Q: Most heavy machinery is designed to be run on three-phase electrical power, but a number of options are available to get the tools running in your one-phase home shop. I am thinking of buying some used industrial equipment from a local cabinetmaker, but all of the machines have three-phase motors. This is for my home shop, where I have only single-phase power.

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Is there anything I can do to convert these machines to operate on single-phase power? Franklin Maeve, San Diego, CA A: Most heavy machinery is designed to be run on three-phase electrical power because three-phase motors are simpler, more efficient and sturdier than single-phase motors. Unfortunately, three-phase power generally is not available in residential areas, but it may be worth checking with your power company. Even if it is available, the cost of connecting may be financially prohibitive. Short of running three-phase power, there are a number of options available to get a three-phase tool running on single-phase power. The first and most obvious option is to replace the machine’s motor with a single-phase unit. Omnipage Pro X For Macintosh Free Download here. But this may not be possible on some machines because the original motor has special mounting brackets or the drive shaft has custom threads or splines.

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Unfortunately, specialized motors are fairly common on tablesaws. If the tool’s manufacturer is still in business, you may be able to obtain a single-phase motor from them. More on Machinery Another option is to use a converter that will allow you to run a three-phase machine on single-phase power.

There are three basic types of converters: static, rotary and electronic. Of the three, the static type is the least expensive. A static converter has no moving parts and needs to be sized for the motor it’s running. Unfortunately, a static converter reduces the available horsepower of the motor by about a third and has difficulty starting air compressors, dust collectors, large bandsaws and other machines with heavy starting loads. The Realms Of Being Santayana Pdf Reader. The reduced horsepower often isn’t a problem and can be compensated for by reducing the feed rate or by taking lighter cuts. But overloading or stalling a motor hooked up to a static converter will cause destructive overheating of both the motor and the converter.

A hard-to-start machine can be run by first starting another lightly loaded machine, an “idler” that serves as an electrical flywheel to start the second machine. A surplus three-phase motor can be used as a dedicated idler that runs continuously to improve both the starting and the running of other motors hooked up to a static converter. A rotary converter, which looks like a heavy-duty electric motor with an over-sized junction box attached, functions as both a motor and a generator. As a rotary converter is spun by single-phase power, it generates three-phase power to run other machines.