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Posted by Bernard Arnest on April 20, 2006, 12:22 am
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Hi,
I'm looking around motor for a grinder. someone pointed out that
compressor-duty motors are non-reversible. I didn't think this an
issue previously, but it occurs to me that if I build a buffing wheel
opposite the grinder, off the same motor, for each to run in the proper
rotation I would have to reverse the rotation of the motors.
Assuming a conventional, reversible motor (I'm not on the question
of compressor motor or not here), does this involve rewiring the motor
each time? Even if just 10 minutes of work, it would be a nuisance;
since it would not just be a one-time rewiring, but every time I want
to switch between machines. Could I build a simple device that would
rewire it by flipping a switch, if this is the case?
btw, how much more efficient is 3 phase over 2? It seems a
converter is affordable off of ebay, and it looks like it would make
every subsequent motor cheaper, and/or more efficient and
smoother-running?
thanks!
-Bernard Arnest
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Posted by Steve W. on April 20, 2006, 9:10 am
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Why would they run in opposite directions? You want a grinding wheel to
run so that the grinding face is traveling down, that is the same as a
buffing wheel, down and away from you.
--
Steve W.
> Hi,
> I'm looking around motor for a grinder. someone pointed out that
> compressor-duty motors are non-reversible. I didn't think this an
> issue previously, but it occurs to me that if I build a buffing wheel
> opposite the grinder, off the same motor, for each to run in the
proper
> rotation I would have to reverse the rotation of the motors.
>
> Assuming a conventional, reversible motor (I'm not on the question
> of compressor motor or not here), does this involve rewiring the motor
> each time? Even if just 10 minutes of work, it would be a nuisance;
> since it would not just be a one-time rewiring, but every time I want
> to switch between machines. Could I build a simple device that would
> rewire it by flipping a switch, if this is the case?
>
>
> btw, how much more efficient is 3 phase over 2? It seems a
> converter is affordable off of ebay, and it looks like it would make
> every subsequent motor cheaper, and/or more efficient and
> smoother-running?
>
> thanks!
> -Bernard Arnest
>
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Posted by Bernard Arnest on April 20, 2006, 10:45 am
Please log in for more thread options Exactly. Because they are on opposite sides of the same stand/motor, to
conserve space.
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Posted by on April 20, 2006, 12:20 pm
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>Exactly. Because they are on opposite sides of the same stand/motor, to
>conserve space.
You are sleeping, Bernard.
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Posted by Steve W. on April 20, 2006, 1:27 pm
Please log in for more thread options OK I think I see what you plan on doing now. Your thinking of putting
the motor in the middle and having two separate units mounted to run off
of it, kind of like a small lineshaft arrangement. with equipment
located to the front/back of the motor.
In that case I would not bother with reversing the motor. I would just
run either a reversing 1:1 gearbox on one item or twist the belt driving
one shaft. That way they all run the same direction and you won't have
problems with loosening of the retaining nuts.
--
Steve W.
Life is not like a box of chocolates
it's more like a jar of jalapenos-
what you do today could burn your ass tomorrow!
> Exactly. Because they are on opposite sides of the same stand/motor,
to
> conserve space.
>
>
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> I'm looking around motor for a grinder. someone pointed out that
> compressor-duty motors are non-reversible. I didn't think this an
> issue previously, but it occurs to me that if I build a buffing wheel
> opposite the grinder, off the same motor, for each to run in the