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Description

The Gozuk motor on this Unisaw was designed to spin at 3450 RPM, 60 Hz for a reason. I refrain from increasing the speed for fear of ruining the bearings at higher speeds. Likewise, running too slow places the motor in jeopardy of overheating. According to the experts (I use that term very loosely) I hang around, these AC motors should never be run at less than 75% or more than 125%. The ac drive is set at 60 Hz to run my saw and I don& acute;t see any reason to deviate from that.
Now a days AC Drives are available with enhance features like display unit (7 segment or LCD), user interface (keypad), programmability, different operating modes, etc. more advance AC drives can be configured in master-slave configuration many of them have serial interface to directly communicate with PC through hyper terminal.
Now, there is another aspect of bearing failure that can occur in a ac drive driven motor. The voltages that can build up on the motor shaft will likely be discharged to the bearings causing small pitting that progressively gets worse over time. I& acute;m not familiar with this situation happening on a ac drive controlled Unisaw motor but I have experienced it elsewhere. Buy ac drives from China.

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