Wiring motor speed control switch


  #1  
Old 04-12-17, 05:11 PM
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Wiring motor speed control switch

Hi,

My apologies in advance for what may be a long post, but I don't know a great deal about electronics and can only describe what i see.

I have an inexpensive but invaluable bandsaw that can run on 110 or 220 volts. The "on" switch is a trigger, and it has a 6 prong, 2 position switch for low and high speed, which I need to wire to the motor. As best I can tell, from the outlet a black and white wire go to the trigger, and a red and blue wire go from the trigger to the motor. The red wire attaches to one of the brush terminals, and the blue goes directly to one of the poles on the switch. There is a red wire attached to the other brush that also goes directly to the switch. There are 2? coils in the motor. A brown and a black wire come from one, and a blue and a black wire from the other. The black wire has another attached to it that bridges 2 posts on the switch as indicated in the diagram.

Regarding the schematic, that's what the manufacturer sent when I asked about a wiring diagram. It shows 5 wires coming from the motor instead of the 6 that are actually there, and the wire colors don't match.

If anyone has any ideas, it'd be appreciated.

Thanks,
Joshua

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  #2  
Old 04-12-17, 05:19 PM
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Welcome to the forums.

What happened ?? Why is it in pieces ??

You have a 120/240v motor which is going to increase the wiring difficulty.
What did you get for a wiring diagram ? Post it.

The make and model number may be of some help.
There are AT LEAST two coils to the motor.
 
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Old 04-12-17, 05:24 PM
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Ok.... I see it.....Grizzly G8692 Portable Bandsaw with Stand

That diagram doesn't look like it matches that switch.
Can you post a close-up picture of the switch part number ?

I know it's a Kedu HY12 xxxxxxx
 

Last edited by PJmax; 04-12-17 at 05:51 PM.
  #4  
Old 04-12-17, 06:42 PM
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Well, that's my fault. One of the blade guides seized and the blade twisted and started cutting into the guide and the body of the saw. I think the torque was too much because I could see the motor sparking more than usual and blue smoke was coming from the switch. I took the switch out, took a pic of the wires, and started replacing the melted connectors. That's what I thought at least, but I guess I didn't save the pic, so I emailed Grizzly and discovered that yeah, their diagram doesn't match the wires that I have. I do remember that those two posts were bridged, and that only 5 of them were used, so somewhere two other wires will have to be connected. I can put it back together in about two minutes, but I've been trying for the past two days to wrap my head around electric motors, alternating current, variable speed, and other things I know nothing about.

This is the best pic my craptasic phone could manage.

Thanks,
Joshua
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  #5  
Old 04-13-17, 01:46 PM
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I was mistaken. It's 110v only, not 110/240.
 
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Old 04-13-17, 05:47 PM
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Ok.... I've found the switch.

You have a picture of the wiring coming from the motor and brushes.
It's tough to see... can you spread them out a bit.
 
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Old 04-13-17, 06:56 PM
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To a pro this probably looks like it was drawn by a drunk ape.

This is what's there
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This probably isn't how they go
edit: definitely not right, only makes a bad buzzing sound.
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Last edited by josh67982; 04-13-17 at 08:06 PM.
 

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