un plug first. Magnetic switches do turn on by ... - Family Woodworking

I remember hearing about this one time but never really payed it any attention. I often change blades without unplugging the machine. I never really thought it would actually turn on by itself.

now I know better but luckily I was not hurt. The Large RAS I recently purchased has a magnetic switch box. I had to remove it to get to the wire inside. it bolts to the frame and before I put it back in its place I did a few test runs to make sure everything was ok. the box has enough wire attached to it so it can be pulled up above the frame and worked on. i set it on the frame and ran the machine a few times. it was set at an angle with one side a little higher than the other, the high side sitting on a higher piece of the frame.

I had just turned the RAS off and it was winding down when the box slipped, causing the high side of the box to fall flat, actually a very short drop of maybe a 1/4". the blade was almost stopped and then came roaring back to life. I was amazed to say the least.

I will always unplug before working on any machine again.

Source: http://familywoodworking.org/forums/showthread.php?26921-un-plug-first-Magnetic-switches-do-turn-on-by-themselves

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