Reversing single phase motor rotation.

[Packard V8]

Many dual voltage (110/220) 1-phase motors have a wiring diagram for six wires, with instructions for reversing rotation by changing the position of a couple of wires.

The 1984-vintage import capacitor start 1-hp motor in question here has six wires, with voltage instructions, but no rotation notation.

The 110 v. diagram shows connecting (1, 3) to one line-in leg and (2, 4) to the other.

The 220 v. shows connecting (1) to one leg, (4) to the other and pairing (2, 3).

There are three connecting strips, with the outer two used for line power and the above connections.

The center strip has a red wire coming from the interior of the motor, but no line connection. Oddly, there is a second red wire in there with a bare end not connected to anything. There is no mention of the red wires on the very sparse diagram.

I've tried reversing the connections, (1, 4) and (2, 3), with no result. Then, tried (1, 2) and (3, 4)

I also tried switching the two red wires, with no result.

Any suggestions?

jack vines

 

[2oolhound]

I lost the wiring diagram for mine but as I recall there is one wire that only connects for left rotation and one wire for right rotation and they are not in use or connected when the opposite rotation is being used.

Google is your friend:

https://www.google.ca/search?client...&oe=UTF-8&gfe_rd=cr&ei=sJW7VpGWBq-j-AOkoYyoBw

 

[ttpete]

I lost the wiring diagram for mine but as I recall there is one wire that only connects for left rotation and one wire for right rotation and they are not in use or connected when the opposite rotation is being used.

Google is your friend:

https://www.google.ca/search?client...&oe=UTF-8&gfe_rd=cr&ei=sJW7VpGWBq-j-AOkoYyoBw

The connection of the start winding determines the direction of rotation. You'll have two wires for the start winding, and they are connected across the line terminals. Reverse the connections to reverse the direction.

 

[Rtw5150]

Are you trying to wire it for 120v or 240v? It sounds like you have a split phase motor, if so 1,2 & 3,4 would be your running winding and the other 2 wires (usually 1 red & 1 black) are the starting windings.

 

[Packard V8]

Can run on either. It's a capacitor start which I thought is different than split phase.

jack vines

 

[larry4406]

Thanks for posting this.

If reversing the leads on the start capacitor is all that is needed to change rotation, can I use a 4-way light switch to achieve this reversal thereby being able to have forward and reverse? Obviously, change directions only when stopped and power off. I can see this being useful on my drill press which has a 120V reversible Dayton motor.

 

[Semohandyman]

It was not uncommon for electric motor manufactures to make non reversing motors if it was not for general purpose use. If the manufacture did not need for it to reverse for what ever reason they would order it like that. I think you have a non reversing motor.

 

[Doug Arthurs]

Larry4406 get a drum switch for reversing motors.

 

[larry4406]

My Dayton motor is factory reversible. Says to switch leads to achieve reverse. Why won't a simple 4-way switch work to reverse the direction? Much cheaper than a drum switch.

 

[Dagny]

on small motors use 3 pole 2 throw motor rated toggle switch. 4 way will work but is not rated for it. it will also require another switch to turn it on and off. The 3 pole will have to have wires added in the x pattern like the 4 way on2 of the poles then use remaining pole to switch power.

 

[OccupantRJ]

Thanks for posting this.

If reversing the leads on the start capacitor is all that is needed to change rotation, can I use a 4-way light switch to achieve this reversal thereby being able to have forward and reverse? Obviously, change directions only when stopped and power off. I can see this being useful on my drill press which has a 120V reversible Dayton motor.

Yes you can do this. I set my drill press up in this manner.

 

[monkeyspanners]

I have swapped the motor end bells before to reverse the rotation, have to make sure the windings are central etc or it shouldn't be done. Might be useful to someone.

 

[Cubatime]

That motor is non-reversible. (At least without reconnecting the winding inside). As was posted earlier, many offshore motors are manufactured for a set rotation.

Brian

 

[Packard V8]

That motor is non-reversible. (At least without reconnecting the winding inside). As was posted earlier, many offshore motors are manufactured for a set rotation. Brian

That's what I was afraid of, since there was no diagram info. It seems to be a clockwise rotation only.

Interestingly, and maybe of some information, in one of the wire-swapping experiments, the motor didn't start, but just hummed. I gave it a counter-clockwise flip and it ran up just fine as long as connected.

jack vines

 

[larry4406]

Yes you can do this. I set my drill press up in this manner.

Thank you!. A switch for on/off and a separate switch for forward/reverse.

I will add this to my list of projects.

 

[ttpete]

Thank you!. A switch for on/off and a separate switch for forward/reverse.

I will add this to my list of projects.

Why do that when you can have a drum switch that does it all?

http://www.amazon.com/dp/B004VBTPDW/?tag=atomicindus08-20

 

[larry4406]

Why do that when you can have a drum switch that does it all?

http://www.amazon.com/dp/B004VBTPDW/?tag=atomicindus08-20

$45 for a drum switch vs the switches I have already. I think I'd rather have 2 cases of beer than a drum switch.

In all seriousness, 99.999% of the time the drill press will be in forward. In the rare occasion I use a left hand bit, well then flip a switch for reverse, then flip the "on" switch.

 

[OccupantRJ]

$45 for a drum switch vs the switches I have already. I think I'd rather have 2 cases of beer than a drum switch.

In all seriousness, 99.999% of the time the drill press will be in forward. In the rare occasion I use a left hand bit, well then flip a switch for reverse, then flip the "on" switch.

Besides, it's more fun to flip the 4 way switch while the motor is running to show others it does nothing then. It will come back into play once the centrifugal switch clicks shut.

 

[larry4406]

Besides, it's more fun to flip the 4 way switch while the motor is running to show others it does nothing then. It will come back into play once the centrifugal switch clicks shut.

My thoughts exactly.