Software helps improve surface finish and cycle times.

Press Release Summary:

With Servo and Spindle High-Response Vector Software v4.0, high-speed and high-precision machining is achieved via use of servo processor at nanometer level of interpolation. It utilizes 16 mm count pulse coders, resonance filters, DSP technology, and FANUC FSSB communication system. Software can close current loop in 31.25 µs, velocity loop at 62.5 µs, and position loop at 250 µs, and dedicated spindle processor helps achieve 12 kHz PWM frequency.

Original Press Release:

GE Fanuc Introduces New Servo and Spindle High-Response Vector Software Version 4.0 (HRV4) to Improve Surface Finish, Cycle Times and Accuracy

Charlottesville, va, july 15, 2005 - Machine tool builders and end users who demand the highest precision from their machines can see improvements in surface finish, cycle times and accuracy with the new Servo and Spindle High-Response Vector Software Version 4.0 (HRV4) from GE Fanuc Automation Americas, Inc., a unit of GE Industrial. Driving servo technology to the next level, the Servo and Spindle HRV4 features state-of-the-art processors, high-resolution 16MM count pulse coders, resonance filters and DSP technology.

"GE Fanuc servo and spindle motor performance continues to increase, and servo and spindle software must be capable of realizing these performance increases to achieve maximum results," explained Paul Webster, CNC motion manager for GE Fanuc Automation. "With the Servo and Spindle HRV4, high-speed and high-precision machining is achieved by using an ultra-fast servo processor at the nanometer level of interpolation. These features are a logical progression in the development of exceptional servo systems."

Servo and Spindle HRV4 is an advanced form of FOC (Field Oriented Control) that capitalizes on the current generation of high-speed DSPs and the FANUC FSSB communication system. Today's high-speed DSPs allow servo feedback data from the encoder and amplifier to be interpolated in a significantly shorter amount of time. Servo HRV4 closes the current loop in 31.25 ?s, the velocity loop at 62.5 ?s and the position loop at 250 ?s. Spindle HRV4 relies on a dedicated spindle processor to achieve a 12khz PWM frequency.

The current and velocity loops of the HRV4 are twice as fast as the industry-leading Servo HRV3, and the position loop is four times as fast. Spindle HRV4 allows for PWM switching, utilizing a lower PWM rate for low-speed torque and then increases the PWM rate up to 12Khz, allowing for higher spindle speeds, tighter control and lower heat losses. In addition, auto-following filters help to eliminate mechanical resonance. The HRV4 is a valuable addition for nano machining with GE Fanuc's highly advanced Series 30i CNC.

About GE Fanuc Automation

GE Fanuc Automation, a joint venture between GE and FANUC LTD of Japan, delivers automation hardware and software designed to help users reduce costs, increase efficiency and enhance profitability. With solutions and services catering to virtually every industrial segment, GE Fanuc Automation provides a diverse array of capabilities and products, including controllers, embedded systems, advanced software, motion control, CNCs, operator interfaces, industrial computers, and lasers. Headquartered in Charlottesville, VA, GE Fanuc Automation is a part of GE Industrial and combines the diverse global strengths of the GE family with the local presence customers need to design, develop and maintain their automation investments.

For more information, visit or contact: GE Fanuc Information Center, P.O. Box 8106, Charlottesville, VA 22906, Phone: (800) GE FANUC (800-433-2682), Fax: 434-978-5205, e-mail:

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