Wiring a drum switch to a 208 disk sander

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Old 11-02-12, 05:44 PM
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Wiring a drum switch to a 208 disk sander

Hi All

This electrical problem has me perplexed. I switched a motor on a Apex sander from a 3 phase to a 208 single phase. Using a Furnas R 44 drum switch.

I went to a website where experts respond and got this diagram and have wired it according with no joy and a little smoke coming out of the motor.Name:  last wiring diagram from mike.jpg
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I then went on line and tried this diagram with no joy:Name:  diagram-from-practical-mach.jpg
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Does anyone have any ideas?
 
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Old 11-02-12, 06:13 PM
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Can you post a picture of the motor nameplate? I have never heard of a 208 volt single phase motor and those lead numbers suggest a delta wound three phase motor.
 
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Old 11-02-12, 07:17 PM
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You can't do what you want to do without a phase converter.
 
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Old 11-02-12, 07:27 PM
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motor plates

Motor plates it is a single phase motor that is reversible

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Old 11-02-12, 08:07 PM
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Are you using it on a single phase 240 volt circuit? Is it wired for 120v or 240v?
 
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Old 11-02-12, 09:51 PM
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Okay, I was confused because you stated a 208 volt motor rather than a 208-230 volt motor.

ASSUMING your drum switch is configured so that the 1, 2, and 4 terminals are connected together in one direction along with terminals 3, 5, and 6 terminals.

AND when switching to the other direction the 1, 2, and 3 terminals are connected together along with terminals 4, 5, and 6.

THEN you need to make a permanent and insulated connection from motor lead 2 to motor lead 3. Also make a permanent and insulated connection from line 1 to motor lead 1.

Connect line lead 2 to the switch terminal 2.

Connect motor lead 4 to switch terminal 1.

Connect motor lead 8 to switch terminal 3.

Connect motor lead 9 to switch terminal 5.

Connect motor lead 5 to switch terminal 4.
 
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Old 11-03-12, 08:46 AM
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Thanks Furd

No offense intended but your diagram is different from the other 2, I'm confused.
 
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Old 11-03-12, 01:33 PM
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Basically , there are two "Start" windings is series across 230 volts, and two 'Run" windings is series across 230 volts . A Forward / Reverse switch would connect the "Run"& "Start" windings in parallel and would change the "Start" winding parallel connection with the "Run" winding to change the rotation.

With "L1" & "L2" as the line-leads , "S1" and "S2" as the "Start' winding leads, and "R1" and
"R2" as the "Run" winding leads, we have this connection for "Forward" --- "L1" to "S1" & "R1"L2" to "S2" & "R2"

For "Reverse" , "L1" to "S2" and "R1" and "L2" to "S1" and "R2"




For "Reverse" "L1" to "S2" & "R1"
 
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Old 11-03-12, 02:29 PM
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Carefully read the second paragraph in my response, the one starting with ASSUMING.

Furnas makes their reversing drum switches in two very different configurations. In one it will close the left and right terminals at the bottom (furthest from the handle) in either the forward or reverse position of the handle. In the other configuration it has L-shaped bars in the "drum" that make the connections I detailed in that paragraph.

I have no idea what type of switch you have (the model number didn't come up on a Google search) and that is why I detailed the different connections. Nor do I have any idea of which connection scheme, or perhaps a completely different connection scheme, was used by the two responders to you on a different forum. I DID notice that one of them was referring to a GE switch and not a Furnas.

IF your switch does not conform to the description I gave, if your switch makes the two bottom contacts regardless of the handle position then what I wrote will NOT work. Verify the contacts on YOUR switch and post back.
 
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