Captain Suave
Caesar si viveret, ad remum dareris.
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I hate a dewalt battery orbital sander. It's hooked up to a dust collection hose that goes to a dust separator, then a shopvac. The shopvac is two prong, no ground.
Every time I sand epoxy, the sander shocks the living shit out of me every 2 or 3 seconds. I also hear it affecting the sander as the RPMs decrease a bit, then ramps back up to full speed every time it shocks me. The shock comes from the speed dial on the sander.
I got some 14g wire and attached it to a bolt in the floor, then wrapped around the outside of the dust collection hose right where it connects to the sander (with an alligator clamp to the hose clamp that holds it on). That didn't change anything, so I wired it up to the ground prong on a 3-prong plug and plugged it in to a wall outlet. That didn't change anything either.
What's the trick to discharging some of the static electricity that this fucking resin builds up? Do I need a bare wire running through the INSIDE of the hose or something?
Any chance the outlet you're using is accidentally wired with reverse polarity (flipped hot/neutral)? Try the sander on a different outlet on a different circuit. If something is miswired upstream on the cirtuit all the downstream outlets can be affected.
Take a multimeter and test the voltage between ground and a metal part on the sander. If it's causing the motor to change RPM this sounds like a more serious problem than static.
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