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| Adam |  Variable speed drivesJune 6th, 2005 04:25 AM June 6, 2005 Variable speed drives Being a ShopSmith owner (multi-purpose power woodworking tool with variable speed drive - like the Craftsman wood lathe's drive), I just remembered the caution to power down the unit at its lowest speed. This was done to both reduced strain on the shifting mechanism and to dramatically reduce strain on the power tool when starting up. Better to have low rpms at high torque when starting vs. the reverse with a mechanical speed shifting unit. Now the electrical multi-speed units, like fans, do well with full voltage (High setting) for starting up. I'd bet there would be a lot more happy satisfied customers of variable speed machines if this point was stressed harder. Maybe a sticker on the front of the machine to dial low before shutting down? |
| Joe | Similar June 6th, 2005 12:20 PM Much the same way you should let a turbocharged car idle for a half a minute before shutting it down (to prevent oil coking). Also, you should shut off your car accessories before you turn off the ignition. Why? Because there is an instant draw when you start the vehicle up the next time. How many of us that fix cars have gotten into a car when you turn the key and the radio is at full blast, the A/C fan on high and every device on the car is on? LOL. |
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