Thanks Thanks:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Page 3 of 3 FirstFirst 123
Results 31 to 40 of 40
  1. #31
    Join Date
    Jul 2009
    Location
    Sydney
    Age
    45
    Posts
    42

    Default

    Might be a dumb question, but there is a large one and a small one on the motor, which is likely to be the start capacitor?

  2. #32
    Join Date
    Aug 2010
    Location
    Near Bendigo, Victoria, AUS
    Age
    72
    Posts
    3,102

    Default

    The larger one is likely to be the starting capacitor....
    Bu please check their labels. The one with highest uF number is the starter one. I may have a lower voltage rating than the run capacitor.
    Cheers, Joe
    retired - less energy, more time to contemplate projects and more shed time....

  3. #33
    Join Date
    Oct 2007
    Location
    Alexandra Vic
    Age
    69
    Posts
    654

    Default

    The caps should be labelled with two values, the capacitance in microFarads (uF), and the voltage rating (VAC).

    The cap with the greatest capacitance value will be the start capacitor, and would be the physically larger capacitor provided that both have the same voltage rating.

    If you are looking to replace either, you need the same capacitance as the originals, and a voltage rating the same as, or higher (never lower) than the originals. However higher voltage may be physically larger and might not fit in the original location/housing.

    If the motor is cap start/cap run as you are saying, I would try to source and replace both in one instance if possible, unless you are very close to a supplier, or can afford the time for repeat trips etc.
    I used to be an engineer, I'm not an engineer any more, but on the really good days I can remember when I was.

  4. #34
    Join Date
    Jul 2009
    Location
    Sydney
    Age
    45
    Posts
    42

    Default

    I Just removed the covers and had a look, and visually they both look fine.

    The spindle has light tension, just like similar models I have had in the past, and it runs fine. To check the bearings I left it running for an hour or so at 540 RPM and the spindle had only got slightly warm, there's no noise and it cuts smooth and accurate. So I don't think I have a mechanical issue.

    Should I just order the new starter cap and give it a run? The motor has power when it should, so I guess everything else should support function. Is there any way to test the existing capacitor? Or any point?

  5. #35
    Join Date
    Jul 2010
    Location
    Melbourne
    Posts
    9,088

    Default

    Quote Originally Posted by malb View Post
    whats the third one doing?
    Hi Malb,
    One is Fwd, one is Rev, the other is part of the "controls". It closes when the power is turned on(or the e/stop is removed) but only if the fwd/off/rev lever is Off. Its there so the machine won't restart if the lever is left in the on or rev positions after either lose of power or the E/stop has been used.

    At least thats how it is on my lathe

    Stuart

  6. #36
    Join Date
    Jul 2009
    Location
    Sydney
    Age
    45
    Posts
    42

    Default

    Thanks guys, I'll order these components and replace them when they arrive. Thanks a lot for the advise, it is greatly appreciated and I'll let you know how it goes.

    Cheers

    Tom

  7. #37
    Join Date
    Jul 2006
    Location
    Athelstone, SA 5076
    Posts
    4,255

    Default

    Quote Originally Posted by tbonesmith View Post
    Can't see the caps, where would they be? Sorry it's not a solenoid it's a transformer.

    Yeah, my sparky neighbour had a brief look and was no help.."... I don't know much about machines.."

    Would a regular electrician, be the person to sort this out?
    A regular sparky should be able to sort it out....sounds like you neighbour aint a sparky...

    Makes me wonder what they teach them at trade school these days

  8. #38
    Join Date
    Jul 2009
    Location
    Sydney
    Age
    45
    Posts
    42

    Default All Sorted

    Hi Guys,

    Thanks for the help. I ordered the start and the run capacitors from Hare and Forbes yesterday, they showed up today, and I put them in. All sorted, problem solved, and the machine runs like new.

    As I mentioned I levelled it and got it setup and the alignment is excellent and I don't expect any dramas from here. Did a couple of little jobs on it last night and I'm really pleased.

    Cheers

  9. #39
    Join Date
    Sep 2006
    Location
    Australind , WA
    Age
    58
    Posts
    1,277

    Default

    Quote Originally Posted by Stustoys View Post
    hmm I wonder whats its doing up there. There isn't a transformer in there as well?(although I do recall hearing that Hare and Forbes lathes use 240V on the controls???)

    Stuart

    My newer AL-330 uses 24 VAC for the control power. My step down TRFMR failed rather quickly so I replaced it with one from RS.

    It certainly sounds like one or both caps to me.

  10. #40
    Join Date
    Jul 2010
    Location
    Melbourne
    Posts
    9,088

    Default

    Quote Originally Posted by Sterob View Post
    My step down TRFMR failed rather quickly
    Yes, thats why I asked about a transformer....By the look of the box, the last transformer failed in a major way.

    Stuart

Page 3 of 3 FirstFirst 123

Similar Threads

  1. vfd question for my lathe motor
    By tanii51 in forum METALWORK GENERAL
    Replies: 5
    Last Post: 27th Jul 2011, 09:40 PM
  2. lathe thread question
    By turbo TA in forum METALWORK GENERAL
    Replies: 14
    Last Post: 28th Aug 2009, 10:06 AM
  3. Lathe question
    By lubbing5cherubs in forum METALWORK GENERAL
    Replies: 3
    Last Post: 30th Aug 2007, 11:02 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •