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Posted by Existential Angst on February 4, 2010, 4:49 pm
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Awl --
So my buddy's fairly robust SouthBend-Nordic-15 (very accurate, 60" bed, I
believe) went on the fritz, blowing fuses -- worked the the night before,
the next morning, bzzzzt....
When he was in Brooklyn, I was mostly off the hook for his repairs, but now
that he is in Yonkers, not far from me.... goodgawd.....
So I open the lower panel, and Holy Shit..... the first thought that came
to my mind is:
Just how many fukn wires and electro-mechanical gadgets do you g-d need
to rotate a fukn spindle???????
I said, Dude, I hope you have a fukn book/print for this thing.....
Long story short, since he couldn't find the book, I eliminated all
supply-side problems, and then *I think* I was able to isolate the motor
electrically, and indeed, the motor appears blown.
Which in a sense is not so bad, because having that motor re-wound will
likely be a fraction of the cost of actually having to replace anything from
SouthBend.... The last switch gadget he had to buy was effing $900!!!!.
BUT, it is going to be one muthafucka to get to that motor, since the lathe
is in, uh, a fairly "compact" shop.... goodgawd.....
But here are the Qs:
1. Is this a "motor constantly on" type lathe, with the crank switch (off
the carriage) engaging a clutch?
Or is the motor itself activated by the carriage crank switch?
Ahm no spert, but the only clutch-ditty I've seen was the newer square head
Clausing Colchesters, with that shitty multi-plate ditty that never worked
right on our machine. Nice machine, but what a pita that clutch was.
2. WTF *IS* alladat shit inside the control panel?
I see a transformer (about 10 lbs mebbe), with a dozen taps going to a
terminal ditty with two bitty glass fuses; a heavy duty diode *full wave
rectifier*!! DC???? For what?????
A fancy-shmancy twist handle breakered switch, a semi-normal contactor, and
some abnormal relay with some kind of timer knob?? timing what???, and
three little can-type ditties, one in series with each phase wire, about
3/4" dia x 1" long.
And another terminal block with a cupla dozen wires on it.
Goodgawd..... for a *motor*????
I guess what I would like is mebbe an overview, and overall sense of why all
this stuff is necessary.
Heh, my crappy li'l 13x40 Enco has a bit of control box as well, but since
nuthin has broke yet, I don't have to be indignant about it yet.
He has the book "somewhere", altho if/when he finds it, I don't know how
helpful it would be for the print.
None of this is critical now, since I'm 99.9% sure it is a blown motor, but
goddamm, it would be nice to grok what alladat stuff is for.
--
EA
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Posted by Ignoramus25542 on February 4, 2010, 5:13 pm
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Could this be a variable speed DC drive?
Got a camera to take pix?
i
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Posted by Existential Angst on February 4, 2010, 5:37 pm
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> Could this be a variable speed DC drive?
No, straight gear head.
>
> Got a camera to take pix?
Good idea, once I get into the 19th century..... :(
--
EA
>
> i
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Posted by Tim Wescott on February 4, 2010, 8:27 pm
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On Thu, 04 Feb 2010 16:49:13 -0500, Existential Angst wrote:
> Awl --
>
> So my buddy's fairly robust SouthBend-Nordic-15 (very accurate, 60" bed,
> I believe) went on the fritz, blowing fuses -- worked the the night
> before, the next morning, bzzzzt....
>
> When he was in Brooklyn, I was mostly off the hook for his repairs, but
> now that he is in Yonkers, not far from me.... goodgawd.....
>
> So I open the lower panel, and Holy Shit..... the first thought that
> came to my mind is:
> Just how many fukn wires and electro-mechanical gadgets do you g-d
> need
> to rotate a fukn spindle???????
>
> I said, Dude, I hope you have a fukn book/print for this thing.....
>
> Long story short, since he couldn't find the book, I eliminated all
> supply-side problems, and then *I think* I was able to isolate the motor
> electrically, and indeed, the motor appears blown.
>
> Which in a sense is not so bad, because having that motor re-wound will
> likely be a fraction of the cost of actually having to replace anything
> from SouthBend.... The last switch gadget he had to buy was effing
> $900!!!!.
>
> BUT, it is going to be one muthafucka to get to that motor, since the
> lathe is in, uh, a fairly "compact" shop.... goodgawd.....
>
>
> But here are the Qs:
>
> 1. Is this a "motor constantly on" type lathe, with the crank switch
> (off the carriage) engaging a clutch?
> Or is the motor itself activated by the carriage crank switch?
>
> Ahm no spert, but the only clutch-ditty I've seen was the newer square
> head Clausing Colchesters, with that shitty multi-plate ditty that never
> worked right on our machine. Nice machine, but what a pita that clutch
> was.
>
>
> 2. WTF *IS* alladat shit inside the control panel?
>
> I see a transformer (about 10 lbs mebbe), with a dozen taps going to a
> terminal ditty with two bitty glass fuses; a heavy duty diode *full
> wave rectifier*!! DC???? For what?????
>
> A fancy-shmancy twist handle breakered switch, a semi-normal contactor,
> and some abnormal relay with some kind of timer knob?? timing what???,
> and three little can-type ditties, one in series with each phase wire,
> about 3/4" dia x 1" long.
> And another terminal block with a cupla dozen wires on it.
>
> Goodgawd..... for a *motor*????
>
> I guess what I would like is mebbe an overview, and overall sense of why
> all this stuff is necessary.
> Heh, my crappy li'l 13x40 Enco has a bit of control box as well, but
> since nuthin has broke yet, I don't have to be indignant about it yet.
>
> He has the book "somewhere", altho if/when he finds it, I don't know how
> helpful it would be for the print.
>
> None of this is critical now, since I'm 99.9% sure it is a blown motor,
> but goddamm, it would be nice to grok what alladat stuff is for.
If the DC went into the motor I'd suspect a synchronous machine, but why
in hell you'd need a synchronous motor on a lathe is totally beyond me.
Perhaps it was put in there specifically to confuse the hell out of
_you_, because you're special.
--
www.wescottdesign.com
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Posted by pdrahn@coinet.com on February 4, 2010, 9:53 pm
Please log in for more thread options
wrote:
> Awl --
>
> So my buddy's fairly robust SouthBend-Nordic-15 (very accurate, 60" bed, =
I
> believe) went on the fritz, blowing fuses -- worked the the night before,
> the next morning, bzzzzt....
>
> When he was in Brooklyn, I was mostly off the hook for his repairs, but n=
ow
> that he is in Yonkers, not far from me.... =A0goodgawd.....
>
> So I open the lower panel, and Holy Shit..... =A0the first thought that c=
ame
> to my mind is:
> =A0 =A0Just how many fukn wires and electro-mechanical gadgets do you g-d=
need
> to rotate a fukn spindle???????
>
> I said, Dude, I hope you have a fukn book/print for this thing.....
>
> Long story short, since he couldn't find the book, I eliminated all
> supply-side problems, and then *I think* I was able to isolate the motor
> electrically, and indeed, the motor appears blown.
>
> Which in a sense is not so bad, because having that motor re-wound will
> likely be a fraction of the cost of actually having to replace anything f=
rom
> SouthBend.... The last switch gadget he had to buy was effing $900!!!!.
>
> BUT, it is going to be one muthafucka to get to that motor, since the lat=
he
> is in, uh, a fairly "compact" shop.... =A0goodgawd.....
>
> But here are the Qs:
>
> 1. =A0Is this a "motor constantly on" type lathe, with the crank switch (=
off
> the carriage) engaging a clutch?
> Or is the motor itself activated by the carriage crank switch?
>
> Ahm no spert, but the only clutch-ditty I've seen was the newer square he=
ad
> Clausing Colchesters, with that shitty multi-plate ditty that never worke=
d
> right on our machine. =A0Nice machine, but what a pita that clutch was.
>
> 2. =A0 WTF =A0 *IS* =A0 alladat shit inside the control panel?
>
> I see a =A0transformer (about 10 lbs mebbe), with a dozen taps going to a
> terminal ditty with two bitty glass fuses; =A0a heavy duty diode *full wa=
ve
> rectifier*!! =A0DC???? =A0For what?????
>
> A fancy-shmancy twist handle breakered switch, a semi-normal contactor, a=
nd
> some abnormal relay with some kind of timer knob?? =A0timing what???, =A0=
and
> three little can-type ditties, one in series with each phase wire, about
> 3/4" dia x 1" long.
> And another terminal block with a cupla dozen wires on it.
>
> Goodgawd..... =A0 for a *motor*????
>
> I guess what I would like is mebbe an overview, and overall sense of why =
all
> this stuff is necessary.
> Heh, my crappy li'l 13x40 Enco has a bit of control box as well, but sinc=
e
> nuthin has broke yet, I don't have to be indignant about it yet.
>
> He has the book "somewhere", altho if/when he finds it, I don't know how
> helpful it would be for the print.
>
> None of this is critical now, since I'm 99.9% sure it is a blown motor, b=
ut
> goddamm, it would be nice to grok what alladat stuff is for.
> --
> EA
Many applications use a shot of DC to brake an AC motor.
Paul
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