Carpentry and Woodworking - Table saw not running at full speed
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Dan Thompson
01-18-05, 02:46 PM
I was cutting some Ash this morning and between each setup I would turn the saw off.
I cut for about 2 hours on and off before I started cutting the Ash. Everything was fine until my last setup when I turned the saw on I would only turn over pretty slowly, about 500-1000 rpm. I turned if off and check the motor case for heat. It was warm but I could keep my hand on the motor as motor was not that hot.
I let the motor rest for about half hour and tried again. Same problem.
I check the price on the motor ($224.00) so I wan to make sure what the problem is before I start spending any money on it.
The saw is a DW746 DeWALT. It is pretty heavy so I don't think I can take it to a DeWALT repair station.
Any ideas?
TIA
After writing the above, I tried the saw again and it worked fine. It is fairly warm here, in the be 80's so maybe the motor just got too warm or maybel the electricla service is changing with all the air conditioners on.
I cut for about 2 hours on and off before I started cutting the Ash. Everything was fine until my last setup when I turned the saw on I would only turn over pretty slowly, about 500-1000 rpm. I turned if off and check the motor case for heat. It was warm but I could keep my hand on the motor as motor was not that hot.
I let the motor rest for about half hour and tried again. Same problem.
I check the price on the motor ($224.00) so I wan to make sure what the problem is before I start spending any money on it.
The saw is a DW746 DeWALT. It is pretty heavy so I don't think I can take it to a DeWALT repair station.
Any ideas?
TIA
After writing the above, I tried the saw again and it worked fine. It is fairly warm here, in the be 80's so maybe the motor just got too warm or maybel the electricla service is changing with all the air conditioners on.
GregH
01-18-05, 05:38 PM
You might try unplugging the saw and carefully blowing the dust out of it if it's an open type motor.
Blow it out good but be carefull not to stick the blow nozzle in far enough to scratch the windings.
Be aware as well that athough not common, it is possible for a bit of dust to get caught in the centrifugal switch where you might have to open the motor to clear the points.
Blow it out good but be carefull not to stick the blow nozzle in far enough to scratch the windings.
Be aware as well that athough not common, it is possible for a bit of dust to get caught in the centrifugal switch where you might have to open the motor to clear the points.
Herm
01-18-05, 07:33 PM
Dan,
I think I can speak for - well at least for the people in the Midwest. Let's see, it's zero out right now and getting colder, so the talk of air conditioners is just a dream for us.
anyway,
I would definitley try what GregH suggested.
It could have been a power surge. Hopefully that's all.
I think I can speak for - well at least for the people in the Midwest. Let's see, it's zero out right now and getting colder, so the talk of air conditioners is just a dream for us.
anyway,
I would definitley try what GregH suggested.
It could have been a power surge. Hopefully that's all.
Dave_D1945
01-19-05, 08:02 AM
Were you using an extension cord? Is the wiring in your shop in good shape? Dust could certainly be the problem, but if this happens again, check your wiring.
An undersized extension cord will get pretty warm when you're doing heavy cutting and loose connections can also cause problems.
An undersized extension cord will get pretty warm when you're doing heavy cutting and loose connections can also cause problems.
GregH
01-19-05, 11:57 AM
Ya, Herm, me too.
The airconditioners I dream about are the one's that I'm waiting for the purchase order to install! :D
The airconditioners I dream about are the one's that I'm waiting for the purchase order to install! :D