Reversing motor

M

Mike G

Guest
Hello all. Hope you can help me.

My dishwasher washing pump seized, so i managed to rob a water pump from and
old washing machine i had laying around. The plastic pump end was similar
size so i was able to swap it (hence all the hoses fitted). However, the
volute casing requires the pump to run in a particular direction. The motor
from the washing machine runs in the opposite direction.

The motor is supplied by two wires, a live and neutral (mains). I have tried
swapping them over, but it still runs in the wrong direction to want i want
it to!

Is there any way I can reverse the direction of the motor??
(The motor does not have brushes, from what i can see.)

Many thanks.

Mike.
 
"Mike G" <nofixedabode@nostreet.com> wrote in message
news:A0eOb.12472$OA3.4647157@newsfep2-win.server.ntli.net...
Hello all. Hope you can help me.

My dishwasher washing pump seized, so i managed to rob a water pump from
and
old washing machine i had laying around. The plastic pump end was similar
size so i was able to swap it (hence all the hoses fitted). However, the
volute casing requires the pump to run in a particular direction. The
motor
from the washing machine runs in the opposite direction.

The motor is supplied by two wires, a live and neutral (mains). I have
tried
swapping them over, but it still runs in the wrong direction to want i
want
it to!

Is there any way I can reverse the direction of the motor??
(The motor does not have brushes, from what i can see.)

Many thanks.

Mike.
Click to expand...
Some of these small motors are similar on both ends except for the shaft. If
that is the case sometimes you can reverse the shaft and end assmblies so
the
shaft projects from the opposite end of the windings. This will reverse the
shaft
rotation. Some are built for one direction only and are very difficult to
reverse.
 
In article <zefOb.467$1f.483803@monger.newsread.com>,
"Thinker" <freedom@usa.com> wrote:

"Mike G" <nofixedabode@nostreet.com> wrote in message
news:A0eOb.12472$OA3.4647157@newsfep2-win.server.ntli.net...
Hello all. Hope you can help me.

My dishwasher washing pump seized, so i managed to rob a water pump from
and
old washing machine i had laying around. The plastic pump end was similar
size so i was able to swap it (hence all the hoses fitted). However, the
volute casing requires the pump to run in a particular direction. The
motor
from the washing machine runs in the opposite direction.

The motor is supplied by two wires, a live and neutral (mains). I have
tried
swapping them over, but it still runs in the wrong direction to want i
want
it to!

Is there any way I can reverse the direction of the motor??
(The motor does not have brushes, from what i can see.)

Many thanks.

Mike.



Some of these small motors are similar on both ends except for the shaft. If
that is the case sometimes you can reverse the shaft and end assmblies so
the
shaft projects from the opposite end of the windings. This will reverse the
shaft
rotation. Some are built for one direction only and are very difficult to
reverse.
Click to expand...
Addendum:
MOST of the small ones are built unidirectional, and are not only
difficult, but may very well be outright impossible to reverse. (Barring
insane attempts like a complete disassembly/rewire/reassembly, and even
that isn't guaranteed)

You want a reversible motor, you're going to have to get one
specifically set up for it if you don't want a major headache. Trying to
reverse an existing fractional-horsepower motor that wasn't originally
designed as bi-directional is more nightmare than it's likely to be
worth. *IF* you're lucky enough to have one where it's even *POSSIBLE*.

--
Don Bruder - dakidd@sonic.net <--- Preferred Email - SpamAssassinated.
Hate SPAM? See <http://www.spamassassin.org> for some seriously great info.
I will choose a path that's clear: I will choose Free Will! - N. Peart
Fly trap info pages: <http://www.sonic.net/~dakidd/Horses/FlyTrap/index.html>
 
On Sat, 17 Jan 2004 17:10:03 -0000, "Mike G"
<nofixedabode@nostreet.com> wrote:

Hello all. Hope you can help me.

My dishwasher washing pump seized, so i managed to rob a water pump from and
old washing machine i had laying around. The plastic pump end was similar
size so i was able to swap it (hence all the hoses fitted). However, the
volute casing requires the pump to run in a particular direction. The motor
from the washing machine runs in the opposite direction.

The motor is supplied by two wires, a live and neutral (mains). I have tried
swapping them over, but it still runs in the wrong direction to want i want
it to!

Is there any way I can reverse the direction of the motor??
(The motor does not have brushes, from what i can see.)

Many thanks.

Mike.

It may be possible. Really depends on what kind of motor. Does it have
Click to expand...
a centrifigul start switch? This switch can be heard clicking
sometimes when the motor starts and stops. When started it will click
when the motor is almost up to speed. And when power is removed you
can hear it click after the motor has slowed down a bit. This switch
is located on the motor shaft itself. That kind of motor may be
reversible. Some capacitor start motors are also reversible. So try to
identify this motor.
Cheers,
Eric
 
I've managed to disassemble it a bit. Unfortunately, the shaft is longer on
one end, so i can't just swap the impeller onto the other side.

I've noticed that a small metal component (capacitor?) is wired in series
from the live terminal, before the winding. The neutral winding ends
straight at the connection. I wonder now, if I change that component so that
its in series on the neutral side, if this would reverse the motor?

Any help, greatly appreciated.

Mike
 
In article <A0eOb.12472$OA3.4647157@newsfep2-win.server.ntli.net>,
"Mike G" <nofixedabode@nostreet.com> wrote:

Hello all. Hope you can help me.

My dishwasher washing pump seized, so i managed to rob a water pump from and
old washing machine i had laying around. The plastic pump end was similar
size so i was able to swap it (hence all the hoses fitted). However, the
volute casing requires the pump to run in a particular direction. The motor
from the washing machine runs in the opposite direction.
Click to expand...
The volute casing is optomized for a particular rotation. Centrifugal
pumps will work with either rotation, less efficient the 'wrong' way.
Have you tried it to se if it works?

--
free men own guns - slaves don't
www.geocities.com/CapitolHill/5357/
 
"Mike G" <nofixedabode@nostreet.com> wrote in message
news:e7sOb.13600$OA3.5062551@newsfep2-win.server.ntli.net...
I've managed to disassemble it a bit. Unfortunately, the shaft is longer
on
one end, so i can't just swap the impeller onto the other side.

I've noticed that a small metal component (capacitor?) is wired in series
from the live terminal, before the winding. The neutral winding ends
straight at the connection. I wonder now, if I change that component so
that
its in series on the neutral side, if this would reverse the motor?

Any help, greatly appreciated.

Mike

No. What you want to do is switch the part of the winding that is in series
Click to expand...
with the capacitor or the other part of the winding .
You will likely have something like this
-------------/ ----||-----winding-----
| switch |
main winding |
__ |________________________|
The switch is a centrifugal switch which opens when the motor is up to speed
(may not be there)
The top winding is the start winding and the || is the capacitor.
To reverse, reverse either the top winding or the main winding, not both.
--
Don Kelly
dhky@peeshaw.ca
remove the urine to answer
 
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