different lathe problem

Home Forums General Mods/Machinists different lathe problem

Viewing 6 posts - 1 through 6 (of 6 total)
  • Author
    Posts
  • #428
    skybones
    Participant

    I was turning down the breech end of a new barrel tonight was almost done ,when the motor slowed way down and started a nasty buzzing/ growling sound. The motor was pretty warm ,but the shaft turns freely. I haven’t found a place for brushes yet. Anybody got any ideas. The start capacitor is only for starting right? Would the switch go out while the motors turning. Thanks for any help on this, I was so close to being done,and shooting it tomorrow. thanks tz

    #24781
    martin777
    Participant

    Need some more info. What lathe do you have? Motor specs? Variable speed? If it’s just a plain ol’ AC cap. start induction motor check the bushings. Worn bushings will not allow the rotor/stator to self-align (clearances are TIGHT!) and will cause similar “locked-rotor” symptoms. You can live with quite a bit of end play but NO up/down slop! Start cap? Yes-it’s only for starting. Must be a pretty stout motor. Look for that cap. leaking oil/goo and/or any evidence stuff of getting hot. If the switch were funky you’d
    probably smell it. Check for a voltage drop at the motor. There are no brushes. Those motors usually last a LONG time.

    #24782
    skybones
    Participant

    Thanks Martin, it’s an older Emco Compact 5 . No play in shaft , no burnt wire smell, shaft turns freely by hand. The motor was pretty warm! I bought it used yrs ago, have turned a few wedding bands out of hard carving wax on it over the years and have found little if any play in any of the moving parts. Speed is set by placement of belts. I don’t know, I’ll try it again in the morning,if it doesn’t crank up, i’ll take my barrel out of the chuck and check it out further. Thanks for the reply, tz

    #24797
    shadoh
    Participant

    Edit: Double post.

    #24798
    shadoh
    Participant

    Do you have a multimeter and know the basics of how to use one? Even a cheap AC test probe could help you narrow it down but it would be allot harder to use for that purpose.

    #24813
    skybones
    Participant

    Thanks for reply Shadoh , no I don’t have a meter anymore.I could buy one ,but wouldn’t know what I was reading. To be honest, electricity! scares the crp out of me. Thanks again , tz

Viewing 6 posts - 1 through 6 (of 6 total)
  • You must be logged in to reply to this topic.