|Forum topic by Planeman40||posted 09-20-2014 04:00 PM||2528 views||0 times favorited||14 replies|
09-20-2014 04:00 PM
I had to call the fire department a few days ago as I kept smelling burnt electricals somewhere in the shop and couldn’t locate it. They came and smelled it too and they couldn’t find the problem even with a heat detector. After they left, I sat down at my work bench and began working, keeping on the alert for the problem. After a short while I reached over to pick up my new “rebuilt” Dremel 3000 (the one with multiple speeds set by shifting the switch). Some paper was on top of it and when I picked up the paper I found the new Dremel was smoldering!!! I immediately unplugged it and let it cool down. The windings had cooked and the on/off/speed selection switch was burnt and frozen solid in what appeared to be the “off” position. The Dremel had somehow started by itself overnight and the little wire brush in the collet had wrapped itself around a Zip-Loc bag and had stalled the Dremel out.
I sent it off to Dremel repair and received a replacement Dremel 3000 immediately. I plugged in the Dremel replacement and began to investigate the operation of the switch. After a few minutes it became obvious to me what had happened. The switch has nice positive detents between the speeds and the off position, however the switch position at the lowest speed had a small position within that detent that turned the motor off even though the off position was one detent over to the right. It was obvious that I had intended to slide the switch to the off position and hit the point in the low speed selection of the switch that turned off the motor even though the switch had not been moved to the true “off” position. With the motor no longer running, I put the Dremel down thinking I had turned it off. Somehow it had turned on again by itself overnight.
I was very lucky there was no fire, but there is a permanent scorched area on the right side of my bench to remind me.
So all of you Dremel 3000 owners be aware of this and be SURE the switch is always turned off in the proper “Off” position.
-- Always remember: It is a mathematical certainty that half the people in this country are below average in intelligence!