On Mon, 22 Jun 2020 16:30:01 +0000, Doug wrote: >Yes its true, but before you let a disk spin backwards, you checked the >fans in the logic gate, they were 3 ph too. Depending on how they spun >(clockwise or counterclockwise), you had the phases corrected. I never >spun up a drive that went backward using that technique. >And if it was say a 2365, or a 2860 or 70, it would power up just fine, >then get a thermal since the fans were spinning in the wrong direction. > There are circuit diagrams of various phase testers on the WWW, But I'd think the ideal is a vane on a microswitch. That verifies: o Correct phasing. o Fan operation. o Unimpeded intake duct.
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