scrap.

Pneumatic Release System for Reliable Synchronization

The pneumatic release system uses a cylinder controlled by a solenoid valve to clamp and release the material. It is synchronized with your press cam signals for precise feeding cycles—when the press slide reaches the 9 o'clock position, the feeding signal is triggered; at the 6 o'clock position, the release signal is sent, allowing the pilot pins to accurately position the material before stamping.

Programmable & Flexible Operation

The user-friendly HMI touchscreen allows operators to input up to 20 different feed lengths, enabling quick changeovers and flexible production runs. Unlike conventional roller feeders, the RNC series supports multiple step-feeding programs, making it ideal for complex progressive die stamping.

Robust Construction for Heavy-Duty Applications

All feed rollers are manufactured from high-grade steel, hard-chrome plated, and precision-ground for extended service life. The RNC-H series features larger feed rollers (Upper Ø90mm / Bottom Ø90mm) for increased gripping power on heavy-gauge coils.

Wide Range of Applications

The RNC series is widely used in automotive structural parts, appliance components, heavy hardware stamping, saw blade stamping, and electronic component stamping lines. It can be seamlessly integrated with stamping presses, hydraulic presses, shearing machines, and laser cutting machines via standard synchronization interfaces.

SUNRUI RNC series NC servo feeders are widely used in industries requiring high-volume, precision metal coil feeding and stamping . The following table provides a concise overview of key application areas:

The RNC series servo feeder is the second step in a standard, fully automated metal sheet stamping line :

• Decoiler Straightener – Loads the coil, uncoils the strip, and straightens the material to remove coil set and curvature.

• NC Servo Feeder (RNC Series) – Precisely feeds the straightened strip into the press at a programmed length and speed.

• Stamping Press – With the appropriate dies, performs the stamping operation to produce the end product.

Integration Versatility

Beyond standard stamping lines, RNC series feeders can be integrated with a wide range of processing equipment:

• Stamping presses (mechanical and hydraulic)

• Shearing machines

• Laser cutting machines

• Forming machines 

  
  

Why RNC Series for Your Application?

The RNC series is particularly well-suited for complex stamping processes because it can perform multiple step-feeding programs (up to 20 preset lengths) in the same stamping process on one punch press . This programmability, combined with ±0.1mm feeding accuracy and robust construction for materials up to 6.0mm thick, makes it an essential solution for modern, high-precision stamping operations

● Reliable Heavy Duty Mechanical Design

The RNC series features a stabilized steel frame construction with high-concentricity mechanical structure, specifically engineered for heavy-duty coil feeding applications. All feed rollers undergo heat treatment, hard chrome plating, and precision grinding to achieve HRC60-62° surface hardness. The gear-driven upper roll incorporates anti-backlash features to ensure non-slip, positive feeding. Shot blasting surface treatment enhances paint adhesion and extends machine lifetime, maintaining a professional appearance even under continuous operation.

● Extended service life & lower maintenance cost

 All main components are sourced from world-renowned brands with CE certification, ensuring superior quality and operational safety. This includes full sets of Japanese low-voltage electrical components, Japan Mitsubishi PLC, and Japan Yaskawa servo motor. This proven combination reduces maintenance frequency, minimizes unplanned downtime, and extends the overall service life of the equipment—even under heavy-duty, continuous production conditions.

● Advance and Smart control systems

The RNC series is equipped with a computerized numerical control system powered by Mitsubishi PLC (Japan), with optional Siemens (Germany) configurations. The intuitive HMI touchscreen display allows operators to directly input up to 20 different feed lengths, with programmable feed lengths up to 9999.99mm. This smart control system simplifies setup, reduces changeover time, and enables flexible production runs with minimal operator intervention.

● Accuracy and reliable feeding performance

High-resolution Yaskawa servo motors combined with low-inertia servo drives deliver reliable ±0.15mm feeding accuracy. The Mitsubishi PLC program ensures consistent indexing accuracy across high-speed stamping operations, minimizing scrap from misfeeds, reducing die wear, and improving first-pass yield. Whether running short batches or long production runs, the RNC series maintains repeatable accuracy cycle after cycle.