Mike Goetzke
12-27-2013, 10:36 AM
I'm trying to find time to turn but other things keep getting in the way...and I'm the culprit! On black Friday I bought an early 50's Unisaw for $150. Was thinking of just flipping it but always wanted to restore a Uni that was around my age (I'm 57):
http://img.photobucket.com/albums/v212/mbg/My%20Tools/Delta%20OldUnisaw/IMG_1040_zpsa26c9e74.jpg (http://smg.photobucket.com/user/mbg/media/My%20Tools/Delta%20OldUnisaw/IMG_1040_zpsa26c9e74.jpg.html)
I even got brave and tore the "bullet" motor apart. First thing I saw was I needed to clean up the copper commutator. The motor shops in the area didn't want to touch it so:
http://img.photobucket.com/albums/v212/mbg/My%20Tools/Delta%20OldUnisaw/Motor/IMG_0004_zps8cea74ce.jpg (http://smg.photobucket.com/user/mbg/media/My%20Tools/Delta%20OldUnisaw/Motor/IMG_0004_zps8cea74ce.jpg.html)
I was able to measure arbor shaft and commutator run-out and if anything the total run-out of the comm got slightly better after cleaning. I only needed to take around 0.010" off and I took my time at it.
Later I had to make a new throw-out weight spring. It is commonly called a necklace or shorting spring. I made one according to some info I saw at OWWM but it seemed larger than the original. Rather then re-make one or put it in the motor and try it out I was able to chuck it on the lathe and use the digital speed readout the determine the throw-out speed (also saw this on OWWM).
Hopefully I'll get the saw done in the next couple of weeks.
Mike
http://img.photobucket.com/albums/v212/mbg/My%20Tools/Delta%20OldUnisaw/IMG_1040_zpsa26c9e74.jpg (http://smg.photobucket.com/user/mbg/media/My%20Tools/Delta%20OldUnisaw/IMG_1040_zpsa26c9e74.jpg.html)
I even got brave and tore the "bullet" motor apart. First thing I saw was I needed to clean up the copper commutator. The motor shops in the area didn't want to touch it so:
http://img.photobucket.com/albums/v212/mbg/My%20Tools/Delta%20OldUnisaw/Motor/IMG_0004_zps8cea74ce.jpg (http://smg.photobucket.com/user/mbg/media/My%20Tools/Delta%20OldUnisaw/Motor/IMG_0004_zps8cea74ce.jpg.html)
I was able to measure arbor shaft and commutator run-out and if anything the total run-out of the comm got slightly better after cleaning. I only needed to take around 0.010" off and I took my time at it.
Later I had to make a new throw-out weight spring. It is commonly called a necklace or shorting spring. I made one according to some info I saw at OWWM but it seemed larger than the original. Rather then re-make one or put it in the motor and try it out I was able to chuck it on the lathe and use the digital speed readout the determine the throw-out speed (also saw this on OWWM).
Hopefully I'll get the saw done in the next couple of weeks.
Mike