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  1. #1
    Join Date
    Feb 2012
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    Default Lathe motor problem

    When starting, after standing idle for awhile (overnight), the motor on my lathe runs very slowly for around 10 seconds+ before hitting top speed, after successive start ups, the delay shortens to around 3-4 seconds. I’m hoping/guessing it’s a capacitor. Any ideas?

  2. #2
    Join Date
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    Victoria, Australia
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    Default

    Quote Originally Posted by tongleh View Post
    When starting, after standing idle for awhile (overnight), the motor on my lathe runs very slowly for around 10 seconds+ before hitting top speed, after successive start ups, the delay shortens to around 3-4 seconds. I’m hoping/guessing it’s a capacitor. Any ideas?
    Hi tongleh,

    Yes, sounds like the start cap is on the way out, or there is a loose connection to the start cap. I'd replace it before it goes, When it let's go it will fill the shed with smoke..

    Was that the TOS?

    Regards
    Ray

  3. #3
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    Default Which one?

    I'm guessing the starter cap is the one with the highest value? TOSS?

  4. #4
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    Jun 2008
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    Default

    Quote Originally Posted by tongleh View Post
    I'm guessing the starter cap is the one with the highest value? TOSS?
    Yes, the smaller value will be the run cap.

    Regards
    Ray

    TOS? I thought from (obviously faulty memory) you had a TOS Lathe..

  5. #5
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    Feb 2012
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    Default Nope

    Nope, I have the Al250G. But never heard of a Toss.

  6. #6
    Join Date
    Jul 2003
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    Default

    So I guess that means you couldn't give a TOS?
    It's all part of the service here at The House of Pain™

  7. #7
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    Jun 2008
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    Default

    Quote Originally Posted by Greg Q View Post
    So I guess that means you couldn't give a TOS?
    Yep Czech.....


    By way of explanation....

    It's a Czecholslovak brand of lathe, there are the odd few around, and for some reason I thought you had one, I blame early onset dementia...

    Regards
    Ray

  8. #8
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    Default Toss-er

    You've probably just heard some refer to me as that Toss-er. Anyway, just did some more checks: with the belt off the motor starts fine and all the connection are ok, so I guess that cinches the deal, need a new start cap! There was another forum member who bought an AL250G, his caps blew up - spectacularly.

  9. #9
    Join Date
    Oct 2011
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    Norwood-ish, Adelaide
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    6,541

    Default

    Depending on temperature, it could be related to bearings and/or lubricant needing to warm up. If you took the belts off and it was fine then it could be that. I used to have that issue on a Dai-shin lathe that I had once.

    Michael

  10. #10
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    Feb 2012
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    Adelaide
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    Default Best Bet

    Maybe, I’ll replace it anyway just to make sure it doesn’t go at an inopportune time, just have to find someone who stocks them. I call it ‘Tongleh’s Law’, plenty of experience with that one.

  11. #11
    Join Date
    Aug 2011
    Location
    Melbourne
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    4,779

    Default

    Hi there,

    Ebay sell starter caps. Quite a few sellers last time I looked. OR, it could be a good excuse for a DC or 3 phase VFD conversion. No starter caps needed!

    Simon

  12. #12
    Join Date
    Feb 2012
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    Adelaide
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    Default Vroom, vroom.

    I never thought of looking on eBay, but will do now. I could look at a DC motor and VSD I suppose, imagine the possibilities: a VSD and a geared head… Vroom, vroom.

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