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post #1 of 11 Old 09-04-2015, 11:58 AM Thread Starter
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Jointer Wiring

I've been restoring an old 1910 Crescent 8" Jointer. The jointer came with a motor and a start/stop switch. The motor works, but as soon as it's plugged into the outlet, it runs, plus it's running in reverse. I'm terrible as far as reading electric diagrams, but I believe most motors are able to go in forward or reverse depending on how they're wired. So i'm wondering if I can do the same here.

I'd also like to use the start/stop buttons instead of plugging in the motor and removing it every time I want to run the jointer.

Can anyone give me any guidance on how to wire this up?

The current wiring mess:


The switch


The motor:
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post #2 of 11 Old 09-04-2015, 01:16 PM Thread Starter
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I was able to get the power cord removed and untangle everything. I labeled everything with colored tape to help me remember where everything was originally. The power cord seems straightforward:

Green - ground and unused
White - neutral and tied to only one wire - the long one sticking straight up in the pic
Black - power - connected to 3 motor wires (labeled with blue tape)

Now there are 3 wires left over (labeled with black tape) that are all from the motor and were joined. What are these for?

Any thoughts on how to reverse the motor? If i'm going to connect these to my start/stop - I assume i can use the same connections that the power cord was using. If so, then what and where do i need to make connections from the start/stop panel to the power cord?

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post #3 of 11 Old 09-04-2015, 02:11 PM
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It says right on the motor tag, that the wiring diagram is on the inside of the pecker head cover. Is it on there?

It will show you high and low, plus how to reverse it (if possible)
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post #4 of 11 Old 09-04-2015, 02:27 PM Thread Starter
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There's no wiring diagram unfortunately. The conduit cover didn't come with the motor.
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post #5 of 11 Old 09-04-2015, 02:30 PM
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Then its time to use google and search for wiring diagrams for single phase dual voltage motors
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post #6 of 11 Old 09-04-2015, 03:03 PM Thread Starter
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Thanks, i tried searching for the make/model and a corresponding wiring diagram, but didn't find anything.
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post #7 of 11 Old 09-04-2015, 03:35 PM
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Don't worry about the motor brand, just find a diagram with the same number of leads you have.
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post #8 of 11 Old 09-04-2015, 04:40 PM
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http://www.usmotors.com/TechDocs/Con...-Diagrams.aspx

Alexis de Tocqueville was a very smart man.
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post #9 of 11 Old 09-05-2015, 11:22 AM Thread Starter
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Thanks, that's actually the website i used. I was able to find one with 7 leads and thermal protection, so that narrowed it down to 1 pretty quickly. Then the only confusing thing was figuring out which wire was which. Thankfully they had old labels calling them P1, T1, etc., so I was able to follow the diagram pretty simply. I got the motor to spin in the right direction.

Any thoughts on how to wire up the switch - it's a square D switch? There seem to be 4 connections at the top plus the ground. I assume there are terminals at the bottom, but it's hard to tell if/how they're supposed to be hooked up. Any ideas on where to start on what key words I can search on?
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post #10 of 11 Old 09-05-2015, 12:53 PM
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Inputs are marked L, out puts are marked with a T.
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post #11 of 11 Old 09-05-2015, 12:56 PM
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Is there a model number on the switch cover? Looks like the two hot leads come off the bottom two terminals, assuming it's being wired for 240 volts? If so, attach the EGC (green wire from motor to the case.

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