Re: Henry's 55 Constellation
Posted by HH56 On 2008/8/15 8:42:23
At this point any number of things. When it didn't rotate in either direction, and after looking at your pictures again, suspect the brushes not making good contact with armature or a broken connection to the brushes somewhere.
One of the brushes connects to motor case or ground, the other connects to the 2 field coils. The other end of the field coils connects to the terminals outside. I really can't tell much from picture but from top of brush, it looks like motor has either been submerged in water or the condensation over years has messed things up, so a dirty or broken connection somewhere is a real possibility.
The armature turning is a good thing for starters, lets try cleaning brushes a bit. First, GENTLY lift up (don't pull the fine copper wire) against the spring pressure and make sure both brushes have some tension. Look carefully for any broken wires. If good so far, then suggest starting with a can of contact cleaner from Radio Shack or electronics store and spraying the brush and commutator (copper bar area) & turning armature at same time to get under brushes. Blow it dry and then get a strip of fine sandpaper (300 grit or so) narrow enough to fit on the copper bar area. Be sure it's sandpaper, NOT emery cloth. GENTLY lift up the brush and put it on copper, grit up against brushes and GENTLY pull through to clean brush, do the other, then turn over and clean all copper bars. Spray more contact cleaner and blow dry again. Then connect jumper cables, POS to frame, neg to ONE terminal and try again.
By connecting both terminals before, it connected field coils in series. Hopefully it wasn't on long enough to do any damage, but smoke is never a good thing unless it's in a fireplace. If cleaning doesn't help, then you'll have to remove motor section and have repaired or replaced but try this first.
Attach file:
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One of the brushes connects to motor case or ground, the other connects to the 2 field coils. The other end of the field coils connects to the terminals outside. I really can't tell much from picture but from top of brush, it looks like motor has either been submerged in water or the condensation over years has messed things up, so a dirty or broken connection somewhere is a real possibility.
The armature turning is a good thing for starters, lets try cleaning brushes a bit. First, GENTLY lift up (don't pull the fine copper wire) against the spring pressure and make sure both brushes have some tension. Look carefully for any broken wires. If good so far, then suggest starting with a can of contact cleaner from Radio Shack or electronics store and spraying the brush and commutator (copper bar area) & turning armature at same time to get under brushes. Blow it dry and then get a strip of fine sandpaper (300 grit or so) narrow enough to fit on the copper bar area. Be sure it's sandpaper, NOT emery cloth. GENTLY lift up the brush and put it on copper, grit up against brushes and GENTLY pull through to clean brush, do the other, then turn over and clean all copper bars. Spray more contact cleaner and blow dry again. Then connect jumper cables, POS to frame, neg to ONE terminal and try again.
By connecting both terminals before, it connected field coils in series. Hopefully it wasn't on long enough to do any damage, but smoke is never a good thing unless it's in a fireplace. If cleaning doesn't help, then you'll have to remove motor section and have repaired or replaced but try this first.
Attach file:
(22.37 KB)
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