Suite of power-cutting control applications
Machine tool idling, unnecessary pump rotation and continuously running peripheral equipment drive up machining costs. These energy wasters are in the crosshairs of a new suite of power-cutting control applications from Japanese machine tool builder Okuma Corp.
Machine tool idling, unnecessary pump rotation and continuously running peripheral equipment drive up machining costs. These energy wasters are in the crosshairs of a new suite of power-cutting control applications from Japanese machine tool builder Okuma Corp.
The apps, known collectively as ECO suite, are available on Okuma machines with the OSP open-architecture CNC. Included in ECO suite is ECO Idling Stop, billed as the world’s first app able to eliminate machine tool idling. It monitors milling and turning spindles and automatically turns off spindle coolers when cooling is completed. Okuma claims the app has achieved energy savings of nearly 75 percent in noncutting operations over a 1-month period.
ECO suite apps are available on Okuma machines with the OSP open-architecture CNC. Image courtesy Okuma America.
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April 2016
Another part of ECO suite is the optional ECO Hydraulics. Typical hydraulic pumps lack pressure feedback and simply run at a constant speed, said Brad Klippstein, controls product specialist at Okuma America Corp. When pressure in the hydraulic system is not being used to do work, it is relieved through a pressure-regulator valve, producing a good deal of heat in the process. ECO Hydraulics provides feedback that allows it to vary pump rotational speed to regulate pressure. As a result, there is no longer any need to waste energy by relieving excess pressure through a regulator valve.
In addition, Klippstein said, the pump can be slowed when the hydraulic system isn’t doing any work. Demonstrations have reportedly shown that ECO Hydraulics can reduce pump power consumption more than 60 percent by minimizing unnecessary rotation.
A third energy-saving app—ECO Operation—lets machine operators set time limits for peripheral equipment, such as chip conveyors and mist collectors, so the equipment automatically stops after cutting is finished. A fourth app, ECO Power Monitor, shows power-consumption levels for spindles, feed axes and peripheral equipment, and lets operators see how much energy is being saved via the machine tool’s display.
Should the size of a company’s energy bill affect its level of interest in the ECO suite? “Absolutely not,” Klippstein said. “You’re still saving money with this, no matter what your energy costs are.”
For more information about Okuma America Corp., Charlotte, N.C., call (704) 588-7000 or visit www.okuma.com/americas.
