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Old 03-21-2010, 07:00 PM   #1
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drum switch help


Hi, I have a 6" craftsmans metal cutting lathe and trying to wire a drum switch to it. The motor is a 1/3 hp westinghouse split phase motor 6.3 amp 1725 rpm. The switch is forward-off-reverse. There are two posts and two wires on the motor I'm not sure witch ones are start or run and how to go about wiring it there are 6 screws on the switch.I could probly post pics to someone Thanks
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Old 03-21-2010, 09:00 PM   #2
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I don't know about any other brand, but here's how to wire a Square D one;

1) The incoming hot goes to 6, the neutral goes to 2.

2) One of the terminal posts on the motor goes to 2, the other goes to 3 and 5.

3) The two wires in the motor go to 1 and 4.

If the motor turns backward when the switch is in forward, swap the wires on 1 and 4.

The motor needs to be almost completely stopped before reversing direction. If it's turning fast, and you reverse it, it'll keep turning in the same direction.

Rob
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Old 03-22-2010, 07:08 AM   #3
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drum switch


Thanks for your reply, Will I have to put a on and off switch like a light switch or will the drum switch take care of stopping the motor in the off position?, Also if I hook up a static phase converter the motor should reverse immidiatly Right ? Thanks again AL
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Old 03-22-2010, 05:36 PM   #4
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drum switch help


I'm having a problem connecting a drum switch to a 1/3 hp westing house motor. Micromind told me how he did his and I tried it but the motor just kinda hummed.only when the switch was in on position and nothing on the reverse position. The motor won't start in either direction. Thanks for any info on how to get this motor working. is there a way to just check the motor to see if it is still good ? The motor has two posts and two wires and is a split phase Thanks The motor was working when I bought it
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Last edited by fakeplay; 03-22-2010 at 05:38 PM. Reason: info
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Old 03-22-2010, 07:36 PM   #5
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A phase converter won't work at all with a single phase motor. It is designed to operate a 3 phase motor on single phase power.

To check the motor, connect one of the wires to one of the terminal posts. Connect the other wire to the other post. Apply 120 volts to the two posts. It should run. Note the direction of shaft rotation.

Now, swap the two motor wires on the posts. Again, apply 120 volts. It should run in the opposite direction.

The drum switch will indeed turn the motor off when it's in the off position.

To check the drum switch, there should be no continuity between any two terminals when it's in the off position.

When it's in reverse, there should be continuity between 1&2 (the top two), 3&4 (the middle two), 5&6 (the bottom two.

When it's in forward, there should be continuity between 1&3 (the top two on the left), 2&4 (the top two on the right), and 5&6 (the bottom two).

If the motor or the switch appears bad, write back. There are more tests we can do.

Rob
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Old 03-22-2010, 08:18 PM   #6
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drum switch


Thanks I will test it
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Old 03-22-2010, 08:50 PM   #7
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The motor started smoking so I pulled the plug
The switch has continuity as follows Top two have con, 3,6 have con, 5,4 have con in the forward position
rev, is top 2 has con , mid 2 has con, bot 2 has con
This switch came from shanghi china thru ebay with no directions. Thank for taking the time to help AL
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Old 03-26-2010, 12:00 PM   #8
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Burnt motor ?


Hi, I have a 1/3 hp split phase motor. I put power to it and it started smoking. Does this mean the motor is burnt out ? Also I could use some help on my last post "Drum switch help " Thanks
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Old 03-26-2010, 12:10 PM   #9
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forgive me for stating the obvious but if i'm not mistaken you do need 240v plus a neutral for a split phase motor do you not? was it wired up right? Anytime i see three screws on a hook up i automatically think 3-phase power.
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Old 03-26-2010, 01:45 PM   #10
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burnt motor


I'm just using it as a reversing switch. forward and reverse for the motor and off for the middle of the switch The switch can be used for single phase and three phase. The motor is 115 volts . Thanks
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Old 03-26-2010, 05:46 PM   #11
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A single phase motor's rotational direction is determined by the starting windings.

That drum switch can be wired to reverse the starting winding leads, causing the motor to reverse as well. You will not have instantaneous stopping or reversing capability.

You could throw it into "reverse" while it was running only to have the motor resume speed in the same direction.

There should be 2 different sets of terminals on the motor: One set for incoming power, and the other set for the starting windings. You will need to wire both the power, and starting winding switching loops thru the drum switch, with a crossover configuration on the starting windings for it to work properly.
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Old 03-26-2010, 06:15 PM   #12
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burnt motor


Thanks, Do you know any way to test the motor if it is still good ? I connected the two post to power and it didn't start but started to smoke so I unplugged it. How can I check if the motors still good ? thanks
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Old 03-27-2010, 03:36 AM   #13
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Quote:
...it didn't start but started to smoke ...
There is an old saying I've heard about motors:

1) Motors do not run on electricity, they run on smoke.
2) The electricity is only needed to keep the smoke from getting out.
3) Once the smoke gets out, the motor is no good.

Take it for what it's worth ...
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Old 03-27-2010, 07:20 AM   #14
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durnt motor


It was an old motor. R.I.P. Thanks
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