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Is Your Rexroth TVD Power Supply the Problem? 0

Posted on 11, July 2018

in Category Blog


Is Your Rexroth TVD Power Supply the Problem?/blog

Troubleshooting problems in industrial motion control systems doesn’t mean trying to fix components in their places. At least not when it comes to Rexroth components. The downtime involved is unacceptable.

Lost production is the most immediate and obvious cost of downtime. Experts in the subject estimate that U.S. factories lose 5 to 20 percent of their production to downtime. Every occurrence costs money in the shape of all the profit on every unit not produced during that time. At the speed of production provided by automation, that usually means hundreds of dollars each minute.

The cost of labor adds to downtime costs. People are being paid for time during which they can’t do their jobs. When stress and the need for multiple workers to focus on the machine problems are added in, the cost of downtime can be greater than the simple cost of paying people to wait for a machine to be fixed. The diversion of workers’ attention extends beyond the line operators and beyond the time spent directly working on the problem.

The solution? Rexroth’s modular system allows you to pull out the faulty part and replace it with another part.

That makes the top job a simple one: figure out which part is at fault.

The servo, the drive, the control? How about the power supply? This potential problem can be overlooked.

The Rexroth TVD makes things easier with an LED light display. If there’s a problem, it can be shown in two ways: no green lights, or red lights.

If the H1B green light is off, the signal voltage is faulty. No H2B green light?  Either the TVD power supply module or the drive may be the problem. A lack of the H3B green light signals a problem with the connected oad — or the mains voltage may be too low. The H4B green light goes off when the power rectifier or mains contactor is at fault.

The red lights are off when things are going well. They flash when a problem is detected. The H1B red light alerts you to a short circuit in the TVD, the cable, the drive, or the motor. The H2B red light means that braking power is heading out of the permissible range. The H3B red light flashes when the unit temperature is too high. The H4B light doesn’t flash; this light is triggered when the voltage is too high. All four of the red lights show as a steady light when the problems have triggered a shutdown.

Use these diagnostic displays to narrow down the problem. If the TVD is at fault, shut down the power, remove the faulty component, and replace it with a good one.

The faulty TVD should then go for factory repair. Since third-party shops don’t have access to the original parts, factory repair is the only safe option. Contact us immediately when you need factory repair. Not only can we get the repairs done fast, we can also supply emergency units immediately. Minimizing downtime saves you money in the long run. Call (479) 442-0390 for solutions.

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