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I found where the magic smoke escaped


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#1 maccrazy2

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Posted 15 December 2019 - 09:14 PM

I have a machine in my shop I bought years ago that I am finally getting around to getting it up and running. It’s a wood doweling machine. There are 2 motors both 3 phase. After some poking around I was able to determine the second motor had 2 poles reversed, wired to the wrong side of the magnetic connector and therefore the E stop would not shut it down. Also, located a fried terminal on a drum switch that took out was appears to be a newer baldor motor.
The motor ran but after 1 minute the case got hot in one spot and I could smell burning. After removing the motor and tear down the burnt windings were apparent. A quick trip to the motor shop ended as I expected. Cheaper to replace than rebuild. I know enough to be dangerous so I’m going to attempt the rewind myself. Last night I was able to map all the windings and removed one winding intact to use as a pattern for rewinding the new wire.
Located and ordered the magnet wire and insulation paper. Still looking for the correct cordage to bind the stator windings with. Also will order the varnish for the windings as well.

#2 maccrazy2

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Posted 15 December 2019 - 09:16 PM

The burnt spots.

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#3 maccrazy2

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Posted 15 December 2019 - 09:17 PM

One winding.

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#4 drhardin

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Posted 15 December 2019 - 11:30 PM

Now i understand your handle   mac crazy 2 :mrgreen:


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#5 maccrazy2

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Posted 15 December 2019 - 11:42 PM

Lol. Actually it refers to Mac machine guns.
Buying a new motor would definitely be easier $700 it just seems like a waste as this one probably has less than 3 hours of actual use. I bought the machine as complete but with “issues”

#6 maccrazy2

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Posted 17 December 2019 - 02:17 PM

Stator winding mandrels roughed out. I will clean up and radius the corners tonight.

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#7 drhardin

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Posted 17 December 2019 - 09:28 PM

Very impressed. Keep us updated.






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