GE Fanuc introduces vector software to improve surface finish, cycle times, accuracy

Charlottesville, VA—GE Fanuc Automation Americas Inc. reports that 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 GE Fanuc’s Servo and Spindle high-response vector Version 4.0 (HRV4) software.

07/19/2005


Charlottesville, VA— GE Fanuc Automation Americas Inc. reports that 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 GE Fanuc’s Servo and Spindle high-response vector Version 4.0 (HRV4) software. Servo and Spindle HRV4 features new processors, high-resolution 16 million count pulse coders, resonance filters, and digital signal processor (DSP) technology.

'GE Fanuc’s 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,' says Paul Webster, GE Fanuc Automation’s CNC motion manager. '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 field-oriented control (FOC) 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 faster. Servo HRV4 closes the current loop in 31.25ìs, the velocity loop at 62.5 ìs, and the position loop at 250 ìs. Spindle HRV4 relies on a dedicated spindle processor to achieve a 12 kHz PWM frequency.

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

Control Engineering Daily News Desk
Jim Montague, news editor
jmontague@reedbusiness.com





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