Jump to content


Photo

I found where the magic smoke escaped


  • Please log in to reply
14 replies to this topic

#1 maccrazy2

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

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

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

Posted 15 December 2019 - 09:16 PM

The burnt spots.

Attached Files



#3 maccrazy2

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

Posted 15 December 2019 - 09:17 PM

One winding.

Attached Files



#4 drhardin

drhardin

    Advanced Member

  • Moderators
  • 118 posts
  • LocationNorth East Ohio

Posted 15 December 2019 - 11:30 PM

Now i understand your handle   mac crazy 2 :mrgreen:


  • gbull likes this

#5 maccrazy2

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

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

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

Posted 17 December 2019 - 02:17 PM

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

Attached Files



#7 drhardin

drhardin

    Advanced Member

  • Moderators
  • 118 posts
  • LocationNorth East Ohio

Posted 17 December 2019 - 09:28 PM

Very impressed. Keep us updated.



#8 maccrazy2

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

Posted 30 January 2020 - 08:55 PM

So this was my $9 winder. I bought the counter to keep track of the winds.

Attached Files



#9 maccrazy2

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

Posted 30 January 2020 - 08:56 PM

First set of windings.

Attached Files



#10 maccrazy2

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

Posted 30 January 2020 - 08:57 PM

And all windings in.

Attached Files


  • bruski likes this

#11 maccrazy2

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

Posted 30 January 2020 - 08:59 PM

Stator lacing and after varnishing.

Attached Files


  • bruski and Cutter like this

#12 maccrazy2

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

Posted 30 January 2020 - 09:02 PM

And back in the machine and it is working great. It feeds a square piece of wood in the left and spits out a dowel on the right. An 18inch piece in under 10 seconds.

Attached Files


  • bruski and Roller like this

#13 maccrazy2

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

Posted 30 January 2020 - 09:05 PM

Left to right my initial test cuts. Got the blades set up and cutting well. I just sent them off to get them reground properly. Now I just need to get it all cleaned up and it will be ready to go.

Attached Files



#14 maccrazy2

maccrazy2

    Advanced Member

  • Members
  • PipPipPip
  • 194 posts

Posted 30 January 2020 - 09:08 PM

So total cost minus labor of course. About $95, a new motor was about $750 after shipping. I found a couple cheaper but they were not in stock.

#15 drhardin

drhardin

    Advanced Member

  • Moderators
  • 118 posts
  • LocationNorth East Ohio

Posted 31 January 2020 - 08:43 PM

I am very impressed, nice work. Thanks for the post. I did learn a lot.






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users