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Electric motor help
bojangies46
Member Posts: 382 ✭✭
Hello I have a old air compressor that I need to reverse the motor so it runs the other way--can you do this by switching the wires? It is 220 and it is 50 years old or older. The compressor airs up OK and shuts off OK but the flywheel on the compressor turns the wrong way. THANKS FOR ANY HELP
Comments
Does the compressor work as is ? The fan on the flywheel will
still move air no matter which way it turns, it just wont be as
eficiant turning the wrong way. the compressor problly don't
care which way it turns ( sucks on the down stroke,blows on
the up stroke ) if it works, and has been for 50 years then
leave it alone, and let it pump.and keep in the open air.
That is a single phase motor, and is most likely not reversable
Does the compressor work as is ? The fan on the flywheel will
still move air no matter which way it turns, it just wont be as
eficiant turning the wrong way. the compressor problly don't
care which way it turns ( sucks on the down stroke,blows on
the up stroke ) if it works, and has been for 50 years then
leave it alone, and let it pump.and keep in the open air.
Single phase motors are reversible. Don
That is a single phase motor, and is most likely not reversable
Does the compressor work as is ? The fan on the flywheel will
still move air no matter which way it turns, it just wont be as
eficiant turning the wrong way. the compressor problly don't
care which way it turns ( sucks on the down stroke,blows on
the up stroke ) if it works, and has been for 50 years then
leave it alone, and let it pump.and keep in the open air.
Yes it is a single phase motor--the compressor is new but the motor is old--I put a fan on the other side of it to keep it cool --THANKS FOR YOUR HELP
Yes some are,and some are not.
Look at the motor, that one is. Don
this site might help
http://www.metalwebnews.com/howto/elec-mtr/elec-mtr.html
Not a big deal I just thought you could switch a couple of wires--THANKS FOR THE HELP
LEAVE IT ALONE!! Use it another 50 years and pass it on to your kids...
If the flywheel is keyed and not tapered, just remove and reverse it.[;)]
(And that's why they pay me he big bucks.)[^]
WHY, all of a sudden, do U THINK it needs to be reversed? ( fan direction?) She's worked just fine this long.
LEAVE IT ALONE!! Use it another 50 years and pass it on to your kids...
GOOD POINT[:)][:)]
direction it blows, only reversing the rotation will
change the way it blows.
Not a big deal I just thought you could switch a couple of wires--THANKS FOR THE HELP
Hey cool, it says "MADE IN U.S.A." on the label, ya don't see that much these days. [V]
Dual voltage, cap start motor you probably need to exchange #5 & #6 motor leads....
Don
"plan b" if it has no capacitor. You should still be able to change rotation. Remove pulley, remove motor end caps, pull rotor out, stick it back in with with output shaft on other side. re-assemble.
Margaret Thatcher
"There are three kinds of lies: lies, damned lies and statistics."
Mark Twain
I looked at your pics. It does not look like this motor has a capacitor. If it does not it is not reversible. If it does, you switch the wires after the capacitor. Open the pecker head on top of the motor it could be in there, but not likely.
"plan b" if it has no capacitor. You should still be able to change rotation. Remove pulley, remove motor end caps, pull rotor out, stick it back in with with output shaft on other side. re-assemble.
The wires are much better than they look
Make a new offset mount and mount the moter in a mirror image of where it is now. That will turn the compressor the opposite direction.
THANK YOU for the help[:D]
need to dischsrge before switching wires or you might have a shocking experiance[:p]
bojangies46, switch the 2 tan wires. Looks plug and play. The capacitors could/should be charged. Do you have a volt meter?
need to dischsrge before switching wires or you might have a shocking experiance[:p]
THANK YOU RCOANE--thats what I thought but me and electric stuff dont get along very good--I can rebuild a old car but when it comes to electric stuff I am dumb as a box of rocks--how do you discharge the capacitors --I dont have a volt meter but I can get one--THANKS FOR ALL YOUR HELP--BO[:)]
Want to be sure? Take an old screwdriver and short the caps one at a time. Obviously I'd use an insulated driver unless you're looking for a thrill.
A charged cap will discharge with a nice spark and pop. That's it. Maybe a burned spot on the driver.
Caps will be discharged if you cross positive and neutral.
Want to be sure? Take an old screwdriver and short the caps one at a time. Obviously I'd use an insulated driver unless you're looking for a thrill.
A charged cap will discharge with a nice spark and pop. That's it. Maybe a burned spot on the driver.
Nords methed is a common way to discharge. It looks like it may be the best too. It looks like it a little tight in there and you might discharge by accident. If you could get a meter that can handle 240v, which would probly be a 600v, you would know if it is charged or not. Just try to touch were the spade and wire connects. That way if it wrecks something it should be a cheap fix. You may want to put on some gloves too. If the screw driver has a unseen crack your not going to like it. If you've done any welding this wont bother you a bit. If you get nailed, welcome to the club[}:)] Good luck.
quote:Originally posted by nord
Caps will be discharged if you cross positive and neutral.
Want to be sure? Take an old screwdriver and short the caps one at a time. Obviously I'd use an insulated driver unless you're looking for a thrill.
A charged cap will discharge with a nice spark and pop. That's it. Maybe a burned spot on the driver.
Nords methed is a common way to discharge. It looks like it may be the best too. It looks like it a little tight in there and you might discharge by accident. If you could get a meter that can handle 240v, which would probly be a 600v, you would know if it is charged or not. Just try to touch were the spade and wire connects. That way if it wrecks something it should be a cheap fix. You may want to put on some gloves too. If the screw driver has a unseen crack your not going to like it. If you've done any welding this wont bother you a bit. If you get nailed, welcome to the club[}:)] Good luck.
THANK YOU GUYS FOR ALL THE HELP__DID WHAT YOU SAID AND IT IS UP AND RUNNING THE WAY IT SHOULD--THANKS AGAIN----BO