|Forum topic by JMB||posted 09-23-2010 09:05 AM||3841 views||0 times favorited||17 replies|
09-23-2010 09:05 AM
I just bought a used Delta 50 – 850 roll around dust collector. LAST NIGHT. I got it to the shop this morning, immediately connected it up to my planer and went to work. After operating for less than two hours, smoke was pouring from the power switch. I immediately shut down the unit, but the damage was done – The plastic switch housing, which had been in direct contact with the metal motor housing, had melted clear off. the only thing holding it in place were the fabric coated lead wires from the motor to the wire harness. On close inspection, the motor housing was so hot I almost burned myself when I touched it. What the heck?!
I bought it used from a guy who used to own his own furniture shop. it was gathering dust (the regular kind of dust). in his garage for a few years from what I gather. I like to give people the benefit of the doubt, especialy a fellow woodworker. I don’t think he “knowingly” sold me a lemon. So something else has to be going on here…
The unit was theoretically set up for 115V 20 A power.
It had no plug when I bought it. We wired up a brand new 115 V replacement plug from Menards. Black to blank, white to white, green to green. Pretty sure it was wired correctly.
I was using the collector to suck up dust from my 20” Grizzly planer. 5 inch dust port on the planer fed into a 5” to 4” reduced, reducer to 4 inch flex hose, hose to stock 4 inch port on dust collector. Dust collector had the standard wye with two 4” ports. Secondary port was plugged.
The motor gave no signs of struggling or bogging. It was running really well and sucking up every bit of dust from my 20” planer. There was no buildup in any of the hoses or connections.
So what happened here?
Did I run it for too long? If so, Delta has some explaining to do. I can’t believe a dust collector would overheat after an hour or so of work. I used to run roll-arounds at my previous job for hours without problem.
Is it possible the wire harness was swapped over to 220V 3 phase? I don’t know much about electricity. But I would imagine that, if that was the case, the machine would either bog down for lack of power, or not work period. But, perhaps it would run, but draw so much amperage that the motor would over work itself and overheat? I dunno.
I can rebuild the wire harness from steel sheet. But that would be treating the symptom, not the problem. Why did this overheat? How can I prevent it from happening again?
-- If I can't fix it, it wern't broke in the first place!