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Sparking Delta 10"

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Forum topic by JamesMop posted 11-06-2011 02:07 AM 2310 views 0 times favorited 6 replies Add to Favorites Watch
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JamesMop

3 posts in 1854 days


11-06-2011 02:07 AM

Hi,
I have a Delta 10” table saw with a motor mounted under the table, serial # 1313314.

It was running fine this morning when I started running some boards though. The motor started to sound like it was straining. I noticed that when I looked down the throat I could see the flashing of sparks, which I never noticed before, then a bit of burning saw dust fall to the floor

I shut the saw off to let it cool down. About an hour later I turned it on again, now, with even more sparking I cut a board, shut it off, and not I can not get it to turn on at all. When I spin the blade by hand it does not turn smoothly, there is uneven resistance and there is a whining sound. This makes me suspect the bearings are shot, but that doesn’t explain why it won’t turn on all of the sudden.

I would really appreciate any advice you can give.
Thanks!


6 replies so far

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Mickey Cassiba

312 posts in 2491 days


#1 posted 11-06-2011 02:18 AM

Unisaw, or Benchtop?

-- One of these hammers oughta fix that...

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JamesMop

3 posts in 1854 days


#2 posted 11-06-2011 11:14 PM

Unisaw, with a direct dribe motor

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Mickey Cassiba

312 posts in 2491 days


#3 posted 11-06-2011 11:45 PM

I’m a little confused…you say it’s a Unisaw, but with a direct drive motor? I worked for Delta for a long time, and all of the uni’s I worked on were belt driven…I ask, because the direct drive saws use a brush type motor and all the uni’s I’m familiar with use an induction motor. Can you shoot me a model number, I still have my service manuals…maybe we can get to the bottom of this. Feel free to PM me.

-- One of these hammers oughta fix that...

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knotscott

7207 posts in 2835 days


#4 posted 11-07-2011 01:25 AM

It sounds like a Delta benchtop saw with a universal motor. A Unisaw would weigh over 500#....if one of those is sparking it has big issues. (A pic would answer all questions about what type saw it is) Some arcing is normal for universal type of motors because they use brushes, but if it’s excessive it’s worth checking the condition of the brushes.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

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JamesMop

3 posts in 1854 days


#5 posted 11-07-2011 01:59 AM

Maybe it is a bench top (I’m really not sure), I’d say the saw and the stand it came on weight about 150# or so. Here’s an exploded view of my saw, the motor isn’t shown, but it is inside the table housing

View Bill White's profile

Bill White

4448 posts in 3420 days


#6 posted 11-07-2011 06:22 PM

Sounds like a brush problem to me. Possibly a stuck brushes or a really dirty armature. Have ya blown all the dust and crap out of the motor? Burning sawdust?
Bill

-- bill@magraphics.us

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