Re: 7.5 HP Lathe on a 10 HP idler?

Thanks Iggy.

No I really meant to say a swap of any 2 leads going to the load would reverse the load. My bad!

Perhaps Jim will get back to us on some questions posed in an earlier post on this subject.

Bob Swinney
"Ignoramus24574" <ignoramus24574@xxxxxxxxxxxxxxxxxxxx> wrote in message
news:E7mdnfRfI7gIBozXnZ2dnUVZ_hZi4p2d@xxxxxxxxxxxxxxx
On 2009-05-18, Robert Swinney <judybob@xxxxxxxxx> wrote:
Lloyd,

That's the way I read it too. In a perfectly balanced system, as
Jim depicted, both motors would stall. Of course, that is as Jim
sez, a fairy tale system. In the stark world of actuality, even a
slight imbalance would eventually reverse the idler.

Did you really mean to say "reverse the idler"?

i

Bob Swinney
"Lloyd E. Sponenburgh" <lloydspinsidemindspring.com> wrote in message
news:Xns9C0F81F29BB1Dlloydspmindspringcom@xxxxxxxxxxxxxxx
"Robert Swinney" <judybob@xxxxxxxxx> fired this volley in
news:wKednbICp8shE4zXnZ2dnUVZ_uadnZ2d@xxxxxxxxxxxx:

Jim, my confusion arises in that AFAIK if we were to "plug reverse"
only the load motor, the connections would be single-phase line to
A,
B of the idler, A of idler to B of load, and B of idler to A of
load,
With C terminals together. It seems to me this connectivity would
reverse only the load motor, not both motors.

Please explain if this is not the case.

My read on this is that, in the absence of start or run capacitors,
the motors could be spun up in either direction. When the attempt is
made to plug-reverse the load motor, it won't reverse the idler
(alone) What it's actually trying to do is reverse BOTH of them, and
it'll simply stall both in the effort.

In this perfect parallel connection, there's nothing to distinguish
the idler from the load motor except where it's physically located.

LLoyd


.

Relevant Pages

  • Re: 7.5 HP Lathe on a 10 HP idler?
    ... No I really meant to say a swap of any 2 leads going to the load would reverse the load. ... motor whose leads are being reversed, ...
    (rec.crafts.metalworking)
  • Re: 7.5 HP Lathe on a 10 HP idler?
    ... terminals A, B of the load. ... "1) If you swap two leads L1 and L2 going to the idler, ... No I really meant to say a swap of any 2 leads going to the load would reverse the load. ... motor whose leads are being reversed, ...
    (rec.crafts.metalworking)
  • Re: 7.5 HP Lathe on a 10 HP idler?
    ... speed, I wonder if instead of reversing the mill, the idler would ... reverse instead. ... In a running phase converter, that drives a load, ... can see how it could be the idler motor. ...
    (rec.crafts.metalworking)
  • Re: Searching for engineer experienced in 24V vehicle electrical design.
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    (sci.electronics.design)
  • Re: 7.5 HP Lathe on a 10 HP idler?
    ... the connections would be single-phase line to ... reverse only the load motor, ... control circuits running from single phase in the machine. ...
    (rec.crafts.metalworking)