Search Results - Practical Machinist - Largest Manufacturing Technology Forum on the Web
Close
Login to Your Account

Search:

Type: Posts; User: JST

Page 1 of 60 1 2 3 4

Search: Search took 0.09 seconds.

  1. Replies
    4
    Views
    265

    They look like overloads, and would act to open...

    They look like overloads, and would act to open the contactor, normally by opening the control power to the contactor.. That could have something to do with your problem.

    That bluish stuff, is it...
  2. Thread: Help please

    by JST
    Replies
    3
    Views
    307

    Closed due to meaningless title (admin rules)

    Closed due to meaningless title (admin rules)
  3. Replies
    4
    Views
    224

    The cutouts can develop a bad connection, or even...

    The cutouts can develop a bad connection, or even be damaged when installed. After that, the high resistance of a bad connection will often cause them to open after some undetermined time. ...
  4. Replies
    4
    Views
    224

    If you leave it alone for a while, presumably it...

    If you leave it alone for a while, presumably it starts?

    Yes, likely the thermal cutout. It has one, probably a flat thing about 10 x 20 x 5mm that is stuffed in among the end turns pf the...
  5. Power should go to the "L" terminals, and motor...

    Power should go to the "L" terminals, and motor to the "T" terminals.

    Hopefully you did not damage anything.
  6. Replies
    15
    Views
    981

    It was N= 3 or 4 with that particular...

    It was N= 3 or 4 with that particular product..... Of course the other products are just that, different. Maybe better. Maybe the same.

    I've NEVER accepted the "cheaper means it fails"...
  7. Replies
    15
    Views
    981

    Interesting. We had a low volume product...

    Interesting.

    We had a low volume product that we used a Mean Well supply in. That model, at least, kept failing for no particular reason. We put the same rating from a different company in...
  8. Replies
    15
    Views
    981

    I know nothing at all about that company. they...

    I know nothing at all about that company. they could be good, or a maker of cheap imitations, I do not know. And I have never had one of their products.

    That said, the unit does cover most of...
  9. Replies
    22
    Views
    1,122

    Anything connected to the bus voltage could have...

    Anything connected to the bus voltage could have fried. Since the controls work, the "housekeeping" supply is good, and the capacitors (replaced) are good.

    Nothing is shorting across the bus. ...
  10. Replies
    24
    Views
    1,784

    They usually ARE coated. The silverish look is...

    They usually ARE coated. The silverish look is often from tin, which is resistant to many common corrosive materials, and is plated on the srands to resist corrosion.
  11. Replies
    22
    Views
    1,122

    Unless you can find some sort of external thing...

    Unless you can find some sort of external thing causing the problem, it is inside.

    Fixing VFDs with bad parts is a crapshoot, one that I would not spend much time on, and I have spent a number of...
  12. EXCELLENT! Glad you are back in business. The...

    EXCELLENT!

    Glad you are back in business. The 10A seems about right for low/no flow with a blower, given the marked FLA.
  13. Replies
    9
    Views
    662

    There are folks who run an entire shop off of one...

    There are folks who run an entire shop off of one VFD. It's a big one, in general, and essentially acts like a Phase Perfect, the frequency does not get changed.

    The key is it being large enough...
  14. Replies
    149
    Views
    11,600

    A while back you asked about making money with...

    A while back you asked about making money with what started as a hobby. Yes, totally possible. I have some folks I get jobs from. One a little while ago paid as much as I had paid for the...
  15. Replies
    71
    Views
    22,868

    Looks a heck of a lot like part of a torpedo. ...

    Looks a heck of a lot like part of a torpedo. Those insets for screws to attach the afterbody, or warhead section, whichever. Don't see those at the other end, but..... Size looks about...
  16. Replies
    22
    Views
    1,122

    If just one of each pair of IGBTs is shorted, (or...

    If just one of each pair of IGBTs is shorted, (or even just one out of the 6) it will turn on, but will fault out with an overcurrent as soon as the output is enabled by trying to drive a motor.
    ...
  17. Replies
    7
    Views
    961

    Not everyone gets a driving lesson in what is...

    Not everyone gets a driving lesson in what is basically an antique halftrack.

    Pretty cool. Maybe a tad rough and loud?
  18. Replies
    22
    Views
    1,122

    Could be, probably isn't, but it certainly cannot...

    Could be, probably isn't, but it certainly cannot help. Depends on what got splashed.

    Did you clean it off? With what, if so?
  19. Replies
    22
    Views
    1,122

    That depends on what you can get to. Standard...

    That depends on what you can get to.

    Standard quick test is to measure resistance from each output to the + and - of the power supply, and reverse the leads (total 4 measurements). Unit should...
  20. Replies
    22
    Views
    1,122

    A VFD that indicates a fault (other than a "no...

    A VFD that indicates a fault (other than a "no load" fault) when there is nothing connected to the motor terminals probably has an internal defect of some sort.

    A short circuit fault in that...
  21. Replies
    9
    Views
    644

    If you are referring to induction generation, it...

    If you are referring to induction generation, it most definitely works with induction motors. I've done it, and there are many papers written on the subject.
  22. Replies
    9
    Views
    644

    I'm not sure I like the induction generator as a...

    I'm not sure I like the induction generator as a brake. This is for a couple reasons.

    One is that the generator action may or may not be instant.... it may need to "build up", depending on just...
  23. Replies
    45
    Views
    3,160

    The "Mini lathes" probably are just not good in...

    The "Mini lathes" probably are just not good in general.

    What I am used to calling a "hobby" lathe is (in the USA) a Logan, or Southbend. In the UK, a Boxford, or Myford. Not sure what it...
  24. Replies
    13
    Views
    1,066

    A couple of things..... first, the rubbing...

    A couple of things.....

    first, the rubbing looks like bearing shift or wear. Probably in the direction of belt pull, if it drives through a belt.

    Second, the blackening is probably not...
  25. It is not saying "moderated".

    It is not saying "moderated".
Results 1 to 25 of 1500
Page 1 of 60 1 2 3 4