There's not much disagreement among motion control companies about what changes in technology have the biggest impact on the use of motors/drives in machine building and performance.
"The advent of distributed control platforms via fieldbuses vs. localized control had the biggest impact on the use of motors/drives in machine building," argues Warren Osak, president of Servo2go.com (www.servo2go.com).
Modern, high-performance fieldbus networks eliminated the bottleneck in communication between drives and the motion control system, adds Joey Stubbs, PE, PMP, North American representative of EtherCat Technology Group (www.ethercat.org).
"It has to be the evolution of the communications interface—allowing drives to become much more flexible and controllable," agrees David Greensmith of Baldor Electric's motion control business unit (www.baldor.com).
"Drives and controllers have enhanced the performance and versatility of motors," concurs Max Wietharn, vice president of sales and marketing for IMS Schneider Electric Motion (www.schneider-electric-motion.us).
It's customization, believes Jay Schultz, product manager, Parker Hannifin (www.parker.com). "Product differentiation is becoming more difficult at the component level and the machine level," he says.
"With the rising cost of energy, variable frequency drive (VFD) use has risen," offers Adam Willwerth, sales and marketing manager at Electro Static Technology (www.est-static.com).
"Cost and ease of use have had huge impacts on the use of motors and drives in machines," adds Joe Kimbrell, motors and drives product manager, AutomationDirect (www.automationdirect.com).
The power of microprocessors and DSPs have been the driver, adds Atef Massoud, motion and drives engineer, Automation Technologies Group, Omron (www.omron247.com).
"The ever-decreasing cost of brushless motors and servo amplifiers allows machine builders to use brushless motors where they would not have been able to afford to in the past," concludes John Walker, vice president of customer service and marketing at Exlar (www.exlar.com).
e100 drive is compatible with EtherNet/IP, Modbus TCP, Powerlink, standard TCP/IP networks and the Mint system-building environment. The three-phase drives have a dc bus system to share regenerated power with other axes. With local I/O and CANopen expansion, many drives have option card slots, and include universal encoder feedback input, programmable notch filters to eliminate mechanical resonance effects.
Direct-drive SGMCS servo motors include six frame sizes in 17 models, ranging from 15 in.-lb peak in a 135 mm diameter package to 5,310 in.-lb peak in 360 mm diameter, up to 500 rpm, 20-bit resolution per rotation and integrated bearings that allow 16,000 lb of axial thrust load and 350 Nm of radial moment load.
ASRT IP66-rated, direct-drive, sealed rotary stage provides precise angular positioning in hostile environments. Dual large-diameter bearings control tilt-error motion (3 arc sec), moment stiffness, and repeatability (1 arc sec). Maximum rotary speeds are 100–200 rpm, and the unit uses a brushless, slotless motor, so there are no brushes to wear, no gear trains to maintain and high acceleration and high speeds.
RDD-Series direct-drive, rotary servo motors minimize the need for power transmission devices and can reduce machine complexity, system compliance and energy consumption, while delivering high dynamic performance, fast settling times and better overall load control.
|Bring the Power
120 kW module for Acopos mult-servo drives provides inverters and power supply modules with maximum rated values to 165 A. Startup currents are reduced up to 60%, minimizing wire size and fuse/circuit breaker size. Stabilized dc bus means motors have identical characteristics globally, and it eliminates upstream transformers.
B&R Industrial Automation
|Talk to the Encoders|
IndraDrive Cs Economy low-power servo drive has a compact design and supports SERCOS III. It has a multi-encoder interface, supporting Hiperface, EnDat 2.1 and 2.2, 1Vss, 5 V TTL, and MSM and MSK servo motors, and can be equipped with Safety-On-Board features such as Safe Torque Off and Safe Brake Control